International Journal of Acoustics and Vibration最新文献

A Novel Degradation Feature Extraction Technique Based on Improved Base-Scale Entropy 一种基于改进基尺度熵的退化特征提取方法

IF 1 4区工程技术

International Journal of Acoustics and Vibration Pub Date : 2021-03-30 DOI: 10.20855/IJAV.2020.25.11717

Z. Chen, Changzhuan Shao, Xiong Hu, Bing Wang, Daobing Zhang, Xiaomei Tao

引用次数: 1

Application of Statistical Energy Analysis (SEA) in Estimating Acoustic Response of Panels With Non-Uniform Mass Distribution 统计能量分析（SEA）在非均匀质量分布面板声学响应估计中的应用

IF 1 4区工程技术

International Journal of Acoustics and Vibration Pub Date : 2021-03-30 DOI: 10.20855/IJAV.2020.25.11736

K. Renji

引用次数: 2

Surge Motion Passive Control of TLP with Double Horizontal Tuned Mass Dampers 双水平调谐质量阻尼器TLP的喘振被动控制

IF 1 4区工程技术

International Journal of Acoustics and Vibration Pub Date : 2021-03-30 DOI: 10.20855/IJAV.2020.25.11273

M. R. Tabeshpour, Ebrahim Malayjerdi

引用次数: 0

Experimental and Numerical Investigation on the Flow-Induced Interior Noise Based on Pellicular Analysis 基于Pellicular分析的流动室内噪声实验与数值研究

IF 1 4区工程技术

International Journal of Acoustics and Vibration Pub Date : 2021-03-30 DOI: 10.20855/IJAV.2020.25.11677

Pan Zuofeng, Hou Hangsheng, Lu Wenbo, Jiang Changwei, Du Mintao, Y. Xiang, B. Changan

引用次数: 1

Obituary Notice: Professor David Newland 讣告：David Newland教授

IF 1 4区工程技术

International Journal of Acoustics and Vibration Pub Date : 2021-03-30 DOI: 10.20855/IJAV.2020.25.1O1

J. Talbot

引用次数: 0

Sound Transmission Prediction of Sandwich Plates With Honeycomb and Foam Cores and an Emphatic Discussion on Radiation Terms 蜂窝和泡沫夹层板的声传输预测及辐射项的重点讨论

IF 1 4区工程技术

International Journal of Acoustics and Vibration Pub Date : 2021-03-30 DOI: 10.20855/IJAV.2020.25.11735

T. Zhang, Ludi Kang, Xin Li, Hongbo Zhang, Bilong Liu

{"title":"Sound Transmission Prediction of Sandwich Plates With Honeycomb and Foam Cores and an Emphatic Discussion on Radiation Terms","authors":"T. Zhang, Ludi Kang, Xin Li, Hongbo Zhang, Bilong Liu","doi":"10.20855/IJAV.2020.25.11735","DOIUrl":"https://doi.org/10.20855/IJAV.2020.25.11735","url":null,"abstract":"When applying the modal summation method to the sound transmission loss (STL) prediction of various plates, the assumption of the blocked sound pressure, or alternatively speaking, ignoring sound radiation terms, has obvious simplicity and is sometimes used for the single-layered panels, rib-stiffened plates or heavily damped sandwich plates. For light-weighted sandwich plates with honeycomb and foam cores, however, this assumption is somewhat in doubt and worth examining. Based on sixth-order differential equations governing the flexural vibration of sandwich plates, the prediction formula of STL is derived by the modal summation approach. Theoretical predictions were validated by measurement data. Next, the theoretical formula of STL under the assumption of the blocked sound pressure was examined. The STL discrepancies of sandwich plates caused by sound radiation terms are illustrated. It was found that the STL discrepancies of sandwich plates were closely related to frequency, reached their peak value at the coincidence frequency region. The results indicate that the sound radiation terms, or the couplings between the radiated sound pressure and the plate response, should not be ignored for the prediction of STL for sandwich plates with honeycomb and foam cores.","PeriodicalId":49185,"journal":{"name":"International Journal of Acoustics and Vibration","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2021-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47604370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Numerical and Experimental Evaluation of Hydrodynamic Bearings Applied to a Jeffcott Test Bench 应用于Jeffcott试验台的流体动力轴承的数值和实验评估

IF 1 4区工程技术

International Journal of Acoustics and Vibration Pub Date : 2021-03-30 DOI: 10.20855/IJAV.2020.25.11732

E. C. Medeiros, A. Nabarrete, M. Cruchaga, W. R. P. Mendonça, M. H. Mathias

{"title":"Numerical and Experimental Evaluation of Hydrodynamic Bearings Applied to a Jeffcott Test Bench","authors":"E. C. Medeiros, A. Nabarrete, M. Cruchaga, W. R. P. Mendonça, M. H. Mathias","doi":"10.20855/IJAV.2020.25.11732","DOIUrl":"https://doi.org/10.20855/IJAV.2020.25.11732","url":null,"abstract":"Merging analytical and numerical models with experimental results improve the behaviour predictions of mechanical elements applied to rotor machinery, such as the bearings. This work aims to present the design of a hydrodynamic bearing prototype, a comparison and validation between the numerical and experimental results of critical speeds, and the differences of behaviour when the bush geometries and lubrication are changed. The bush geometries and the fluid film properties are analysed by measuring the dynamic behaviour of a rotor supported by these bearings. The experimental evaluation is based on measuring the Jeffcott test bench supported in a pair of bearings, showing the anisotropic behaviour caused by the stiffness difference in horizontal and vertical directions. It also presents an optimization of bushings for isotropic conditions when they were changed for different geometries (elliptical, offset halves) and different materials with boundary lubrication. This detailed study shows how the dynamic behaviour of rotating machinery can be predicted using numerical models and its validation by a test rig. Results also show how the vibration occurs if the bushes geometries are modified or its lubrication condition is changed.","PeriodicalId":49185,"journal":{"name":"International Journal of Acoustics and Vibration","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2021-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43129974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Railways: An Acoustical Point of View 铁路:声学的观点

IF 1 4区工程技术

International Journal of Acoustics and Vibration Pub Date : 2021-03-30 DOI: 10.20855/IJAV.2020.25.1E99

F. Denia

引用次数: 0

Optimization of Nonlinear Passive Suspension System to Minimize Road Damage for Heavy Goods Vehicle 重型货车道路损伤最小化的非线性被动悬架系统优化

IF 1 4区工程技术

International Journal of Acoustics and Vibration Pub Date : 2021-03-30 DOI: 10.20855/IJAV.2020.25.11724

Shailendra Kumar, A. Medhavi, Raghuvir Kumar

{"title":"Optimization of Nonlinear Passive Suspension System to Minimize Road Damage for Heavy Goods Vehicle","authors":"Shailendra Kumar, A. Medhavi, Raghuvir Kumar","doi":"10.20855/IJAV.2020.25.11724","DOIUrl":"https://doi.org/10.20855/IJAV.2020.25.11724","url":null,"abstract":"Major contributors to the road damage are Heavy Goods Vehicles (HGV), resulting in high maintenance costs of roads. This high cost makes it necessary to look into the issue seriously for minimizing the road damage. An Automobile Engineer can reduce road damage through the efficient design of a suspension system. The design involves satisfying the two conflicting criteria of riding comfort and vehicle handling with the restriction on the suspension travel. This paper involves designing an automobile suspension system, to improve the performance of the vehicle without a significant change in the cost of the suspension system and minimize road damage. To achieve the aforesaid objective, the use of a nonlinear passive suspension is suitable as compared to a linear passive suspension system. For the analysis, a HGV model of vehicle suspension has been considered. The suspension system considered for investigation comprises of a cubical nonlinear spring and a linear damper. Road damage has been represented by the fourth power of the tire dynamic load. A genetic algorithm has been used to optimize the half truck model to minimize road damage. The solution has been obtained using MATLAB and SIMULINK.","PeriodicalId":49185,"journal":{"name":"International Journal of Acoustics and Vibration","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2021-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49159808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Numerical Approach on Hybrid PID-AFC Controller using Different Intelligent Tuning Methods to Reduce the Vibration of the Suspended Handle 采用不同智能整定方法的PID-AFC混合控制器降低悬挂手柄振动的数值方法

IF 1 4区工程技术

International Journal of Acoustics and Vibration Pub Date : 2021-03-30 DOI: 10.20855/IJAV.2020.25.11713

M. Satar, Wong Jen Nyap, A. Mazlan

{"title":"Numerical Approach on Hybrid PID-AFC Controller using Different Intelligent Tuning Methods to Reduce the Vibration of the Suspended Handle","authors":"M. Satar, Wong Jen Nyap, A. Mazlan","doi":"10.20855/IJAV.2020.25.11713","DOIUrl":"https://doi.org/10.20855/IJAV.2020.25.11713","url":null,"abstract":"This paper focusses on the study of vibration attenuations for suspended handle models that are generated from power tools using an intelligent active force control (AFC) tuning strategy. Four types of control schemes are comparatively evaluated in suppressing the vibration of the handle, such as proportional-integral-derivative (PID), PID-AFC-crude approximation (AFCCA), PID-AFC-fuzzy logic (AFCFL) and PID-AFC-iterative learning method (AFCILM) control schemes. In all control schemes, the estimated counter force is generated from the actuating force and appropriate estimated mass M* that has been intelligently tuned to counter the system disturbances. The disturbances are modelled based on the power tools vibration (i.e., internal disturbance) and uncertainties during the operation (i.e., external disturbances). The study shows that the AFCCA scheme demonstrates the best performance when the M(CL) is tuned at 0.04 kg. For the AFCFL control scheme, the best response is obtained for the membership function of trapezoidal shape with M(FL) of 0.0403 kg, while for AFCILM control scheme, the best response is achieved when M(ILM) is tuned to 0.04 kg, with both parameters (A and B) set at 0.6. Overall, PID-AFCCA scheme shows the best performances for all of the case studies, followed by PID-AFCFL and PID-AFCILM. The findings of this study can benefit the power tool manufacturers and provide the basis of effectively intelligent controller design for the power tools application.","PeriodicalId":49185,"journal":{"name":"International Journal of Acoustics and Vibration","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2021-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48267696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1