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SELECTING THE PARAMETERS OF THE REACTIVE SILENCER FOR EXHAUST VENTILATION SYSTEMS 排气通风系统反应式消声器参数的选择
Akustika Pub Date : 2019-11-01 DOI: 10.36336/akustika20193485
O. Plitsyna, T. Rogova
{"title":"SELECTING THE PARAMETERS OF THE REACTIVE SILENCER FOR EXHAUST VENTILATION SYSTEMS","authors":"O. Plitsyna, T. Rogova","doi":"10.36336/akustika20193485","DOIUrl":"https://doi.org/10.36336/akustika20193485","url":null,"abstract":"The silencer’s scheme in which the duct is divided by vertical bent partitions into ranges series of expansion chambers is presented. The silencer’s scheme parameters ensuring even noise reduction in a wide frequency range are calculated. Abilities of the reactive silencer in exhaust ventilation systems are shown.","PeriodicalId":42295,"journal":{"name":"Akustika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48091388","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}
引用次数: 7
ECOLOGY ACOUSTIC MINIMUM PRESSURE OF POLAR ROUTES FOR HEAVY AIRCRAFTS AND LIGHTER THAN AIR VEHICLES WITH NANO FILM SOLAR ELECTRO SYSTEMS 采用纳米薄膜太阳能电系统的重型飞机和轻型飞行器极地航线生态声学最小压力
Akustika Pub Date : 2019-11-01 DOI: 10.36336/akustika20193413
N. Kuprikov, L. Ponyaev, M. Kuprikov
{"title":"ECOLOGY ACOUSTIC MINIMUM PRESSURE OF POLAR ROUTES FOR HEAVY AIRCRAFTS AND LIGHTER THAN AIR VEHICLES WITH NANO FILM SOLAR ELECTRO SYSTEMS","authors":"N. Kuprikov, L. Ponyaev, M. Kuprikov","doi":"10.36336/akustika20193413","DOIUrl":"https://doi.org/10.36336/akustika20193413","url":null,"abstract":"The new future High Ecology Efficiency as Acoustic Minimum Pressure for Nature Safety of the new Regular Polar Routes will be more perspective for Trans Continental Air Transport Operations by ICAO/IATA International Law Regulations. The more shortly Cross Polar Flight for Long-Haul Aircrafts (LHA) Routes by leader Airlines Teams are request to find new Geometrical Layout of Aircraft Design Projections. The increase in the dimension of LHA came into conflict with modern Aviation Infrastructure and led to the search for alternative options for constructively layout circuit solutions with sound and vibration issues in order to deal with this contradiction. A structural-parametric analysis of the influence of Infrastructure Constraints in the basing of LHA on the choice of alternative options for fuselage layout was carried out. The new Body Plane LHA and Lighter-then-Air (LTA) Vehicles with cover of Nano Film Solar Electro Systems will be more innovation projections for Worldwide Security Polar Air Transportation with reduce CO Pollution and Noise level.","PeriodicalId":42295,"journal":{"name":"Akustika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45356293","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}
引用次数: 0
REGRESSION ANALYSIS OF THE COEFFICIENTS OF THE LOSS OF VIBRATIONAL ENERGY WHEN CALCULATING THE NOISE FROM OSSETIAN AND BORING MACHINES OSSETIAN和镗床噪声计算中振动能量损失系数的回归分析
Akustika Pub Date : 2019-11-01 DOI: 10.36336/akustika20193495
A. Shashurin, M. Goguadze, A. Chukarin
{"title":"REGRESSION ANALYSIS OF THE COEFFICIENTS OF THE LOSS OF VIBRATIONAL ENERGY WHEN CALCULATING THE NOISE FROM OSSETIAN AND BORING MACHINES","authors":"A. Shashurin, M. Goguadze, A. Chukarin","doi":"10.36336/akustika20193495","DOIUrl":"https://doi.org/10.36336/akustika20193495","url":null,"abstract":"The purpose of this analysis is to approximate the analytical dependences which allow to calculate the vibrational energy loss coefficient at any frequency when calculating the noise from the axle lathe and boring machines. A regression analysis was conducted using the method of least squares. The paper presents the results of the regression coefficient calculations. The dependences obtained allow us to determine the loss coefficient value not only at the geometric mean frequencies of the octave spectrum, but also at the natural frequencies of oscillations.","PeriodicalId":42295,"journal":{"name":"Akustika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44363600","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}
引用次数: 1
ACOUSTIC MODELING FOR THE TASKS OF HYGIENIC ASSESSMENT OF THE URBAN ENVIRONMENT 声学建模在城市环境卫生评价中的应用
Akustika Pub Date : 2019-11-01 DOI: 10.36336/akustika20193435
D. Koshurnikov
{"title":"ACOUSTIC MODELING FOR THE TASKS OF HYGIENIC ASSESSMENT OF THE URBAN ENVIRONMENT","authors":"D. Koshurnikov","doi":"10.36336/akustika20193435","DOIUrl":"https://doi.org/10.36336/akustika20193435","url":null,"abstract":"The current system of information-gathering and analyzing which involves environment objects is aimed to form the magnitude of data using software and hardware systems. At the same time, geographic information systems (GIS) are widely used for primary analysis and visualization of the hygienic assessments results, including the noise factor, for the tasks of assessing the risk to public health. In turn, there is currently no complete interaction of software products with GIS, which requires the development, application and implementation of additional mechanisms for the source data formation and their interpretation. The result of the software products interface is new magnitudes of data obtained with consideration to the multidimensional heterogeneous information interface. First of all, this optimization allows reducing labor and time resources spent on bringing information to the uniformity. At the same time, the interface of calculation programs with GIS allows you to perform investigated area zoning, to form vector layers of such zones, to select the share of the exposed population by crossing the thematic layers in the GIS and solve a number of other tasks.","PeriodicalId":42295,"journal":{"name":"Akustika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44674647","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}
引用次数: 1
AUTOMOBILE INTERNAL COMBUSTION ENGINE PRESSURE CHARGING AND GAS-GUIDE LOW FREQUENCY NOISE REDUCTION USING ACTIVE SOUND SOURCES 汽车内燃机增压与气体引导有源声源低频降噪
Akustika Pub Date : 2019-11-01 DOI: 10.36336/akustika201934118
A. Vasilyev
{"title":"AUTOMOBILE INTERNAL COMBUSTION ENGINE PRESSURE CHARGING AND GAS-GUIDE LOW FREQUENCY NOISE REDUCTION USING ACTIVE SOUND SOURCES","authors":"A. Vasilyev","doi":"10.36336/akustika201934118","DOIUrl":"https://doi.org/10.36336/akustika201934118","url":null,"abstract":"Pressure charging devices in different types of internal combustion engines is allowing to achieve a number of advantages: engine power and fuel effectiveness increasing, exhaust gases toxic reduction etc. Pressure charging systems may be classified by the different parameters. For the time being turbo-supercharger is the most popular unit of serial automobile engines pressure charging. But it has some negative properties. Therefore using of dynamic (acoustic) pressure charging devices is promising solution. Analysis of existing acoustic pressure charging systems is carried out. The perspectives of using of active sound emitters for acoustic pressure charging are described. Theoretical issues of automobile engines active acoustic charging are discussed. Construction of active charging system is suggested. Multifunctional approach to automobile internal combustion engines pressure charging and low frequency intake and exhaust noise reduction is suggested. The results described in this paper may be useful for further development and application of internal combustion engines with improved consumer’s and ecological characteristic.","PeriodicalId":42295,"journal":{"name":"Akustika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44393528","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}
引用次数: 13
NUMERIC ANALYSIS OF VIBRATION IMPACT OF SUBWAY ON MULTI-STOREY BUILDING 地铁对多层建筑振动冲击的数值分析
Akustika Pub Date : 2019-11-01 DOI: 10.36336/akustika20193459
L. Pastukhova, V. Alekhin, S. Gorodilov, A. Sekacheva
{"title":"NUMERIC ANALYSIS OF VIBRATION IMPACT OF SUBWAY ON MULTI-STOREY BUILDING","authors":"L. Pastukhova, V. Alekhin, S. Gorodilov, A. Sekacheva","doi":"10.36336/akustika20193459","DOIUrl":"https://doi.org/10.36336/akustika20193459","url":null,"abstract":"The authors carried out the numerical analysis of vibration impact of subway on the multistory residential building. Supposed building site is situated in Yekaterinburg and placed above the subway line tunnels in the middle of the track between the stations. The analysis is aimed to simulate the initiation of vibration during the period when the train passes, to assess the impact of availability of vibration-damping layer on this process, and also to obtain values of vibrational accelerations in order to predict vibration levels and volumes of sound in reference points in living spaces.","PeriodicalId":42295,"journal":{"name":"Akustika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44143189","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}
引用次数: 0
CALCULATION OF IMPULSE NOISE WITH MIRROR-DIFUSE REFLECTION OF SOUND FROM FENCES 栅栏声镜面扩散反射脉冲噪声的计算
Akustika Pub Date : 2019-11-01 DOI: 10.36336/akustika20193488
A. Antonov, I. Matveeva, I. Shubin, I. Tsukernikov
{"title":"CALCULATION OF IMPULSE NOISE WITH MIRROR-DIFUSE REFLECTION OF SOUND FROM FENCES","authors":"A. Antonov, I. Matveeva, I. Shubin, I. Tsukernikov","doi":"10.36336/akustika20193488","DOIUrl":"https://doi.org/10.36336/akustika20193488","url":null,"abstract":"The choice and acoustic efficiency of construction and acoustic means of noise control is determined on the basis of calculations of changes in the spatio-temporal characteristics of the pulses of sound energy emitted by the sound source. The paper proposes a combined computational model for estimating the energy characteristics of pulse noise and their spatiotemporal changes. The model describes the formation and distribution of the reflected sound energy of pulses in the mirror-scattered reflection of sound from the fences. The principles of construction of the computational model and the computer program implementing it are stated. Evaluation of the computational model is performed by comparative analysis of experimental and computational data obtained by the action of a pulsed noise source in complex geometrically shaped rooms. It is found that the calculated graphs of the decay of the reflected pulse energy in time coincide with the experimentally determined declines.","PeriodicalId":42295,"journal":{"name":"Akustika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43877331","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}
引用次数: 1
EXPERIMENTAL STUDIES ON THE NOISE AND VIBRATION OF A SPECIAL BORING MACHINE DUE TO FORMATION OF THE OPERATOR´S WORKPLACE SOUND FIELD 特种镗床噪声和振动的实验研究
Akustika Pub Date : 2019-11-01 DOI: 10.36336/akustika201934100
A. Shashurin, M. Goguadze, Anna Lubianchenko
{"title":"EXPERIMENTAL STUDIES ON THE NOISE AND VIBRATION OF A SPECIAL BORING MACHINE DUE TO FORMATION OF THE OPERATOR´S WORKPLACE SOUND FIELD","authors":"A. Shashurin, M. Goguadze, Anna Lubianchenko","doi":"10.36336/akustika201934100","DOIUrl":"https://doi.org/10.36336/akustika201934100","url":null,"abstract":"The purpose of this study is to measure the octave sound pressure levels and vibrations of a boring machine. A theoretical analysis of the sound pressure levels near the boring machine is performed. The measurement results are given. It was found that the workplace sound pressure levels exceed the sanitary standards, which suggests that the excessive noise levels are due to the exposure to the cutter sound radiation and the axis being machined.","PeriodicalId":42295,"journal":{"name":"Akustika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49053976","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}
引用次数: 3
SOUND ABSORPTION OF SOUND SUPRESSING LIGHTWEIGHT STRUCTURED PANELS 轻质结构吸声板的吸声性能
Akustika Pub Date : 2019-11-01 DOI: 10.36336/akustika20193440
V. Murzinov, P. Murzinov, Sergey Popov, Julia Taratinova
{"title":"SOUND ABSORPTION OF SOUND SUPRESSING LIGHTWEIGHT STRUCTURED PANELS","authors":"V. Murzinov, P. Murzinov, Sergey Popov, Julia Taratinova","doi":"10.36336/akustika20193440","DOIUrl":"https://doi.org/10.36336/akustika20193440","url":null,"abstract":"Description of the effective soundproofing panel is presented. For this panel, the ratio of acoustic characteristics and surface density exceeds many modern sound insulation and sound absorbing materials and structures. This article is devoted to modeling the sound absorption coefficient of the soundproof panel. The article presents formulas for determining the coefficient of sound absorption. Construction of a sound suppressed lightweight structured panel (SSLSP) developed by the authors is shown. Comparison of the effectiveness of the SSLSP panel and modern sound-proof materials is shown.","PeriodicalId":42295,"journal":{"name":"Akustika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48458535","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}
引用次数: 0
ON IMPROVEMENT OF THE IMPEDANCE EDUCATION ACCURACE BY ACCOUNT OF IMPEDANCE VARIABILITY ALONG THE ACOUSTIC LINER 利用声线阻抗变化提高阻抗教育的准确性
Akustika Pub Date : 2019-11-01 DOI: 10.36336/akustika20193448
V. Palchikovskiy, V. Pavlogradskiy, A. Kuznetsov, R. Bulbovich
{"title":"ON IMPROVEMENT OF THE IMPEDANCE EDUCATION ACCURACE BY ACCOUNT OF IMPEDANCE VARIABILITY ALONG THE ACOUSTIC LINER","authors":"V. Palchikovskiy, V. Pavlogradskiy, A. Kuznetsov, R. Bulbovich","doi":"10.36336/akustika20193448","DOIUrl":"https://doi.org/10.36336/akustika20193448","url":null,"abstract":"An impedance eduction method considering impedance variability along the acoustic liner is proposed. Impedance eduction is based on minimization of the residual functional, which is the discrepancy between the experimental and computed values of acoustic pressure at the interferometer microphones. The computed values are obtained by solving the Helmholtz equation, convected Helmholtz equation and linearized Navier-Stokes equations for a two-dimensional duct with an impedance wall and flow based on finite-element method. The cases of constant and variable impedance along the liner sample are considered. It is established that when taking into account the variable impedance, the residual functional decreases more than twofold against the case of constant impedance.","PeriodicalId":42295,"journal":{"name":"Akustika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44585863","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}
引用次数: 0
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