Pub Date : 2021-01-01DOI: 10.36336/akustika20214122
A. Shvetsov, Viktor Gromov
The high noise level in modern airports is one of the causes that affect the occurrence of accidents involving airliners and ground vehicles operating at the airport. In this study, an emergency prevention algorithm has been developed aiming at reducing the probability of an emergency collision of an airliner and a land vehicle by separating the noise generated during the airport operation into the noise that warns the pilot (operator) about the threat of an emergency collision and the noise that contributes to the accident initiation. The results of the study can be used in the development of new methods and technical means aimed at preventing accidents at airports.
{"title":"ANALYSIS OF THE AIRPORT NOISE IMPACT ON THE OCCURRENCE OF EMERGENCY SITUATIONS","authors":"A. Shvetsov, Viktor Gromov","doi":"10.36336/akustika20214122","DOIUrl":"https://doi.org/10.36336/akustika20214122","url":null,"abstract":"The high noise level in modern airports is one of the causes that affect the occurrence of accidents involving airliners and ground vehicles operating at the airport. In this study, an emergency prevention algorithm has been developed aiming at reducing the probability of an emergency collision of an airliner and a land vehicle by separating the noise generated during the airport operation into the noise that warns the pilot (operator) about the threat of an emergency collision and the noise that contributes to the accident initiation. The results of the study can be used in the development of new methods and technical means aimed at preventing accidents at airports.","PeriodicalId":42295,"journal":{"name":"Akustika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70176028","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 : 2021-01-01DOI: 10.36336/akustika20214145
A. Antonov, I. Matveeva, I. Shubin, I. Tsukernikov
At modern manufacturing enterprises, machines and mechanisms that emit pulsed noise are widely used. Pulse noise has a more harmful effect on workers than time-constant, time fluctuating and intermittent noises. Pulse noise reduction is possible through the application of design changes in the pulse noise source and the development of organizational, technological, construction and acoustic measures. The choice of specific events is made on the basis of their acoustic efficiency assessment. For this purpose, it is necessary to have a method for calculating pulse noise that takes into account its space-time characteristics and their possible changes with structural changes of the source, as well as with changes in the space-planning and acoustic parameters of premises. In the article, to assess the acoustic efficiency of pulse noise, it is proposed to use a combined calculation method developed by the authors, taking into account the real mirror-diffuse nature of sound reflection from the room fences. On its basis, it is analyzed the possibilities of using various methods and means to reduce the impact of noise on the workers in rooms with pulsed sound sources.
{"title":"CALCULATIONS FOR EVALUATING THE ACOUSTIC EFFICIENCY OF MEASURES TO REDUCE PULSE NOISE IN INDUSTRIAL PREMISES","authors":"A. Antonov, I. Matveeva, I. Shubin, I. Tsukernikov","doi":"10.36336/akustika20214145","DOIUrl":"https://doi.org/10.36336/akustika20214145","url":null,"abstract":"At modern manufacturing enterprises, machines and mechanisms that emit pulsed noise are widely used. Pulse noise has a more harmful effect on workers than time-constant, time fluctuating and intermittent noises. Pulse noise reduction is possible through the application of design changes in the pulse noise source and the development of organizational, technological, construction and acoustic measures. The choice of specific events is made on the basis of their acoustic efficiency assessment. For this purpose, it is necessary to have a method for calculating pulse noise that takes into account its space-time characteristics and their possible changes with structural changes of the source, as well as with changes in the space-planning and acoustic parameters of premises. In the article, to assess the acoustic efficiency of pulse noise, it is proposed to use a combined calculation method developed by the authors, taking into account the real mirror-diffuse nature of sound reflection from the room fences. On its basis, it is analyzed the possibilities of using various methods and means to reduce the impact of noise on the workers in rooms with pulsed sound sources.","PeriodicalId":42295,"journal":{"name":"Akustika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70176792","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 : 2021-01-01DOI: 10.36336/akustika202141100
S. Timushev, A. Yakovlev, P. Moshkov
The problem of simulation the noise generated during the operation of the propeller is considered. Calculation methods are described and numerical simulation of the noise of a light aircraft propeller by the acoustic-vortex method is performed. The results of numerical modeling of the tonal components of the propeller noise when operating under static conditions are compared with experimental data and calculation results based on a semiempirical model.
{"title":"NUMERICAL SIMULATION OF THE LIGHT AIRCRAFT PROPELLER NOISE UNDER STATIC CONDITION","authors":"S. Timushev, A. Yakovlev, P. Moshkov","doi":"10.36336/akustika202141100","DOIUrl":"https://doi.org/10.36336/akustika202141100","url":null,"abstract":"The problem of simulation the noise generated during the operation of the propeller is considered. Calculation methods are described and numerical simulation of the noise of a light aircraft propeller by the acoustic-vortex method is performed. The results of numerical modeling of the tonal components of the propeller noise when operating under static conditions are compared with experimental data and calculation results based on a semiempirical model.","PeriodicalId":42295,"journal":{"name":"Akustika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70174889","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 : 2021-01-01DOI: 10.36336/akustika202141107
Aleksandr J. Krasnov, I. Deryabin
This article includes the results of experimental investigations of patterned noise-reducing materials and components, carried out using special-purpose laboratory-scale bench plants (Alpha Cabin, Torre di Pisa, RTC-3, Oberst). Illustrative examples of constructive-technological structurization of the components (gaskets, panels and upholstery) providing noise reduction of passenger cars are given.
本文包括使用专用实验室规模的实验工厂(Alpha Cabin, Torre di Pisa, RTC-3, Oberst)进行的图案降噪材料和组件的实验研究结果。给出了乘用车降噪部件(垫片、面板和内饰)的构造-技术结构的实例。
{"title":"PRACTICAL METHODS OF ACOUSTIC MATERIALS PATTERNING FOR INCREASE OF THEIR EFFECTIVENESS","authors":"Aleksandr J. Krasnov, I. Deryabin","doi":"10.36336/akustika202141107","DOIUrl":"https://doi.org/10.36336/akustika202141107","url":null,"abstract":"This article includes the results of experimental investigations of patterned noise-reducing materials and components, carried out using special-purpose laboratory-scale bench plants (Alpha Cabin, Torre di Pisa, RTC-3, Oberst). Illustrative examples of constructive-technological structurization of the components (gaskets, panels and upholstery) providing noise reduction of passenger cars are given.","PeriodicalId":42295,"journal":{"name":"Akustika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70175046","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 : 2021-01-01DOI: 10.36336/akustika20214113
V. Krutova
Despite the very large difference in lifting capacity, bridge cranes have an almost identical vibration control system layout, which predetermines the general approach to the theoretical assessment of vibration and noise spectra both in the production premises and at the crane operator's workplace. The bridge crane is characterized by potential danger for not only operators but also production personnel located in the crane area within the production workshop during its operation. The safe operating conditions of cranes are determined by not only their technical condition but also the crane operator fatigue, which, in turn, is caused mainly by the impact of increased noise and vibration.
{"title":"DERIVING THE DEPENDENCIES FOR THE VIBRATING CAPACITY INTRODUCED INTO WHEELSET ASSEMBLIES","authors":"V. Krutova","doi":"10.36336/akustika20214113","DOIUrl":"https://doi.org/10.36336/akustika20214113","url":null,"abstract":"Despite the very large difference in lifting capacity, bridge cranes have an almost identical vibration control system layout, which predetermines the general approach to the theoretical assessment of vibration and noise spectra both in the production premises and at the crane operator's workplace. The bridge crane is characterized by potential danger for not only operators but also production personnel located in the crane area within the production workshop during its operation. The safe operating conditions of cranes are determined by not only their technical condition but also the crane operator fatigue, which, in turn, is caused mainly by the impact of increased noise and vibration.","PeriodicalId":42295,"journal":{"name":"Akustika","volume":"46 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70175189","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 : 2021-01-01DOI: 10.36336/akustika202141183
Dmitry Ruslyakov
In contrast to metal-cutting machines, woodworking machines are characterized not only by sound pressure levels at the operators’ workplaces that exceed the sanitary standards, but also by dust concentrations that also exceed the standards. At present, a set of theoretical and experimental studies has been carried out and engineering solutions have been proposed to bring vibroacoustic characteristics and dustiness to the sanitary standards for woodworking thickness-jointing machines, band and circular saw machines, model and contour-milling machines. Studies of this kind in relation to woodworking drilling machines have not been done. It should be noted that not only the layout of woodworking drilling machines, but also the dynamics of the drilling process has significant differences from the above mentioned machines.
{"title":"THEORETICAL STUDY OF NOISE GENERATION DURING DRILLING OF WOOD WORKPIECES WITH REGARD TO THE DRILL FEED RATE","authors":"Dmitry Ruslyakov","doi":"10.36336/akustika202141183","DOIUrl":"https://doi.org/10.36336/akustika202141183","url":null,"abstract":"In contrast to metal-cutting machines, woodworking machines are characterized not only by sound pressure levels at the operators’ workplaces that exceed the sanitary standards, but also by dust concentrations that also exceed the standards. At present, a set of theoretical and experimental studies has been carried out and engineering solutions have been proposed to bring vibroacoustic characteristics and dustiness to the sanitary standards for woodworking thickness-jointing machines, band and circular saw machines, model and contour-milling machines. Studies of this kind in relation to woodworking drilling machines have not been done. It should be noted that not only the layout of woodworking drilling machines, but also the dynamics of the drilling process has significant differences from the above mentioned machines.","PeriodicalId":42295,"journal":{"name":"Akustika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70175455","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 : 2021-01-01DOI: 10.36336/akustika202141168
Nikolay Akhremenko, Yasemin Durukan, E. Popkova, M. Shevelko
The paper discusses the principles of the occurrence of inherent noise of the sensitive element of the angular velocity sensor, the calculation of these noises and methods of their reduction. The principle of operation of the sensing element of the angular velocity sensor on bulk acoustic waves, which consists in detecting the rotation of the polarization vector of the emitted linearly polarized shear wave, is presented in the work. The results of calculations of the noise level for various materials and sizes of plate piezoelectric transducers and acoustic duct are presented in the work. It is shown that a sensitive element with plate piezoelectric transducers made of langasite and an acoustic duct made of glass, a heavy flint, has a minimum noise level. It is shown that with an increase in the operating frequency of a plate piezoelectric transducer, the noise level decreases. A program for calculating the noise characteristics of solid-state angular velocity sensors based on bulk acoustic waves has been developed. The element base of the receiving amplifier of the device has been selected. Recommendations for reducing the level of noise are formulated, such as: increasing the operating frequency and reducing the bandwidth of plate piezoelectric transducers, as well as the choice of optimal materials for both piezoelectric transducers and acoustic duсt.
{"title":"THE SENSITIVITY ESTIMATION FOR THE ULTRASONIC ANGULAR VELOCITY SENSORS","authors":"Nikolay Akhremenko, Yasemin Durukan, E. Popkova, M. Shevelko","doi":"10.36336/akustika202141168","DOIUrl":"https://doi.org/10.36336/akustika202141168","url":null,"abstract":"The paper discusses the principles of the occurrence of inherent noise of the sensitive element of the angular velocity sensor, the calculation of these noises and methods of their reduction. The principle of operation of the sensing element of the angular velocity sensor on bulk acoustic waves, which consists in detecting the rotation of the polarization vector of the emitted linearly polarized shear wave, is presented in the work. The results of calculations of the noise level for various materials and sizes of plate piezoelectric transducers and acoustic duct are presented in the work. It is shown that a sensitive element with plate piezoelectric transducers made of langasite and an acoustic duct made of glass, a heavy flint, has a minimum noise level. It is shown that with an increase in the operating frequency of a plate piezoelectric transducer, the noise level decreases. A program for calculating the noise characteristics of solid-state angular velocity sensors based on bulk acoustic waves has been developed. The element base of the receiving amplifier of the device has been selected. Recommendations for reducing the level of noise are formulated, such as: increasing the operating frequency and reducing the bandwidth of plate piezoelectric transducers, as well as the choice of optimal materials for both piezoelectric transducers and acoustic duсt.","PeriodicalId":42295,"journal":{"name":"Akustika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70175774","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 : 2021-01-01DOI: 10.36336/akustika202141210
N. Ivanov, A. Shashurin, A. Burakov
The features of noise generation processes in exhaust and suction noise silencers are shown. A method for testing silencers has been developed. The classification of the main structural elements of exhaust and suction noise silencers, depending on the purpose, is proposed. Experimental studies of the relationship between the acoustic efficiency and the back pressure of silencers from the structural design of the elements are performed. The factors influencing the efficiency in the low-frequency and high-frequency regions of the spectrum are determined: the volume of silencers, the number of chambers, perforation, sound absorption, flow ejection, etc. Recommendations for the design of noise silencers are proposed.
{"title":"DETERMINATION OF THE INFLUENCE OF STRUCTURAL ELEMENTS ON ACOUSTIC EFFICIENCY AND BACK PRESSURE IN EXHAUST AND SUCTION NOISE SILENCERS","authors":"N. Ivanov, A. Shashurin, A. Burakov","doi":"10.36336/akustika202141210","DOIUrl":"https://doi.org/10.36336/akustika202141210","url":null,"abstract":"The features of noise generation processes in exhaust and suction noise silencers are shown. A method for testing silencers has been developed. The classification of the main structural elements of exhaust and suction noise silencers, depending on the purpose, is proposed. Experimental studies of the relationship between the acoustic efficiency and the back pressure of silencers from the structural design of the elements are performed. The factors influencing the efficiency in the low-frequency and high-frequency regions of the spectrum are determined: the volume of silencers, the number of chambers, perforation, sound absorption, flow ejection, etc. Recommendations for the design of noise silencers are proposed.","PeriodicalId":42295,"journal":{"name":"Akustika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70176307","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 : 2021-01-01DOI: 10.36336/akustika2021414
V. Krutova, B. Meskhi
The load-bearing frames of the technological machinery of various functional purposes, such as bridge and gantry cranes, locomotives, motor locomotives, etc., are energetically closed rod systems [1-10].
各种功能用途的工艺机械，如桥式龙门起重机、机车、机动机车等的承重架，均为能量封闭杆系[1-10]。
{"title":"VIBRATIONS OF THE CLOSED FRAME STRUCTURES IN A STEADY-STATE CONDITION","authors":"V. Krutova, B. Meskhi","doi":"10.36336/akustika2021414","DOIUrl":"https://doi.org/10.36336/akustika2021414","url":null,"abstract":"The load-bearing frames of the technological machinery of various functional purposes, such as bridge and gantry cranes, locomotives, motor locomotives, etc., are energetically closed rod systems [1-10].","PeriodicalId":42295,"journal":{"name":"Akustika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70176820","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 : 2021-01-01DOI: 10.36336/akustika2021408
P. Marková, V. Krivanek, Blanka Hablovicova, J. Frič
The article is focused on the measurements of different types of “environmental” built noise barriers (semi-vegetation, green belt, barriers with vegetation) which were measured in the different places in the Czech Republic. In situ measuring was carried out in accordance with the standard ISO 1996. Short-term synchronous measurements were carried out in front of and behind the noise barrier and the effectiveness of noise barriers was determined. The measurement results show a slight increase in acute attenuation in anti-noise elements using vegetation. During the growing season, when greening occurs, a more pronounced acoustic attenuation compared to dormancy has been clearly demonstrated. This research was supported by the Ministry of Transport of the Czech Republic.
{"title":"EVALUATION OF NOISE ATTENUATION OF BARRIERS WITH GREENERY IN THE CZECH REPUBLIC","authors":"P. Marková, V. Krivanek, Blanka Hablovicova, J. Frič","doi":"10.36336/akustika2021408","DOIUrl":"https://doi.org/10.36336/akustika2021408","url":null,"abstract":"The article is focused on the measurements of different types of “environmental” built noise barriers (semi-vegetation, green belt, barriers with vegetation) which were measured in the different places in the Czech Republic. In situ measuring was carried out in accordance with the standard ISO 1996. Short-term synchronous measurements were carried out in front of and behind the noise barrier and the effectiveness of noise barriers was determined. The measurement results show a slight increase in acute attenuation in anti-noise elements using vegetation. During the growing season, when greening occurs, a more pronounced acoustic attenuation compared to dormancy has been clearly demonstrated. This research was supported by the Ministry of Transport of the Czech Republic.","PeriodicalId":42295,"journal":{"name":"Akustika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70174745","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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