The International Journal of Acoustics and Vibration最新文献

Multi-Objective Collaborative Optimization of Stiffness and Damping Performance of Acoustic Black Hole Plate 声学黑洞板刚度和阻尼性能的多目标协同优化

The International Journal of Acoustics and Vibration Pub Date : 2024-03-29 DOI: 10.20855/ijav.2024.29.12007

Jingjing Wang, Wei Huang, H. Ji, Jinhao Qiu

引用次数: 0

Assessing the Efficiency of the Air Isolation System Based on the Mathematical Models 根据数学模型评估空气隔离系统的效率

The International Journal of Acoustics and Vibration Pub Date : 2024-03-29 DOI: 10.20855/ijav.2024.29.12008

Zhihong Zhou, Huichuan Xu, Vanliem Nguyen, Lijing Pan, Binbin Wang

{"title":"Assessing the Efficiency of the Air Isolation System Based on the Mathematical Models","authors":"Zhihong Zhou, Huichuan Xu, Vanliem Nguyen, Lijing Pan, Binbin Wang","doi":"10.20855/ijav.2024.29.12008","DOIUrl":"https://doi.org/10.20855/ijav.2024.29.12008","url":null,"abstract":"Two calculation methods of the lumped parameter model (LPM) and mass flow ratio (MFR) used to establish dynamics models of air isolation system (AIS) in vehicles are widely applied. However, the efficiency and application range of the LPM and MFR for the AIS of the vehicles have not been explained in detail. To clarify this issue, the numerical simulation and experiment of the AIS performed under the harmonic excitation are given to evaluate the accuracy of the LPM and MFR. The two-axle automobiles and multi-axle heavy trucks equipped with the AIS are also simulated to evaluate the efficiency of the AIS with the LPM and MFR in improving ride comfort and road friendliness. The study shows that with the single model of the AIS, measured and simulated result in AIS's force response, force-deformation characteristic, and dynamics stiffness-frequency characteristic with LPM and MFR are similar. Therefore, both methods could be applied to establish the dynamic model of the AIS. However, by applying the AIS on the two-axle and multi-axle vehicles, the MFR improves road-friendliness and comfort in two-axle automobiles better than the LPM, conversely, the LPM improves road-friendliness and comfort in multi-axle trucks better than that the MFR. Therefore, to more accurately assess the isolation efficiency of the AIS in improving road-friendliness and comfort in vehicle, the MFR should be applied to the AIS using the pipe designed by the parallel pipes or long pipes of two-axle vehicles whereas the LPM should be applied to the AIS using the pipe designed by the complex pipes of multi-axle vehicles.","PeriodicalId":131358,"journal":{"name":"The International Journal of Acoustics and Vibration","volume":"50 14","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140367890","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

Study on Vibration Damping and Buffering Mechanism of Soles With Layered Gradient Lattice Structure 分层梯度晶格结构鞋底的振动阻尼和缓冲机制研究

The International Journal of Acoustics and Vibration Pub Date : 2024-03-29 DOI: 10.20855/ijav.2024.29.12004

Xiaoying Liu, Chengtao Ye, Chongning Wang, Jiandong Zhao, Xin Tong, Xianwei Huang

引用次数: 0

Analysis of Resonance Suppression Performance of a Time-Varying Isolation Platform 时变隔离平台的共振抑制性能分析

The International Journal of Acoustics and Vibration Pub Date : 2024-03-29 DOI: 10.20855/ijav.2024.29.11989

Jia-hui Wang, Jing Liu, Guang Pan

{"title":"Analysis of Resonance Suppression Performance of a Time-Varying Isolation Platform","authors":"Jia-hui Wang, Jing Liu, Guang Pan","doi":"10.20855/ijav.2024.29.11989","DOIUrl":"https://doi.org/10.20855/ijav.2024.29.11989","url":null,"abstract":"Expanding the low-frequency isolation range and suppressing the amplitude in the resonant region are important goals for vibration isolation in recent years. Various quasi-zero stiffness isolators and active isolators have emerged, achieving the expansion of the isolation range to low frequency. However, resonance suppression performance is limited by the damping structure and damping materials, making it difficult to achieve the ideal damping ratio. To simultaneously expand the low-frequency isolation range and suppress resonance, a time-varying isolation platform is proposed based on the resonant energy dispersion phenomenon of a time-varying structure. A finite element (FE) model of a fixed isolation platform is established to verify the low-frequency isolation range. One of the isolators slides along the flexible plate that changes the inherent characteristics of an isolation system which can suppress the formation of resonance. The effects of the time-varying path, damping and isolator stiffness on the amplitude in the resonant region are analyzed. The results demonstrate that the time-varying isolation platform not only has lower resonant frequency, but also can suppress the resonance peak to disperse the resonance energy in situations where system parameters are unidentified. The time-varying isolation platform provides a new approach for low frequency vibration isolation.","PeriodicalId":131358,"journal":{"name":"The International Journal of Acoustics and Vibration","volume":"89 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140366203","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

Philosophy in Acoustics 声学哲学

The International Journal of Acoustics and Vibration Pub Date : 2024-03-29 DOI: 10.20855/ijav.2024.29.1e111

Monika Gatt, Steffen Marburg

引用次数: 0

A New Conjugate Gradient Method for Impact Load Identification of Stochastic Composite Structures 用于随机复合材料结构冲击载荷识别的新共轭梯度法

The International Journal of Acoustics and Vibration Pub Date : 2024-03-29 DOI: 10.20855/ijav.2024.29.11998

Linjun Wang, Hongchun Wu, Youxiang Xie

引用次数: 0

Bolt Looseness Detection in Brake Disc of High-Speed Rail Using Wavelet Packet Decomposition and 1D Convolutional Neural Network 利用小波包分解和一维卷积神经网络检测高铁制动盘螺栓松动情况

The International Journal of Acoustics and Vibration Pub Date : 2024-03-29 DOI: 10.20855/ijav.2024.29.12014

Huifang Xiao, Zedong Li, Xuyang Guan, Zhaoxin Liu

{"title":"Bolt Looseness Detection in Brake Disc of High-Speed Rail Using Wavelet Packet Decomposition and 1D Convolutional Neural Network","authors":"Huifang Xiao, Zedong Li, Xuyang Guan, Zhaoxin Liu","doi":"10.20855/ijav.2024.29.12014","DOIUrl":"https://doi.org/10.20855/ijav.2024.29.12014","url":null,"abstract":"The effective and in-time detection of bolt looseness in the brake disc of high-speed rail is of great significance to ensure the safe operation of the train. The hammer tapping method is one of the most widely used methods for bolt looseness detection. Due to the complex structure of the brake disc, the vibration characteristics associated with bolt looseness are coupled with the transmission path from the head of the bolt through the brake disc to the sensors, which make it difficult to quantitively identify the bolt looseness. In this work, a method based on wavelet packet decomposition and a one-dimensional convolutional neural network (1D CNN) is proposed to quantitively detect the bolt looseness of brake disc. Firstly, the vibration signals collected from the two sensors mounted on the nut side are fused by autocorrelation summation to reduce the influence of transmission path. Secondly, the fused signal is decomposed to sub signals in low frequency and high frequency components by wavelet packet decomposition. The relative difference of wavelet packet energy among sub signals is extracted as the features to enhance the difference among different degrees of looseness. Finally, the 1D CNN model is established and trained by the features of energy relative difference to quantitively identify the bolt looseness. To validate the effectiveness of the proposed method, an experimental platform for bolt looseness detection in brake disc is constructed. Compared with the single-channel 1D CNN and fused signal-1D CNN models, the accuracy of the proposed method is approximately 97%, which confirms the superiority of the proposed method.","PeriodicalId":131358,"journal":{"name":"The International Journal of Acoustics and Vibration","volume":"54 19","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140367682","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

The Influence of General Music Education on the Perception of Soundscape 普通音乐教育对音景感知的影响

The International Journal of Acoustics and Vibration Pub Date : 2024-03-29 DOI: 10.20855/ijav.2024.29.12049

Baoqing Song, Hanchao Zhang, Junpeng Du, Na Na, Yukun Xu, Jian Kang

{"title":"The Influence of General Music Education on the Perception of Soundscape","authors":"Baoqing Song, Hanchao Zhang, Junpeng Du, Na Na, Yukun Xu, Jian Kang","doi":"10.20855/ijav.2024.29.12049","DOIUrl":"https://doi.org/10.20855/ijav.2024.29.12049","url":null,"abstract":"Music is closely related to soundscape. The present study employs methods and tools for assessing soundscape perception to compare the evaluation of soundscape perception between students who had not been taught general music courses (n=80, equal into N1, N2) with that of students who had been taught general music courses (n=40, MU) in four distinct audio-visual environments. According to the results of the questionnaire in four scenes and eight perceptual dimensions, there are significant differences between MU and N1 N2 (4-5 items), whereas there is only a slight difference between N1 and N2 (1 item). The difference in soundscape perception is reflected in those students who had been taught general music courses having a higher evaluation of the diversity of soundscape elements (as eventful), and different emotional judgments of the sound environment (as calm). These differences are visualized using the soundscape analysis tool, Soundscapy. Overall, the findings suggest that taking a general music course promotes richer sound perceptions and clearer affective associations with sound and that these enhancements could be presented using the soundscape perception measurement method. The findings also presented could inform the effectiveness of teaching in a general music course.","PeriodicalId":131358,"journal":{"name":"The International Journal of Acoustics and Vibration","volume":"57 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140368069","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 Response of an Overhead Crane with Anti-Swing Controller in Driving Force and Energy Consumption 带防摆动控制器的桥式起重机在驱动力和能耗方面的动态响应

The International Journal of Acoustics and Vibration Pub Date : 2024-03-29 DOI: 10.20855/ijav.2024.29.11960

Ruiqi Gao, Houhua Gong, Xinyu Du, Qingzhe Meng, Rong Wang, Mingxiao Dong

引用次数: 0

Nonlinear Acoustic Behavior Prediction and Analysis of Straight Through Perforated Tube Silencer With Flow 带流直通穿孔管消声器的非线性声学特性预测与分析

The International Journal of Acoustics and Vibration Pub Date : 2024-03-29 DOI: 10.20855/ijav.2024.29.12018

Kangjian Han, Zhenlin Ji

{"title":"Nonlinear Acoustic Behavior Prediction and Analysis of Straight Through Perforated Tube Silencer With Flow","authors":"Kangjian Han, Zhenlin Ji","doi":"10.20855/ijav.2024.29.12018","DOIUrl":"https://doi.org/10.20855/ijav.2024.29.12018","url":null,"abstract":"Straight through perforated tube silencers are widely used in intake and exhaust noise control, and their acoustic behaviors are influenced by the gas flow and high amplitude sound remarkably. To investigate the acoustic attenuation performance of straight through perforated tube silencers in the presence of flow and high amplitude sound, an approach based on the three-dimensional (3D) time-domain computational fluid dynamics (CFD) simulation is employed and validated by comparing predictions and measurements. Transmission loss of the straight through perforated tube silencer under pure tone and multi-tone sound excitations is predicted. Results show that, under the pure tone sound excitations, the acoustic attenuations are affected remarkably by the high amplitude sound, and the nonlinear effects turn to weaken as flow velocity increases. With the sound pressure level (SPL) decreasing along the axis of the silencer, the acoustic nonlinearity in the orifice weakens gradually. The shedding vortices are restricted to the region near perforations because of the transport of flow. When the multi-tone sound excitation is enforced on the inlet, transmission loss of the silencer is different from the pure tone excitation at the same SPL of every compositional frequency.","PeriodicalId":131358,"journal":{"name":"The International Journal of Acoustics and Vibration","volume":"21 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140368189","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