2022 International Conference on Dynamics and Vibroacoustics of Machines (DVM)最新文献_第2页

Features of Noise Emission from Various Types of Cooling Towers 不同类型冷却塔的噪声特征

2022 International Conference on Dynamics and Vibroacoustics of Machines (DVM) Pub Date : 2022-09-21 DOI: 10.1109/DVM55487.2022.9930913

V. Tupov, A. Mukhametov

{"title":"Features of Noise Emission from Various Types of Cooling Towers","authors":"V. Tupov, A. Mukhametov","doi":"10.1109/DVM55487.2022.9930913","DOIUrl":"https://doi.org/10.1109/DVM55487.2022.9930913","url":null,"abstract":"The article discusses the issues of noise impact of various types of cooling towers on the surrounding area. An analysis of the noise characteristics of counterflow natural draft cooling towers and dry fans cooling towers of steam turbine and steam-gas thermal power plants of various capacities is presented. The noise from natural draft counterflow cooling towers is due to the noise of falling water. The noise from dry fans cooling towers is due to the noise of the fans. In the Automated workplace Acoustics program, mathematical models of thermal power plants with counter-flow natural draft cooling towers and dry fans cooling towers were built and an acoustic calculation was performed. As a result of the calculations, the sound pressure levels were found at the border of the sanitary protection zone for octave bands from 31.5 up to 8000 Hz. The change in the excess of sanitary standards for the noise factor impact during the operation of the considered cooling towers, depending on the power of the station, is shown. It was found that for fans cooling towers the greatest excess of the maximum permissible sound pressure levels is observed at the low and middle part of the spectrum, and for counterflow cooling towers with natural circulation - in the high-frequency spectrum. The values of the required level reduction for different types of cooling towers have been determined. The required noise characteristics of dry cooling tower fans have been established, which provide the required noise level at the border of the sanitary protection zone. The article suggests possible measures to reduce the noise of “dry” fans of cooling towers when it is impossible to install “silent” fans.","PeriodicalId":227980,"journal":{"name":"2022 International Conference on Dynamics and Vibroacoustics of Machines (DVM)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125870496","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

Development of a Finite Element Models and Method for Determining Residual Stresses in the Workpiece after the End Milling Operation 建立了一种确定铣削后工件残余应力的有限元模型和方法

2022 International Conference on Dynamics and Vibroacoustics of Machines (DVM) Pub Date : 2022-09-21 DOI: 10.1109/DVM55487.2022.9930899

Dmitry Evdokimov, D. Skuratov, A. Bukatyj

引用次数: 0

Calculation of Noise Emission Caused by the Flow of the Body with Cavity Using Integral Acoustic Analogy 用积分声学类比计算带腔体流动引起的噪声发射

2022 International Conference on Dynamics and Vibroacoustics of Machines (DVM) Pub Date : 2022-09-21 DOI: 10.1109/DVM55487.2022.9930864

Kirill Pialov, Roman Slutsky, A. Maizel

引用次数: 0

Incremental forming slipway geometry measurement with using of a laser tracker 利用激光跟踪仪进行渐进式成形船台几何测量

2022 International Conference on Dynamics and Vibroacoustics of Machines (DVM) Pub Date : 2022-09-21 DOI: 10.1109/DVM55487.2022.9930918

N. Sazonnikova, Vladimir Iluhin, Dmitry Mezentsev, S. Surudin

{"title":"Incremental forming slipway geometry measurement with using of a laser tracker","authors":"N. Sazonnikova, Vladimir Iluhin, Dmitry Mezentsev, S. Surudin","doi":"10.1109/DVM55487.2022.9930918","DOIUrl":"https://doi.org/10.1109/DVM55487.2022.9930918","url":null,"abstract":"The technological equipment geometry control has a significant impact on the overall quality and performance of the product in many manufacturing processes such as multi-position assembly and stamping as well as on productivity and production costs. One of the most promising means of technology equipment geometry control in the digital economy condition is a laser tracker. The robotic incremental sheet forming process provides the necessary flexibility and profitability due to a very flexible tool chain. In this case, the trajectory of the universal tool is set using a processing program determined by the product geometry. The technological equipment geometry control of the robotic complex for incremental sheet forming was carried out in 2 stages. At the first stage, the measurements were carried out manually in the absolute range measuring system mode. At the second stage, a dynamic measurement of the blank plane displacement was carried out automatically in the interferometer mode during forming process. It was shown that the largest slipway deviation is more than 1 mm and it occurs in the direction of the main application of force, i.e. in the product manufacture depth. This value can have a serious impact on the manufacturing parts geometry accuracy. Based on the measurement results, it can be concluded that it is necessary to increase the frame rigidity, either by adding additional fasteners, or by using more rigid materials of its construction.","PeriodicalId":227980,"journal":{"name":"2022 International Conference on Dynamics and Vibroacoustics of Machines (DVM)","volume":"2010 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127353838","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

Operational Design of a Mandibular Implant in Soft Tissue Deficiency Conditions 软组织缺损下颌骨种植体的操作设计

2022 International Conference on Dynamics and Vibroacoustics of Machines (DVM) Pub Date : 2022-09-21 DOI: 10.1109/DVM55487.2022.9930889

Dmitry Evdokimov, A. Nikolaenko, Dmitry Fedorov, I. Bajrikov, A. Bukatyj, Stanislav Bukatyj

引用次数: 0

Simulation of a Combined Pneumomechanical Drive of a Multi-tool Revolver Head 多刀转轮机头气动联合驱动仿真研究

2022 International Conference on Dynamics and Vibroacoustics of Machines (DVM) Pub Date : 2022-09-21 DOI: 10.1109/DVM55487.2022.9930894

S. Prikhodko, V. Sidorenko, D. Korotych, G. Dolgov

引用次数: 0

Study of Angular Dependence of Sound Absorption Coefficient at the Fluid - Solid Interface 流固界面吸声系数的角依赖性研究

2022 International Conference on Dynamics and Vibroacoustics of Machines (DVM) Pub Date : 2022-09-21 DOI: 10.1109/DVM55487.2022.9930936

F. Legusha, Kirill Pialov, Georgiy Chizhov

引用次数: 0

Features of the Combustion Chamber Development for a Small-Sized Turbojet Engine 小型涡喷发动机燃烧室发展特点

2022 International Conference on Dynamics and Vibroacoustics of Machines (DVM) Pub Date : 2022-09-21 DOI: 10.1109/DVM55487.2022.9930930

Ankudimov V.V., Sychenkov V.A., Yousef W.M., Davydov N.V., Khaliulin R.R., Sychenkova A.V.

引用次数: 0

Research of Vibration Characteristics of Rotor Blades of Low-pressure Compressor of GTE DN80 GTE DN80低压压气机动叶振动特性研究

2022 International Conference on Dynamics and Vibroacoustics of Machines (DVM) Pub Date : 2022-09-21 DOI: 10.1109/DVM55487.2022.9930926

A. Prokofev, Arkadiy Chernyavskiy, D. Vorokh, S. Danilin, A. Danilin, A. Aksenov, Sergey Maksimovskiy

{"title":"Research of Vibration Characteristics of Rotor Blades of Low-pressure Compressor of GTE DN80","authors":"A. Prokofev, Arkadiy Chernyavskiy, D. Vorokh, S. Danilin, A. Danilin, A. Aksenov, Sergey Maksimovskiy","doi":"10.1109/DVM55487.2022.9930926","DOIUrl":"https://doi.org/10.1109/DVM55487.2022.9930926","url":null,"abstract":"Gas-turbine engines (GTE) are the basis of the modern power plants. At the facilities of PJSC “Gazprom”, gas-compressor units with gas-turbine engines DU80 and DN80 with a power of 25 MW manufactured by “Zorya-Mashproekt” company are used. These GTEs are characterized by a certain imperfection of the design and poor embodiment of the blade apparatus of the 3rd and 4th stages of the low-pressure compressor (LPC), which entails premature exit of the engines from operation and increased repair costs. Measuring device PRIZ-1 developed by Samara University is briefly described, which was used to research the vibration characteristics of the rotor blades of the 3rd and 4th stages of the LPC of GTE DN80 in the conditions of the test bench of PJSC “Tyumenskie Motorostroiteli”. The article presents the results of the performed non-contact measurements of the deformational state parameters of the 3rd and 4th blade stages of LPC of the GTE DN80: the static position of the blades; amplitudes of bending oscillations of the blades; gaps between the blade tips and the inner surface of the housing; amplitudes of torsional oscillations of the blades; changes in the twist angle of the blades. Examples of visualizations of the measured parameters are presented. The results of research of the vibration characteristics of LPC blades will be used in the process of design and technological works aimed at fine-tuning, increasing the reliability of the blade apparatus and increasing the overhaul life of the DN80 gas turbine engine.","PeriodicalId":227980,"journal":{"name":"2022 International Conference on Dynamics and Vibroacoustics of Machines (DVM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129929079","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

Experimental Investigation of the Effect of Coupling Misalignment of a Centrifugal Pump Unit on Its Vibration and Noise Characteristics 离心泵机组耦合不对中对其振动和噪声特性影响的实验研究

2022 International Conference on Dynamics and Vibroacoustics of Machines (DVM) Pub Date : 2022-09-21 DOI: 10.1109/DVM55487.2022.9930934

Laiko K.K., Lerner D.L., Khabarova D.F.

{"title":"Experimental Investigation of the Effect of Coupling Misalignment of a Centrifugal Pump Unit on Its Vibration and Noise Characteristics","authors":"Laiko K.K., Lerner D.L., Khabarova D.F.","doi":"10.1109/DVM55487.2022.9930934","DOIUrl":"https://doi.org/10.1109/DVM55487.2022.9930934","url":null,"abstract":"The article presents the results of a study of the effect of the coupling misalignment of the centrifugal pump unit on its sound power and vibration velocity of the rolling bearings. This research is a part of the major research devoted to studying the factors affecting the noise and vibration characteristics of pumps and compressors, which is conducted by Chelyabinsk Compressor Plant LLC in collaboration with the Department of Hydraulics and Hydraulic and Pneumatic Systems of South Ural State University. The relevance of the research is determined by the lack of clear standardized guidelines for ensuring the quality of alignment, and in some cases their obsolescence and the inability to meet the national standards or customer requirements. In research, a specialized laser alignment system equipped with software with its recommendations for misalignment tolerances was used to ensure the reliability of the alignment of the unit coupling. Sound power was evaluated in accordance with GOST R ISO 3744 and vibration velocity was evaluated in accordance with GOST ISO 10816–3 and GOST 32106. The results show that at a constant speed and power consumption of the pump unit, there are both the lower critical tolerance, at which further reduction of misalignment to zero values is unreasonable, and the upper critical tolerance, at which unpredictable vibration and noise occur. Upon that, the angular misalignment has the most significant influence on the vibration level.","PeriodicalId":227980,"journal":{"name":"2022 International Conference on Dynamics and Vibroacoustics of Machines (DVM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128220118","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