Sound and Vibration最新文献_第2页

Vibration Control of Vertical Turbine Pump by Optimization of Vane Pitch Tolerances of an Impeller Using Statistical Techniques 基于统计技术优化叶轮桨距公差的立式涡轮泵振动控制

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Sound and Vibration Pub Date : 2021-01-01 DOI: 10.32604/sv.2021.017000

Ravindra S. Birajdar, A. Keste, S. Gawande

引用次数: 0

Dynamic Modeling of the Feed Drive System of a CNC Metal Cutting Machine 数控金属切割机进给驱动系统的动力学建模

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Sound and Vibration Pub Date : 2021-01-01 DOI: 10.32604/SV.2021.04410

H. Heydarnia, I. Kiselev, M. M. Ermolaev, S. Nikolaev

{"title":"Dynamic Modeling of the Feed Drive System of a CNC Metal Cutting Machine","authors":"H. Heydarnia, I. Kiselev, M. M. Ermolaev, S. Nikolaev","doi":"10.32604/SV.2021.04410","DOIUrl":"https://doi.org/10.32604/SV.2021.04410","url":null,"abstract":"Studying the vibrational behavior of feed drive systems is important for enhancing the structural performance of computer numerical control (CNC) machines. The preload on the screw and nut position have a great influence on the vibration characteristics of the feed drive as two very important operational conditions. Rotational acceleration of the screw also affects the performance of the CNC feed drive when machining small parts. This paper investigates the influence of preload and nut position on the vibration characteristics of the feed drive system of a CNC metal cutting machine in order to be able to eliminate an observed resonance occurred at high rotational speeds of the screw, corresponding to high feed rates. Additionally, rational structural parameters of the feed drive system are selected in order to increase the rotational acceleration for improving the performance of the CNC machine. Experiments and analyses showed that by selecting specific parameters of feed drive system and simultaneously applying a certain value of preload, a 97% increase in rotational acceleration and 30% time reduction considering the vibration resistance at high rotational speeds can be achieved.","PeriodicalId":49496,"journal":{"name":"Sound and Vibration","volume":"12 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81783109","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

Static and Dynamic Analyses of Spliced Column 拼接柱的静力与动力分析

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Sound and Vibration Pub Date : 2021-01-01 DOI: 10.32604/sv.2021.011627

Deepak Kumar Singh

{"title":"Static and Dynamic Analyses of Spliced Column","authors":"Deepak Kumar Singh","doi":"10.32604/sv.2021.011627","DOIUrl":"https://doi.org/10.32604/sv.2021.011627","url":null,"abstract":"The analysis of spliced column has been carried out to detect optimum location of providing splices in the column. In the present work, static and dynamic (free vibration) analyses of spliced column have been done by randomising the location of splicing. A symmetrical four storey steel framed building has been modelled, analysed and designed for loads (dead, live and earthquake loads) recommended by Indian Codal provisions using Staad.Pro. The critical column at each floor level is identified based on axial force (AF), bending moment (BM) and shear force (SF). The total 16 models of spliced columns have been designed and then modelled in a 3D CAD Design tool (SOLIDWORKS) and then imported in the finite element tool (ANSYSWorkbench 14.0) for detailed analysis. The variation of stress, strain and deflection of the spliced column are shown in the form of contour. Further, the modal analysis is performed to determine the natural frequencies. The results of static and dynamic analyses are compared for each modelled spliced column to obtain the optimum location for providing splices in the column. The dynamic analysis of spliced column is of utmost importance in the region where dynamic loadings like earthquake, cyclones etc. are more frequent, and mere static analysis does not account for the safety of the structure. This study will help the engineers to select directly the optimum size and location of the splices in the column of a steel framed building.","PeriodicalId":49496,"journal":{"name":"Sound and Vibration","volume":"20 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81929065","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

Modal Control of Cantilever Beam Using a Gyrostabilizer 基于陀螺稳定器的悬臂梁模态控制

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Sound and Vibration Pub Date : 2021-01-01 DOI: 10.32604/sv.2021.015705

O. Çuvalci, F. Ünker, Turgut Batuhan Baturalp, Utku Gülbulak, A. Ertas

引用次数: 1

Manipulating Chladni Patterns of Ferromagnetic Materials by an External Magnetic Field 利用外磁场操纵铁磁材料的克拉尼模式

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Sound and Vibration Pub Date : 2021-01-01 DOI: 10.32604/sv.2021.015008

Kenneth R. Podolak, Vihan A.W. Wickramasinghe, Gareth A. Mansfield, Alex M. Tuller

引用次数: 0

Experimental Modal Damping Identification of a Mechanical Structure Using Video Magnification Technique 基于视频放大技术的机械结构模态阻尼试验识别

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Sound and Vibration Pub Date : 2021-01-01 DOI: 10.32604/sv.2021.015293

J. Hallal, M. Fakih, H. Damerji, M. Hammoud, Mehdi Chouman

引用次数: 0

Reducing Occupational Noise Propagated from Centrifugal Fan through Dissipative Silencers: A Field Study 利用耗散消声器降低离心式通风机职业性噪声的现场研究

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Sound and Vibration Pub Date : 2021-01-01 DOI: 10.32604/SV.2021.08930

A. Variani, Masoumeh Ghorbanide, S. Zare, Saeid Ahmadi, Zahra Hashemi

{"title":"Reducing Occupational Noise Propagated from Centrifugal Fan through Dissipative Silencers: A Field Study","authors":"A. Variani, Masoumeh Ghorbanide, S. Zare, Saeid Ahmadi, Zahra Hashemi","doi":"10.32604/SV.2021.08930","DOIUrl":"https://doi.org/10.32604/SV.2021.08930","url":null,"abstract":"Acoustic performance of dissipative silencer was evaluated to determine the effectiveness of perforated duct porosity and absorbent material density in reducing occupational noise exposure propagated from centrifugal fan. Design charts were applied to predict noise reduction and length of a dissipative silencer. Dissipative silencers with various punched duct porosity (14%, 30% and 40%) and sound absorbent density (80 Kg/m, 120 Kg/m, and 140 Kg/m) were designed and fabricated. According to ISO9612 and ISO11820, noise level was measured before and after installing all nine test silencers at fixed workstations around the discharge side of a centrifugal fan in a manufacturing plant. On average, the noise level at the discharge side of a fan without silencer was measured to be 93.6 dBA, whereas it was significantly mitigated by 67.4 dBA to 70.1 dBA after installing all silencers. Dynamic insertion loss for a dissipative silencer with 100 cm length was predicted to be 27.9 dB, which was in agreement with experimental ones. Although, there was no significant differences between insertion loss of silencers, the one with 30% porosity and 120 Kg/m rock wool density had the highest insertion loss of 26.2 dBA. Dissipative silencers noticeably reduced centrifugal fan noise exposures. Increasing sound absorbent density and duct porosity up to a certain limit could probably be effective in noise reduction of dissipative silencers.","PeriodicalId":49496,"journal":{"name":"Sound and Vibration","volume":"7 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86830245","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

Prediction and Limitations of Noise Maps Developed for Heterogeneous Urban Road Traffic Condition: A Case Study of Surat City, India 非均匀城市道路交通状况噪音地图的预测与限制:以印度苏拉特市为例

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Sound and Vibration Pub Date : 2021-01-01 DOI: 10.32604/SV.2021.010715

Dipeshkumar R. Sonaviya, B. Tandel

{"title":"Prediction and Limitations of Noise Maps Developed for Heterogeneous Urban Road Traffic Condition: A Case Study of Surat City, India","authors":"Dipeshkumar R. Sonaviya, B. Tandel","doi":"10.32604/SV.2021.010715","DOIUrl":"https://doi.org/10.32604/SV.2021.010715","url":null,"abstract":"Road traffic noise pollution has been recognized as a serious issue which affects human health as well as affects urban regions. Noise maps are very beneficial to identify the impact of noise pollution. A noise mapping study performed to study the propagation of noise in tier-II city along with field measurements. The noise maps are developed using a computer simulation model (SoundPLAN essential 4.0 software). The noise prediction models like U.K’s CoRTN, Germany’s RLS-90, and their modified versions, which can be used for homogenous road traffic conditions, cannot be successfully applied in heterogeneous road traffic conditions of India. In developing country like India, road traffic noise pollution depends on the composition of heterogeneous traffic volume, variance in road geometrical, honking conditions, un-authorized parking, and varying density of the building on either side of the road. These traffic compositions contain vehicles, which have different sizes, speeds variations, a different dimension of vehicles. Because of fluctuating speeds, lack of lane disciplines, and un-authorized parking on main road lanes, honking events becomes inevitable, which changes and affects the urban soundscape of nations like India. Analysis of noise maps showed that horn honking due to un-authorized parked vehicles contributed an additional increase up to 11 dB (A) noise, which is quite significant.","PeriodicalId":49496,"journal":{"name":"Sound and Vibration","volume":"1 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83562006","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: 2

Duffing Oscillator’s Vibration Control under Resonance with a Negative Velocity Feedback Control and Time Delay 带负速度反馈和时滞的Duffing振荡器共振振动控制

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Sound and Vibration Pub Date : 2021-01-01 DOI: 10.32604/sv.2021.014358

Y. A. Amer, Taher A. Bahnasy

引用次数: 0

Prioritizing and Providing Sound Pollution Control Strategies at the CPF of North Azadegan Oilfield Project 北阿扎德干油田CPF项目声污染控制策略的优选与实施

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Sound and Vibration Pub Date : 2021-01-01 DOI: 10.32604/sv.2021.016662

A. Askari, A. Salehi Sahl Abadi, Alimardan Alinia, M. Pourjaafar, Aref Honairi Haghighi, Elham Akhlaghi Pirposhteh

引用次数: 1