The internal meshing spur gear pair is the research object, and the potential energy method is applied to calculate the time-varying meshing stiffness of the internal gear. The internal gear tooth profile is divided into two parts: involute and transition curves, and the gear tooth stiffness is calculated by numerical integration based on accurate tooth profile, which improves the calculation accuracy. Analyzed the influence of different crack size parameters on the stiffness of internal meshing gears. A coupled dynamic model of a planetary system with internal gear crack faults was established, and the influence of cracks on the dynamic response of the planetary system was studied using Zoom-FFT spectrum and cepstrum analysis methods. The simulation results show that as the crack parameter size increases, the mesh stiffness of the internal gear pair gradually weakens, and the periodic vibration impact of the planetary-internal gear pair is also more severe. Cepstrum analysis can easily capture weak fault characteristic frequency information in the system and discover their variation patterns. The research results can provide a theoretical basis for the state monitoring and fault diagnosis of gear systems with crack defects.
{"title":"Calculation of Time-Varying Mesh Stiffness of Internal Gears based on Precise Tooth Profile and Dynamic Analysis of Planetary Systems with Root Cracks","authors":"Dongjiang Cao, Fengwei Qin, Lisong Cao, Chang Hongjjie","doi":"10.34257/gjreavol24is1pg29","DOIUrl":"https://doi.org/10.34257/gjreavol24is1pg29","url":null,"abstract":"The internal meshing spur gear pair is the research object, and the potential energy method is applied to calculate the time-varying meshing stiffness of the internal gear. The internal gear tooth profile is divided into two parts: involute and transition curves, and the gear tooth stiffness is calculated by numerical integration based on accurate tooth profile, which improves the calculation accuracy. Analyzed the influence of different crack size parameters on the stiffness of internal meshing gears. A coupled dynamic model of a planetary system with internal gear crack faults was established, and the influence of cracks on the dynamic response of the planetary system was studied using Zoom-FFT spectrum and cepstrum analysis methods. The simulation results show that as the crack parameter size increases, the mesh stiffness of the internal gear pair gradually weakens, and the periodic vibration impact of the planetary-internal gear pair is also more severe. Cepstrum analysis can easily capture weak fault characteristic frequency information in the system and discover their variation patterns. The research results can provide a theoretical basis for the state monitoring and fault diagnosis of gear systems with crack defects.","PeriodicalId":342934,"journal":{"name":"Global Journal of Researches in Engineering","volume":"69 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140376695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-27DOI: 10.34257/gjreavol24is1pg21
Dr. Fath Elrahman Ismaeal Ahmed, Gihad Abdelaziz Abdelghani Ibrahim, Khalil.B. Ahmed. A, Hajir Saeed, Suhail Kamil
This paper explores the challenges associated with limited battery capacity in drones and presents a comprehensive analysis of strategies to optimize energy harvesting and extend flight durations. Various energy generation methods, including piezoelectric and solar harvesting, are discussed, along with electrical circuit generation for wireless charging and communication-enabled energy delivery. The interdisciplinary nature of drone technology is highlighted, emphasizing the need for ongoing research in renewable energy models and innovative solutions like laser charging. The paper concludes with recommendations for further exploration and refinement of these strategies to enhance the future of UAVs.
{"title":"A Survey on Methods to Optimize Power Harvesting in Drones","authors":"Dr. Fath Elrahman Ismaeal Ahmed, Gihad Abdelaziz Abdelghani Ibrahim, Khalil.B. Ahmed. A, Hajir Saeed, Suhail Kamil","doi":"10.34257/gjreavol24is1pg21","DOIUrl":"https://doi.org/10.34257/gjreavol24is1pg21","url":null,"abstract":"This paper explores the challenges associated with limited battery capacity in drones and presents a comprehensive analysis of strategies to optimize energy harvesting and extend flight durations. Various energy generation methods, including piezoelectric and solar harvesting, are discussed, along with electrical circuit generation for wireless charging and communication-enabled energy delivery. The interdisciplinary nature of drone technology is highlighted, emphasizing the need for ongoing research in renewable energy models and innovative solutions like laser charging. The paper concludes with recommendations for further exploration and refinement of these strategies to enhance the future of UAVs.","PeriodicalId":342934,"journal":{"name":"Global Journal of Researches in Engineering","volume":"29 22","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140375723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-27DOI: 10.34257/gjreavol24is1pg1
Marc Abbott
Eliminating hydrocarbon transportation must be a fundamental goal for society if we are to negate Climate Change and its consequences. No source of CO2 emissions comes close to that of hydrocarbon fueled internal combustion engines and if we are to transition to a zero-carbon energy system, a viable alternative to hydrocarbon fuels must be found. Lithium-Ion powered vehicles or EV’s present society with a paradox, they emit zero emissions however the life cycle of Lithium-Ion batteries is a source of environmental concern through mining, deforestation of carbon sinks, the immense electrification requirements for battery production, recycling, and recharging. This communication proposes Hydrogen for Mobility as the future fuel for a pathway to a Zero Carbon Transportation System through utilizing both the existing internal combustion engine (ICE) and most existing transportation infrastructure, at the same time being cost effective, efficient and zero emitting. An overview of technologies will be discussed along with their Technology Readiness, benefits, and issues. This discussion expands on the concepts discussed in ‘Mobile Modular Hydrogen Power Generation – a Zero Carbon Energy System’. https://doi.org/10.5296/ijgs.v7i1.xxxx
{"title":"Hydrogen for Mobility: A Pathway to a Zero Carbon Transportation System","authors":"Marc Abbott","doi":"10.34257/gjreavol24is1pg1","DOIUrl":"https://doi.org/10.34257/gjreavol24is1pg1","url":null,"abstract":"Eliminating hydrocarbon transportation must be a fundamental goal for society if we are to negate Climate Change and its consequences. No source of CO2 emissions comes close to that of hydrocarbon fueled internal combustion engines and if we are to transition to a zero-carbon energy system, a viable alternative to hydrocarbon fuels must be found. Lithium-Ion powered vehicles or EV’s present society with a paradox, they emit zero emissions however the life cycle of Lithium-Ion batteries is a source of environmental concern through mining, deforestation of carbon sinks, the immense electrification requirements for battery production, recycling, and recharging.\u0000This communication proposes Hydrogen for Mobility as the future fuel for a pathway to a Zero Carbon Transportation System through utilizing both the existing internal combustion engine (ICE) and most existing transportation infrastructure, at the same time being cost effective, efficient and zero emitting. An overview of technologies will be discussed along with their Technology Readiness, benefits, and issues. This discussion expands on the concepts discussed in ‘Mobile Modular Hydrogen Power Generation – a Zero Carbon Energy System’. https://doi.org/10.5296/ijgs.v7i1.xxxx","PeriodicalId":342934,"journal":{"name":"Global Journal of Researches in Engineering","volume":"97 36","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140377469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-10DOI: 10.34257/gjregvol23is3pg15
Janne Heilala, Antti Salminen, Wallace Moreira Bessa, Jussi Kantola
Since the first industrial revolution, the leading role of emerging technologies has been highlighted in modernizing the industry and developing the workforce. This study explores the impact of Industry 4.0 digital technologies on manufacturing competitiveness, focusing on Finnish SMEs within the EU with a sample (n = 123). It utilizes extensive 2022 European Manufacturing Survey (EMS22) data. Advanced statistical techniques reveal complex connections between automation, competitive edge on services, and innovation models, among other factors. Robust statistical methods, including component and reliability analyses, reinforced the findings. The conclusion offers critical insights and identifies areas for further research in combining innovative manufacturing practices with technology education.
{"title":"Optimizing Smart Factories: A Data-Driven Approach","authors":"Janne Heilala, Antti Salminen, Wallace Moreira Bessa, Jussi Kantola","doi":"10.34257/gjregvol23is3pg15","DOIUrl":"https://doi.org/10.34257/gjregvol23is3pg15","url":null,"abstract":"Since the first industrial revolution, the leading role of emerging technologies has been highlighted in modernizing the industry and developing the workforce. This study explores the impact of Industry 4.0 digital technologies on manufacturing competitiveness, focusing on Finnish SMEs within the EU with a sample (n = 123). It utilizes extensive 2022 European Manufacturing Survey (EMS22) data. Advanced statistical techniques reveal complex connections between automation, competitive edge on services, and innovation models, among other factors. Robust statistical methods, including component and reliability analyses, reinforced the findings. The conclusion offers critical insights and identifies areas for further research in combining innovative manufacturing practices with technology education.","PeriodicalId":342934,"journal":{"name":"Global Journal of Researches in Engineering","volume":"93 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140511159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-10DOI: 10.34257/gjregvol23is3pg1
I. N. Dorokhov, Doc. V. Etkin
It is shown that the systems energydynamic approach, which takes into account the local heterogeneity of a natural object, significantly expands the capabilities of thermodynamic analysis and radically changes the conclusions of all fundamental theories based on hypotheses, postulates and model ideas about the mechanism of natural phenomena.
{"title":"Systems Energodynamic Approach as an Instrument of Increasing Efficiency of Engineering Developments","authors":"I. N. Dorokhov, Doc. V. Etkin","doi":"10.34257/gjregvol23is3pg1","DOIUrl":"https://doi.org/10.34257/gjregvol23is3pg1","url":null,"abstract":"It is shown that the systems energydynamic approach, which takes into account the local heterogeneity of a natural object, significantly expands the capabilities of thermodynamic analysis and radically changes the conclusions of all fundamental theories based on hypotheses, postulates and model ideas about the mechanism of natural phenomena.","PeriodicalId":342934,"journal":{"name":"Global Journal of Researches in Engineering","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140511054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-05DOI: 10.34257/gjreevol23is4pg1
Gert Noordzy, Richard Whitfield, Li-Chun Lin, Tshepo Makhudu
This is a case study on the development of the Kruger Shalati: The Train on the Bridge, a themed, luxury boutique hotel in Kruger National Park (KNP), South Africa. Two key drivers of this project were authenticity and a strong ethos for Environmental, Social and Governance (ESG). Considering the target market the hotel serves and the local situation, this case study explains why modular construction was better to build parts of the property, instead of using traditional in situ construction methods. It further explains how the hotel was built, and the challenges that had to be addressed to complete the project. Finally, it examines how the use of modular construction methods and the uniqueness of the project impacted the normal hotel pre-opening activities and ongoing hotel operations. This case study has been prepared after reviewing published materials about the project and extensively interviewing five senior members of the project team.
{"title":"Developing Kruger Shalati: The Train on the Bridge","authors":"Gert Noordzy, Richard Whitfield, Li-Chun Lin, Tshepo Makhudu","doi":"10.34257/gjreevol23is4pg1","DOIUrl":"https://doi.org/10.34257/gjreevol23is4pg1","url":null,"abstract":"This is a case study on the development of the Kruger Shalati: The Train on the Bridge, a themed, luxury boutique hotel in Kruger National Park (KNP), South Africa. Two key drivers of this project were authenticity and a strong ethos for Environmental, Social and Governance (ESG). Considering the target market the hotel serves and the local situation, this case study explains why modular construction was better to build parts of the property, instead of using traditional in situ construction methods. It further explains how the hotel was built, and the challenges that had to be addressed to complete the project. Finally, it examines how the use of modular construction methods and the uniqueness of the project impacted the normal hotel pre-opening activities and ongoing hotel operations. This case study has been prepared after reviewing published materials about the project and extensively interviewing five senior members of the project team.","PeriodicalId":342934,"journal":{"name":"Global Journal of Researches in Engineering","volume":"105 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139629540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-27DOI: 10.34257/gjrecvol23is1pg33
P. Koko, Katsunori Hanamura
In order to design a microporous membrane filter comprising Three-way Catalyst (TWC) particles with a size distribution of 1 to 2 microns, isothermal CO oxidation experiments and numerical simulations were conducted to investigate the transport of oxygen atoms within primary Ceria-Zirconia (CZ) particulates. These spherical TWC particles were fabricated through the agglomeration of primary CZ and alumina particulates, incorporating Pd and Rh catalysts. By comparing experimental CO2 emissions with simulation results over time, a temperature-dependent diffusion coefficient was determined. The simulation results reveal that the effective distance of oxygen atom transport within CZ particulates, heterogeneously distributed in the spherical TWC particle, is limited to approximately 100 nm from the surface of agglomerated spherical TWC particles within a temperature range of 175 to 225°C.
{"title":"Modeling of CO Oxidation by Diffusion of Oxygen Atoms in Ceria-Zirconia Particulates in a Three-Way Catalyst Particle Membrane Filter","authors":"P. Koko, Katsunori Hanamura","doi":"10.34257/gjrecvol23is1pg33","DOIUrl":"https://doi.org/10.34257/gjrecvol23is1pg33","url":null,"abstract":"In order to design a microporous membrane filter comprising Three-way Catalyst (TWC) particles with a size distribution of 1 to 2 microns, isothermal CO oxidation experiments and numerical simulations were conducted to investigate the transport of oxygen atoms within primary Ceria-Zirconia (CZ) particulates. These spherical TWC particles were fabricated through the agglomeration of primary CZ and alumina particulates, incorporating Pd and Rh catalysts. By comparing experimental CO2 emissions with simulation results over time, a temperature-dependent diffusion coefficient was determined. The simulation results reveal that the effective distance of oxygen atom transport within CZ particulates, heterogeneously distributed in the spherical TWC particle, is limited to approximately 100 nm from the surface of agglomerated spherical TWC particles within a temperature range of 175 to 225°C.","PeriodicalId":342934,"journal":{"name":"Global Journal of Researches in Engineering","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139231972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-12DOI: 10.34257/gjrefvol23is2pg1
Towhid A. Chowdhury
The performance of chip is degraded because of the short-channel effect (SCE) as the metal oxide semiconductor field effect transistor (MOSFET) size scales down. Silicon on insulator (SOI) technology helps to reduce the short channel effects and permits a good solution to the miniaturization. The electrical characteristics of fully depleted SOI (FDSOI) and partially depleted SOI (PDSOI) n-channel MOSFET (N-MOSFET) are investigated as silicon film thickness is varied in this paper. Both transistors are compared in terms of electrical parameters which are the threshold voltage, subthreshold slope, on-state current, leakage current and drain induced barrier lowering (DIBL). Silvaco TCAD tools are used for simulating both PDSOI and FDSOI MOSFETs. FDSOI MOSFET is superior to PDSOI MOSFET based on found simulation results.
{"title":"In vestigation the Impact of Silicon Film Thickness on FDSOI and PDSOI MOSFET Characteristics","authors":"Towhid A. Chowdhury","doi":"10.34257/gjrefvol23is2pg1","DOIUrl":"https://doi.org/10.34257/gjrefvol23is2pg1","url":null,"abstract":"The performance of chip is degraded because of the short-channel effect (SCE) as the metal oxide semiconductor field effect transistor (MOSFET) size scales down. Silicon on insulator (SOI) technology helps to reduce the short channel effects and permits a good solution to the miniaturization. The electrical characteristics of fully depleted SOI (FDSOI) and partially depleted SOI (PDSOI) n-channel MOSFET (N-MOSFET) are investigated as silicon film thickness is varied in this paper. Both transistors are compared in terms of electrical parameters which are the threshold voltage, subthreshold slope, on-state current, leakage current and drain induced barrier lowering (DIBL). Silvaco TCAD tools are used for simulating both PDSOI and FDSOI MOSFETs. FDSOI MOSFET is superior to PDSOI MOSFET based on found simulation results.","PeriodicalId":342934,"journal":{"name":"Global Journal of Researches in Engineering","volume":"125 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116851405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-29DOI: 10.34257/gjregvol23is2pg1
Xiaoxu Ji, Ethan Swierski, Maria Arenas, R. O. Hettiarachchige, Xin Gao, Jizhou Tong
Aircraft attendants are at a high risk of occupational injuries and illnesses, leading to substantial compensation costs and staff shortages in the aviation industry. To address this issue, this study introduces an innovative virtual reality technique and advanced motion tracking system integrated with ergonomics tools to effectively evaluate the risk of musculoskeletal disorders (MSDs) among aircraft attendants during their routine tasks. The study involved twenty-two participants who performed two common tasks: opening/closing the passenger door,and lifting luggage from the floor and placing it into the overhead compartment. The inappropriate postures were identified, which resulted in excessive strain on the participants’ lower back. By analyzing the impact of biomechanical variables, such as object weight, body height, and trunk motion, on the lower back, the study provides valuable insights that can inform the development of safety training programs and real-time monitoring approaches for injury prevention. Additionally, this innovative technology can be applied to other occupational fields.
{"title":"Evaluating the Risk of Injury for Aircraft Attendants using Virtual Reality and Advanced Motion Tracking System Integrated with Ergonomics Analysis","authors":"Xiaoxu Ji, Ethan Swierski, Maria Arenas, R. O. Hettiarachchige, Xin Gao, Jizhou Tong","doi":"10.34257/gjregvol23is2pg1","DOIUrl":"https://doi.org/10.34257/gjregvol23is2pg1","url":null,"abstract":"Aircraft attendants are at a high risk of occupational injuries and illnesses, leading to substantial compensation costs and staff shortages in the aviation industry. To address this issue, this study introduces an innovative virtual reality technique and advanced motion tracking system integrated with ergonomics tools to effectively evaluate the risk of musculoskeletal disorders (MSDs) among aircraft attendants during their routine tasks. The study involved twenty-two participants who performed two common tasks: opening/closing the passenger door,and lifting luggage from the floor and placing it into the overhead compartment. The inappropriate postures were identified, which resulted in excessive strain on the participants’ lower back. By analyzing the impact of biomechanical variables, such as object weight, body height, and trunk motion, on the lower back, the study provides valuable insights that can inform the development of safety training programs and real-time monitoring approaches for injury prevention. Additionally, this innovative technology can be applied to other occupational fields.","PeriodicalId":342934,"journal":{"name":"Global Journal of Researches in Engineering","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131477149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-27DOI: 10.34257/gjreivol23is1pg1
Xu Jiajin, Gao Zhentong
The Gaussian distribution is one of the most widely used statistical distributions, but there are a lot of data that do not conform to Gaussian distribution. For example, structural fatigue life is mostly in accordance with the Weibull distribution rather than the Gaussian distribution, and the Weibull distribution is in a sense a more general full state distribution than the Gaussian distribution. However, the biggest obstacle affecting the application of the Weibull distribution is the complexity of the Weibull distribution, especially the estimation of its three parameters is relatively difficult. In order to avoid this difficulty, people used to solve this problem by taking the logarithm to make the data appear to be more consistent with the Gaussian distribution. But in fact, this approach is problematic, because from the physical point of view, the structure of the data has changed and the physical meaning has changed, so it is not appropriate to use logarithmic Gaussian distribution to fit the original data after logarithm. The author thinks that Z.T. Gao method can give the estimation of three parameters of Weibull distribution conveniently, which lays a solid mathematical foundation for Weibull distribution to directly fit the original data.
{"title":"From Gaussian Distribution to Weibull Distribution","authors":"Xu Jiajin, Gao Zhentong","doi":"10.34257/gjreivol23is1pg1","DOIUrl":"https://doi.org/10.34257/gjreivol23is1pg1","url":null,"abstract":"The Gaussian distribution is one of the most widely used statistical distributions, but there are a lot of data that do not conform to Gaussian distribution. For example, structural fatigue life is mostly in accordance with the Weibull distribution rather than the Gaussian distribution, and the Weibull distribution is in a sense a more general full state distribution than the Gaussian distribution. However, the biggest obstacle affecting the application of the Weibull distribution is the complexity of the Weibull distribution, especially the estimation of its three parameters is relatively difficult. In order to avoid this difficulty, people used to solve this problem by taking the logarithm to make the data appear to be more consistent with the Gaussian distribution. But in fact, this approach is problematic, because from the physical point of view, the structure of the data has changed and the physical meaning has changed, so it is not appropriate to use logarithmic Gaussian distribution to fit the original data after logarithm. The author thinks that Z.T. Gao method can give the estimation of three parameters of Weibull distribution conveniently, which lays a solid mathematical foundation for Weibull distribution to directly fit the original data.","PeriodicalId":342934,"journal":{"name":"Global Journal of Researches in Engineering","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133352120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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