The International Journal of Acoustics and Vibration最新文献_第8页

Vibration Analysis for Fault Detection of Wind Turbine: New Methodology of Supervised Machine Learning Techniques 风力发电机故障检测的振动分析:监督机器学习技术的新方法

The International Journal of Acoustics and Vibration Pub Date : 2022-06-30 DOI: 10.20855/ijav.2022.27.21836

Javier Vives

引用次数: 0

Optimization Design of Vibration Reduction Structure of Driving Sprocket Based on Niche Adaptive Genetic Algorithm 基于小生境自适应遗传算法的驱动链轮减振结构优化设计

The International Journal of Acoustics and Vibration Pub Date : 2022-06-30 DOI: 10.20855/ijav.2022.27.21851

Zhan Zhao, W. Meng, B. Yan, Tao Yang, Hong-wei Ren, Yuan Yuan

{"title":"Optimization Design of Vibration Reduction Structure of Driving Sprocket Based on Niche Adaptive Genetic Algorithm","authors":"Zhan Zhao, W. Meng, B. Yan, Tao Yang, Hong-wei Ren, Yuan Yuan","doi":"10.20855/ijav.2022.27.21851","DOIUrl":"https://doi.org/10.20855/ijav.2022.27.21851","url":null,"abstract":"To improve the damping performance of driving sprocket of crawler construction vehicle, this paper replaces the tubular constraint ``double damping layer'' structure (TCDDS) with a ``damping layer + stand-off-layer'' structure, and the dynamics analysis of the structure is carried out under multiple working conditions. By analyzing the dynamic performance of the vibration damping structure under different working conditions, the optimal laying position of the damping layer and the stand-off-layer is discussed. Furthermore, under the condition that the total thickness of the tubular stand-off-layer sandwiched structure(TSSS) remains constant and both the stand-off- layer and damping layer do not exceed the allowable stress and strain, the energy loss ratio per unit period is taken as the optimization goal, and based on niche-adaptive genetic algorithm, the design variables(thickness of base layer, constraint layer, stand-off-layer and damping layer, material elastic modulus and loss factor of stand-off-layer and damping layer) are optimized by ANSYS and MATLAB. The optimization results show that the maximum displacement and stress of the damping layer and stand-off-layer of the structure after optimization are greatly reduced compared with those before optimization, the maximum strain increases from 15.35% to 22.55%, and the energy loss ratio increases from 0.2914 to 0.5418, which improves the vibration reduction effect of the structure. The theories and methods of this paper can provide a certain reference for the vibration damping design of heavy-duty crawler vehicles, and have a certain reference value for the application of genetic algorithm optimization in the structural design of construction vehicles.","PeriodicalId":131358,"journal":{"name":"The International Journal of Acoustics and Vibration","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128134838","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

Vibration Analysis and Isolator Component Design of the Power System in an Autonomous Underwater Glider 自主水下滑翔机动力系统振动分析及隔振元件设计

The International Journal of Acoustics and Vibration Pub Date : 2022-06-30 DOI: 10.20855/ijav.2022.27.21841

Yujun Liu, Jing Liu, Guang-xu Pan, Qiaogao Huang, Liming Guo

{"title":"Vibration Analysis and Isolator Component Design of the Power System in an Autonomous Underwater Glider","authors":"Yujun Liu, Jing Liu, Guang-xu Pan, Qiaogao Huang, Liming Guo","doi":"10.20855/ijav.2022.27.21841","DOIUrl":"https://doi.org/10.20855/ijav.2022.27.21841","url":null,"abstract":"Vibration isolation technology is one of the main methods for controlling the vibration and noise of underwater vehicles. This paper presents a vibration analysis and vibration isolator component design method of the power system in autonomous underwater gliders (AUGs). The dynamic models of the single-layer and double-layers vibration isolation systems of the power system of the AUG are established to analyze the force transfer rate in the system. A reasonable stiffness range of the vibration isolation system is obtained according to the results of the dynamic model. To validate the vibration isolation performances of the presented vibration isolation systems, the finite element (FE) models of single-layer and double-layers vibration isolation systems are established. The vibration responses and vibration isolation performances of the system with and without the rubber isolation systems are compared. Moreover, the effect of stiffness on the vibration isolation performances of the system is discussed. The presented results can provide some guidance for the design method of the vibration isolation system in the power system of AUGs.","PeriodicalId":131358,"journal":{"name":"The International Journal of Acoustics and Vibration","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117186195","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

Dynamic Analysis of Outer and Inner Race Defects on Thermoplastic Rolling Bearing System Using Implicit Finite Element Method 热塑性滚动轴承系统内外圈缺陷的隐式有限元动力学分析

The International Journal of Acoustics and Vibration Pub Date : 2022-06-30 DOI: 10.20855/ijav.2022.27.21853

Nesrine Gaaliche, S. Chithambaram, R. Fathallah

{"title":"Dynamic Analysis of Outer and Inner Race Defects on Thermoplastic Rolling Bearing System Using Implicit Finite Element Method","authors":"Nesrine Gaaliche, S. Chithambaram, R. Fathallah","doi":"10.20855/ijav.2022.27.21853","DOIUrl":"https://doi.org/10.20855/ijav.2022.27.21853","url":null,"abstract":"This paper proposes an improved finite element dynamic model to analyze the vibration response of a rolling bearing system. The vibration responses of defect free and defective polypropylene (PP) bearings are analyzed using the finite element analysis and compared with the experimental results using the in house developed bearing fatigue test rig. The boundary conditions of this model are imposed to ensure an adequate homogeneity with the experimental apparatus. This study considers the viscoelastic property of thermoplastic to investigate the effect of the flexibility and damping viscosity of material. The three-dimensional dynamic analysis detects the vibrations produced in a rolling bearing system. Modal frequencies and the vibration modes shapes which must be avoided had been determined. Monitoring the evolution of vibration signatures as a function of defect location is also carried out using Finite Element Analysis (FEM). Test results reveal that peak vibration amplitudes are more pronounced in an inner ring defect than in an outer ring defect. Vibration signals of stainless-steel bearings are investigated to compare the performance of the thermoplastic bearings with its metallic counterparts. Both test and simulation results reveal that a lower level of vibration is observed with PP bearings compared to that of metal. The PP bearings not only dampen vibrations, but also accommodate shaft misalignments unlike their steel counterparts. Once overall vibration spectrums results are validated, Von Mises stresses within the rings are evaluated under excessive loading conditions. The simulation results show that stress is high in raceways where the balls are compressed between the raceways. Computational results agree well with the experimental tests for the test scenarios.","PeriodicalId":131358,"journal":{"name":"The International Journal of Acoustics and Vibration","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116512737","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

Dynamic Responses of Liquid Storage Tank Under Near Fault Pulse-Like Earthquakes With Different Focal Mechanisms 不同震源机制近断层脉状地震下储液罐的动力响应

The International Journal of Acoustics and Vibration Pub Date : 2022-06-30 DOI: 10.20855/ijav.2022.27.21848

W. Jing, Jianxun Shen, Xuansheng Cheng

{"title":"Dynamic Responses of Liquid Storage Tank Under Near Fault Pulse-Like Earthquakes With Different Focal Mechanisms","authors":"W. Jing, Jianxun Shen, Xuansheng Cheng","doi":"10.20855/ijav.2022.27.21848","DOIUrl":"https://doi.org/10.20855/ijav.2022.27.21848","url":null,"abstract":"A liquid storage tank has a very extensive role in the petrochemical industry, and earthquake damage will cause very serious consequences. Considering the fluid-solid coupling, material nonlinearity and liquid level shaking dynamic behavior, three-dimensional calculation models of non-isolated and isolated liquid storage tanks are established, respectively. 12 earthquake waves are selected from Pacific Earthquake Engineering Research Center (PEER), and there are three earthquake waves of reverse (R), strike slip (SS), reverse oblique (RO) and normal (N) focal mechanisms, respectively. The influence of the focal mechanism on the dynamic responses of the liquid storage tank is investigated. The effectiveness control of sliding isolation on a near fault earthquake is discussed. The influence of the diameter of the limiting device on the shock absorption effect is analyzed. The results show that the order of influence of four types of focal mechanisms on liquid sloshing wave height is as follows: RO$mathrm{>$R$mathrm{>$SS$mathrm{>$N. For the wall displacement, liquid pressure and effective stress of the tank wall, the response under N-type focal mechanism earthquake is generally larger than that of the other three types, and the difference of wall displacement, liquid pressure and wall effective stress under RO, R and SS focal mechanism earthquakes is small. The results show that the dynamic responses of the liquid storage tank under different focal mechanism earthquakes is quite different. Sliding isolation can significantly reduce the dynamic responses of the liquid storage tank under strong near-fault earthquakes, and the diameter of the limiting device will affect the shock absorption effect of sliding isolation.","PeriodicalId":131358,"journal":{"name":"The International Journal of Acoustics and Vibration","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129018268","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

Editor's space: ICSV28: Vibrant and Inspiring Singapore Awaits You 编辑空间:ICSV28:充满活力和灵感的新加坡等待你

The International Journal of Acoustics and Vibration Pub Date : 2022-06-30 DOI: 10.20855/ijav.2022.27.2e104

V. Pallayil, Lim Kian Meng

引用次数: 0

Enhancing the Classification Performance of Machine Learning Techniques by Using Hjorth's and Other Statistical Parameters for Precise Tracking of Naturally Evolving Faults in Ball Bearings 利用Hjorth和其他统计参数提高机器学习技术的分类性能，以精确跟踪滚珠轴承自然演化故障

The International Journal of Acoustics and Vibration Pub Date : 2022-06-30 DOI: 10.20855/ijav.2022.27.21847

Sameera Mufazzal, S. Muzakkir, Sidra Khanam

{"title":"Enhancing the Classification Performance of Machine Learning Techniques by Using Hjorth's and Other Statistical Parameters for Precise Tracking of Naturally Evolving Faults in Ball Bearings","authors":"Sameera Mufazzal, S. Muzakkir, Sidra Khanam","doi":"10.20855/ijav.2022.27.21847","DOIUrl":"https://doi.org/10.20855/ijav.2022.27.21847","url":null,"abstract":"The research on identification of artificially induced faults in bearing is available in abundance in the past literature, however, the diagnosis becomes more challenging when the fault evolves naturally inside the bearing, and especially when its stages need to be precisely tracked. The conventional statistical features used commonly in the past literature do not uniquely characterize the fault status, and yield satisfactory results only in limited cases, like those for artificial faults. In this work, a new combination of fault descriptors, including three Hjorth's parameters, three statistical features and an entropy measure, is proposed and its effectiveness has been analyzed on classification performances of k-Nearest Neighbor (k-NN) and Support Vector Machine (SVM). Two datasets comprising the signals of run-to-failure tests were taken from Intelligent Maintenance Systems (IMS) and the Paderborn university repository. The data were categorized into large number of classes to closely indicate the actual fault type and size. Compared to conventional statistical features, the new combination was able to enhance the classification accuracy of k-NN and SVM, respectively, from 91.3% to 99.9%, and from 94.8% to 99.7% in the case of IMS dataset, and from 94.1% to 98.5%, and from 94.7% to 98.4% in the case of Paderborn dataset. In addition to accuracy, the performance metrics, including precision, recall, and F1-score were also improved using the proposed combinatory features.","PeriodicalId":131358,"journal":{"name":"The International Journal of Acoustics and Vibration","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125591986","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

Numerical and Experimental Modal Analyses of Inclined Supported Bridge Wing Structures 斜支桥翼结构模态数值与实验分析

The International Journal of Acoustics and Vibration Pub Date : 2022-03-29 DOI: 10.20855/ijav.2022.27.11863

A. Yucel

引用次数: 1

Rolling Bearing Fault Feature Extraction Using Local Maximum Synchrosqueezing Transform and Global Fuzzy Entropy 基于局部最大同步压缩变换和全局模糊熵的滚动轴承故障特征提取

The International Journal of Acoustics and Vibration Pub Date : 2022-03-29 DOI: 10.20855/ijav.2022.27.11827

Keheng Zhu, Xiucheng Yue, Dejian Sun, Shichang Xiao, Xiong Hu

{"title":"Rolling Bearing Fault Feature Extraction Using Local Maximum Synchrosqueezing Transform and Global Fuzzy Entropy","authors":"Keheng Zhu, Xiucheng Yue, Dejian Sun, Shichang Xiao, Xiong Hu","doi":"10.20855/ijav.2022.27.11827","DOIUrl":"https://doi.org/10.20855/ijav.2022.27.11827","url":null,"abstract":"To achieve good performance of fault feature extraction for a rolling bearing, a new feature extraction method is presented in this paper based on local maximum synchrosqueezing transform (LMSST) and global fuzzy entropy (GFuzzyEn). First, targeting the time-varying features of the vibration signals of the rolling bearing, the LMSST algorithm, which is a newly developed time-frequency method and allows for adaptive mode decomposition, is used to preprocess the vibration signals into a number of mode components. Then, as a modification of FuzzyEn, GFuzzyEn is adopted to evaluate the complexity of these mode components. Compared to FuzzyEn, which focuses mainly on the local characteristics of the short-term physiological time series, the GFuzzyEn emphasizes the global characteristics of the signal considering that the bearing vibration signals' global fluctuation may change as the bearing works under various conditions. Finally, the fault features of the bearing vibration signals are extracted by combining the LMSST and the GFuzzyEn. The experimental analysis shows that the proposed LMSST-GFuzzyEn method can extract rich fault-related information from the bearing vibration data and can achieve good classification performance for rolling bearing fault diagnosis.","PeriodicalId":131358,"journal":{"name":"The International Journal of Acoustics and Vibration","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125662536","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: 4

Obituary Notice of Marc Asselineau (1958 - 2021) 马克·阿塞利诺讣告(1958 - 2021)

The International Journal of Acoustics and Vibration Pub Date : 2022-03-29 DOI: 10.20855/ijav.2022.27.1o2

Jack. Evans

引用次数: 0