Pub Date : 2019-08-14DOI: 10.31534/engmod.2019.1.ri.01m
{"title":"GIS modelling of bathymetric data in the construction of port terminals - the example of Vlaška channel in the Port of Ploče","authors":"","doi":"10.31534/engmod.2019.1.ri.01m","DOIUrl":"https://doi.org/10.31534/engmod.2019.1.ri.01m","url":null,"abstract":"","PeriodicalId":35748,"journal":{"name":"International Journal for Engineering Modelling","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.31534/engmod.2019.1.ri.01m","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43305352","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 : 2019-08-02DOI: 10.31534/engmod.2019.1.ri.01f
I. Senjanović, N. Alujevic, I. Čatipović, D. Čakmak, N. Vladimir, Z. Lozina
ENGINEERING MODELLING 32 (2019) 1, 59-76 59 Some dilemmas in energy approach to vibration and stability analysis of pressurized and rotating toroidal shells Ivo Senjanović(1), Neven Alujević(1), Ivan Ćatipović(1), Damjan Čakmak(1), Nikola Vladimir(1), Željan Lozina(2) (1) University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, CROATIA e-mail: ivo.senjanovic@fsb.hr (2) University of Split, Faculty of Electrical and Mechanical Engineering and Naval Architecture, Split, CROATIA
Ivo senjanoviki (1)， Neven alujeviki (1)， Ivan Ćatipović(1)， Damjan Čakmak(1)， Nikola Vladimir(1)， Željan Lozina(2)(1)，克罗地亚萨格勒布大学机械工程与造船学院，萨格勒布，e- ming:ivo.senjanovic@fsb.hr(2)斯普利特大学机电工程与造船学院，克罗地亚斯普利特
{"title":"Some dilemmas in energy approach to vibration and stability analysis of pressurized and rotating toroidal shells","authors":"I. Senjanović, N. Alujevic, I. Čatipović, D. Čakmak, N. Vladimir, Z. Lozina","doi":"10.31534/engmod.2019.1.ri.01f","DOIUrl":"https://doi.org/10.31534/engmod.2019.1.ri.01f","url":null,"abstract":"ENGINEERING MODELLING 32 (2019) 1, 59-76 59 Some dilemmas in energy approach to vibration and stability analysis of pressurized and rotating toroidal shells Ivo Senjanović(1), Neven Alujević(1), Ivan Ćatipović(1), Damjan Čakmak(1), Nikola Vladimir(1), Željan Lozina(2) (1) University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, CROATIA e-mail: ivo.senjanovic@fsb.hr (2) University of Split, Faculty of Electrical and Mechanical Engineering and Naval Architecture, Split, CROATIA","PeriodicalId":35748,"journal":{"name":"International Journal for Engineering Modelling","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.31534/engmod.2019.1.ri.01f","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69997212","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 : 2019-08-02DOI: 10.31534/engmod.2019.1.ri.01v
S. Chiu, Hui-Cun Chen, Hong-Dar Lin
Facing global market’s rigid competition, today’s manufacturers need not only to satisfy the timely demands of multiproduct, but also to ensure quality of their goods. For the purpose of reducing fabrication cycle time so as to meet timely demands, outsourcing is always a helpful option in production planning. To address the aforementioned real issues, the present study derives the optimal common manufacturing cycle length for a multi-product inventory system, wherein a part of lot-size of each end product is supplied by an outside contractor, and in each cycle a rework process repairs random defects produced by the in-house process. The schedule of receipt time for outsourced items is practically assumed to be in the end of rework. A specific decision model is built to cautiously portray such a hybrid inventory problem. Through modeling, analysis, and derivation the expected annual system cost is obtained, and using optimization technique the optimal cycle length that minimizes system cost is gained. The proposed decision model not only can help find optimal solution to the problem, but also enables manufacturers to obtain diverse essential information, such as the critical outsourcing rate, individual manufacturing related cost for each end product, and influence or joint effects of variations in different system factor(s) on the problem. Without our in-depth exploration, the aforementioned information will still be unavailable to support managerial decision makings.
{"title":"Optimal common manufacturing cycle length for a multi-product inventory system with rework and an outside contractor","authors":"S. Chiu, Hui-Cun Chen, Hong-Dar Lin","doi":"10.31534/engmod.2019.1.ri.01v","DOIUrl":"https://doi.org/10.31534/engmod.2019.1.ri.01v","url":null,"abstract":"Facing global market’s rigid competition, today’s manufacturers need not only to satisfy the timely demands of multiproduct, but also to ensure quality of their goods. For the purpose of reducing fabrication cycle time so as to meet timely demands, outsourcing is always a helpful option in production planning. To address the aforementioned real issues, the present study derives the optimal common manufacturing cycle length for a multi-product inventory system, wherein a part of lot-size of each end product is supplied by an outside contractor, and in each cycle a rework process repairs random defects produced by the in-house process. The schedule of receipt time for outsourced items is practically assumed to be in the end of rework. A specific decision model is built to cautiously portray such a hybrid inventory problem. Through modeling, analysis, and derivation the expected annual system cost is obtained, and using optimization technique the optimal cycle length that minimizes system cost is gained. The proposed decision model not only can help find optimal solution to the problem, but also enables manufacturers to obtain diverse essential information, such as the critical outsourcing rate, individual manufacturing related cost for each end product, and influence or joint effects of variations in different system factor(s) on the problem. Without our in-depth exploration, the aforementioned information will still be unavailable to support managerial decision makings.","PeriodicalId":35748,"journal":{"name":"International Journal for Engineering Modelling","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.31534/engmod.2019.1.ri.01v","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48296714","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 : 2019-03-27DOI: 10.31534/engmod.2018.4.si.05s
The purpose of this paper is to improve the performance of the original AFSA algorithm at the optimal accuracy rate and overcome the weakness of the algorithm which is also trapped in the local optimum. To this end, the original AFSA was further improved based on the tabu strategy. Specifically, the reproduction and death were introduced to protect the best individuals and eliminate poor quality fish, so as to increase convergence and accuracy. Through simulation, it is proved that our solution can achieve high accuracy, good global convergence, and strong resistance to local minimum. The findings bring new light on the application of AFSA and provide valuable reference to studies in related fields.
{"title":"An Improved Artificial Fish Swarm Algorithm","authors":"","doi":"10.31534/engmod.2018.4.si.05s","DOIUrl":"https://doi.org/10.31534/engmod.2018.4.si.05s","url":null,"abstract":"The purpose of this paper is to improve the performance of the original AFSA algorithm at the optimal accuracy rate and overcome the weakness of the algorithm which is also trapped in the local optimum. To this end, the original AFSA was further improved based on the tabu strategy. Specifically, the reproduction and death were introduced to protect the best individuals and eliminate poor quality fish, so as to increase convergence and accuracy. Through simulation, it is proved that our solution can achieve high accuracy, good global convergence, and strong resistance to local minimum. The findings bring new light on the application of AFSA and provide valuable reference to studies in related fields.","PeriodicalId":35748,"journal":{"name":"International Journal for Engineering Modelling","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.31534/engmod.2018.4.si.05s","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69996961","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 : 2019-03-27DOI: 10.31534/engmod.2018.4.si.01g
Tai Lingjuan, Liu Linhong, Li Menghan
SUMMARY Aiming to promote the effective connection between the individual farmers and the modern “big market” and improve the logistics efficiency of agricultural products, this paper offers a logistics model for decentralized production to achieve organized information and large-scaled transportation. Based on the in-depth analysis of the traditional agricultural product logistics chain, this paper originates a network logistics model for agricultural products. It constructs a two-stage framework (grouping first and then scheduling), analyzes the “First Mile” logistics routes, and then uses the improved loop routes optimization algorithm to obtain the approximate optimal solution to the model. Through example verification, it is found that the model can help improve the efficiency of logistics distribution and save the logistics costs of small agricultural products from fragmented land. Moreover, the results show that the agricultural product logistics method based on overall transportation and information management is obviously superior to the traditional logistics methods.
{"title":"Optimization of the Front-end Logistics Routes of Agricultural Products Based on Network Platform","authors":"Tai Lingjuan, Liu Linhong, Li Menghan","doi":"10.31534/engmod.2018.4.si.01g","DOIUrl":"https://doi.org/10.31534/engmod.2018.4.si.01g","url":null,"abstract":"SUMMARY Aiming to promote the effective connection between the individual farmers and the modern “big market” and improve the logistics efficiency of agricultural products, this paper offers a logistics model for decentralized production to achieve organized information and large-scaled transportation. Based on the in-depth analysis of the traditional agricultural product logistics chain, this paper originates a network logistics model for agricultural products. It constructs a two-stage framework (grouping first and then scheduling), analyzes the “First Mile” logistics routes, and then uses the improved loop routes optimization algorithm to obtain the approximate optimal solution to the model. Through example verification, it is found that the model can help improve the efficiency of logistics distribution and save the logistics costs of small agricultural products from fragmented land. Moreover, the results show that the agricultural product logistics method based on overall transportation and information management is obviously superior to the traditional logistics methods.","PeriodicalId":35748,"journal":{"name":"International Journal for Engineering Modelling","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.31534/engmod.2018.4.si.01g","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44025166","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 : 2019-03-27DOI: 10.31534/engmod.2018.4.si.02g
{"title":"Risk Decision for Dual-Channel Supply Chain of Agricultural Products Under Disturbance","authors":"","doi":"10.31534/engmod.2018.4.si.02g","DOIUrl":"https://doi.org/10.31534/engmod.2018.4.si.02g","url":null,"abstract":"","PeriodicalId":35748,"journal":{"name":"International Journal for Engineering Modelling","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.31534/engmod.2018.4.si.02g","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69996637","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 : 2019-01-01DOI: 10.31534/engmod.2018.3.ri.08f
Song Shixin, Sun Wanchen, X. Feng, Peng Silun, Sun Farong, Wang Da
Stable boundary is analysed and corresponding stability criterion is proposed based on sideslip angle speedsideslip angle phase plane. First, we analyse the impact of adhesion coefficient, longitudinal speed and front wheel angle on phase plane stable boundary, then we simplify the hyperbolic boundary with polyline. Stability criterion is then built based on the distance between locus and stable boundary. The proposed stability criterion is integrated to vehicle stability control system, and simulations are run under Matlab/Simulink-Carsim co-simulation platform. The results show that stability criterion based on sideslip angle speedsideslip angle phase plane can evaluate vehicle stability state; under SWD/SIS steering condition and DLC condition, stability control system based on the proposed stability criterion improved vehicle stability significantly.
{"title":"Vehicle stability criterion based on three-fold line method","authors":"Song Shixin, Sun Wanchen, X. Feng, Peng Silun, Sun Farong, Wang Da","doi":"10.31534/engmod.2018.3.ri.08f","DOIUrl":"https://doi.org/10.31534/engmod.2018.3.ri.08f","url":null,"abstract":"Stable boundary is analysed and corresponding stability criterion is proposed based on sideslip angle speedsideslip angle phase plane. First, we analyse the impact of adhesion coefficient, longitudinal speed and front wheel angle on phase plane stable boundary, then we simplify the hyperbolic boundary with polyline. Stability criterion is then built based on the distance between locus and stable boundary. The proposed stability criterion is integrated to vehicle stability control system, and simulations are run under Matlab/Simulink-Carsim co-simulation platform. The results show that stability criterion based on sideslip angle speedsideslip angle phase plane can evaluate vehicle stability state; under SWD/SIS steering condition and DLC condition, stability control system based on the proposed stability criterion improved vehicle stability significantly.","PeriodicalId":35748,"journal":{"name":"International Journal for Engineering Modelling","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.31534/engmod.2018.3.ri.08f","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69996625","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 : 2019-01-01DOI: 10.31534/ENGMOD.2018.3.RI.01V
R. Su, Ming-Wei Weng, Yung-Fu Huang, K. Lai
This paper may provide an alternative to the problem of a two-stage assembly system with imperfect processes in a single manufacturer-retailer and two-level integrated supply chain. A mathematical model is developed based on the following scenarios: (a) the manufacturer and the retailer are in different countries where the exchange rate is uncertain; (b) the fixed and variable carbon emission costs are incorporated into current environmental issues; (c) shortage is allowed, and the unsatisfied demand is completely backlogged. In the light of these concerns, our model is to determine the production run time, the shortage time period and defective rate of manual stage. The optimal solutions are computed by our proposed algorithm. Finally, a numerical example and sensitivity analysis are carried out to illustrate the model.
{"title":"Two-stage assembly system with imperfect items for a coordinated two-level integrated supply chain under carbon emission constraints","authors":"R. Su, Ming-Wei Weng, Yung-Fu Huang, K. Lai","doi":"10.31534/ENGMOD.2018.3.RI.01V","DOIUrl":"https://doi.org/10.31534/ENGMOD.2018.3.RI.01V","url":null,"abstract":"This paper may provide an alternative to the problem of a two-stage assembly system with imperfect processes in a single manufacturer-retailer and two-level integrated supply chain. A mathematical model is developed based on the following scenarios: (a) the manufacturer and the retailer are in different countries where the exchange rate is uncertain; (b) the fixed and variable carbon emission costs are incorporated into current environmental issues; (c) shortage is allowed, and the unsatisfied demand is completely backlogged. In the light of these concerns, our model is to determine the production run time, the shortage time period and defective rate of manual stage. The optimal solutions are computed by our proposed algorithm. Finally, a numerical example and sensitivity analysis are carried out to illustrate the model.","PeriodicalId":35748,"journal":{"name":"International Journal for Engineering Modelling","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.31534/ENGMOD.2018.3.RI.01V","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69996424","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 : 2019-01-01DOI: 10.31534/engmod.2018.3.ri.07f
Xu Yu, C. Ming, Liu Jing-yuan, Cheng Li
Caused by the foreign object damage (FOD), failure usually occurs within a very short time so there are many uncertainties about it and it is difficult for experimental instruments to monitor their dynamic response. Therefore, the dynamic response of the impact must be analysed by means of numerical simulation. But, there is a severe lack of the dynamic mechanical performance parameters of the structural materials involved. In this research, the first-class fan titanium alloy blade of a turbofan engine was used as a specimen to carry out the FOD test. The test results show that the crack damage has obvious morphological characteristics and narrow parameter range. Based on the results of the FOD test, the reverse identification of Johnson-Cook model parameters is used and the finite element model of the foreign object impacting blade is constructed. Finally, the dynamic response of the impact is analysed from the perspective of different strengths applied and contact forces, which further proves the scientific and engineering value of the model.
{"title":"The identification method of blade material parameters and dynamic response analysis of impact","authors":"Xu Yu, C. Ming, Liu Jing-yuan, Cheng Li","doi":"10.31534/engmod.2018.3.ri.07f","DOIUrl":"https://doi.org/10.31534/engmod.2018.3.ri.07f","url":null,"abstract":"Caused by the foreign object damage (FOD), failure usually occurs within a very short time so there are many uncertainties about it and it is difficult for experimental instruments to monitor their dynamic response. Therefore, the dynamic response of the impact must be analysed by means of numerical simulation. But, there is a severe lack of the dynamic mechanical performance parameters of the structural materials involved. In this research, the first-class fan titanium alloy blade of a turbofan engine was used as a specimen to carry out the FOD test. The test results show that the crack damage has obvious morphological characteristics and narrow parameter range. Based on the results of the FOD test, the reverse identification of Johnson-Cook model parameters is used and the finite element model of the foreign object impacting blade is constructed. Finally, the dynamic response of the impact is analysed from the perspective of different strengths applied and contact forces, which further proves the scientific and engineering value of the model.","PeriodicalId":35748,"journal":{"name":"International Journal for Engineering Modelling","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.31534/engmod.2018.3.ri.07f","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69996582","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 : 2019-01-01DOI: 10.31534/ENGMOD.2018.3.RI.03M
Jian Wang, A. Sha, Liqun Hu
ENGINEERING MODELLING 31 (2018) 3, 35-50 35 Modelling vibratory roller–soil system dynamics using discrete element method Jian Wang(1,2), Aimin Sha(3), Liqun Hu(3) (1) School of Highway, Chang'an University, Xi'an, Shannxi Province, CHINA e-mail: jianwang0712@gmail.com (2) School of Civil and Transportation Engineering, Henan University of Urban Construction, Pingdingshan, Henan, CHINA (3) Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an University, Xi'an, Shaanxi, CHINA
{"title":"Modelling vibratory roller–soil system dynamics using discrete element method","authors":"Jian Wang, A. Sha, Liqun Hu","doi":"10.31534/ENGMOD.2018.3.RI.03M","DOIUrl":"https://doi.org/10.31534/ENGMOD.2018.3.RI.03M","url":null,"abstract":"ENGINEERING MODELLING 31 (2018) 3, 35-50 35 Modelling vibratory roller–soil system dynamics using discrete element method Jian Wang(1,2), Aimin Sha(3), Liqun Hu(3) (1) School of Highway, Chang'an University, Xi'an, Shannxi Province, CHINA e-mail: jianwang0712@gmail.com (2) School of Civil and Transportation Engineering, Henan University of Urban Construction, Pingdingshan, Henan, CHINA (3) Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an University, Xi'an, Shaanxi, CHINA","PeriodicalId":35748,"journal":{"name":"International Journal for Engineering Modelling","volume":"92 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.31534/ENGMOD.2018.3.RI.03M","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69996496","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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