The International Journal of Acoustics and Vibration最新文献_第7页

Design and Characterization of a Test Bench For Interior Noise Investigations 室内噪声检测试验台的设计与特性研究

The International Journal of Acoustics and Vibration Pub Date : 2022-09-30 DOI: 10.20855/ijav.2022.27.31866

Ling Liu, F. Ripamonti, R. Corradi, Zhushi Rao

{"title":"Design and Characterization of a Test Bench For Interior Noise Investigations","authors":"Ling Liu, F. Ripamonti, R. Corradi, Zhushi Rao","doi":"10.20855/ijav.2022.27.31866","DOIUrl":"https://doi.org/10.20855/ijav.2022.27.31866","url":null,"abstract":"The increasing demand for acoustic comfort in vehicles has popularized the vibroacoustic analysis using computer-aided engineering (CAE) tools and boosted the development of various noise control measures. Concerning the often-unknown reliability of a CAE tool and the high cost of testing control strategies in a real vehicle, this paper proposes a test bench called Noise-Box, for benchmarking the CAE tools and testing new control measures. The test bench is designed towards a simple plate-cavity system that is easy to model and analyze, so that any vibroacoustic test performed on it can be accurately reproduced by numerical models. Specifically, it is a concrete box with six rigid walls and an opening that can be covered by flexible or soundproofing panels. The complete design is elaborated, including the cavity's shape and dimensions, the panel's installation and the device's overall configuration. Moreover, the acoustic field provided by the test bench is characterized for the typical features that will guide the device's future applications, covering modal property, reverberation time (or sound absorption) and field diffuseness. This work could be informative and instructive not only for the presentation of the novel test bench but also for the utilized methodologies in its design and characterization.","PeriodicalId":131358,"journal":{"name":"The International Journal of Acoustics and Vibration","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127274798","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 Reliable Control and Design Optimization UnderNon-Probabilistic Uncertainties 非概率不确定性下的振动可靠控制与设计优化

The International Journal of Acoustics and Vibration Pub Date : 2022-09-30 DOI: 10.20855/ijav.2022.27.3e105

Lei Wang

引用次数: 0

A Design Method for Vibration and Acoustic Reduction of the Power System in an Underwater Automobile Glider 水下汽车滑翔机动力系统的减振降噪设计方法

The International Journal of Acoustics and Vibration Pub Date : 2022-09-30 DOI: 10.20855/ijav.2022.27.31865

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

{"title":"A Design Method for Vibration and Acoustic Reduction of the Power System in an Underwater Automobile Glider","authors":"Yujun Liu, Jing Liu, Guang-xu Pan, Liming Guo, Qiaogao Huang","doi":"10.20855/ijav.2022.27.31865","DOIUrl":"https://doi.org/10.20855/ijav.2022.27.31865","url":null,"abstract":"Underwater automobile gliders (AUGs) are new underwater vehicles, that should have lightweight structures with low vibration and acoustic characteristics due to their working conditions. This paper proposes a design method for vibration and acoustic reduction of the power system in an AUG by using the stand-off layer perforated viscoelastic material (SOL-PVEM) damping treatment with lightweight characteristics. The finite element method is used to calculate the vibration characteristics and modal loss factors of the plates with different SOL-PVEM damping treatments. The influence of the perforation of the damping layer on the modal loss factor is investigated. Then, the structure and acoustic coupling of finite element models of the power system with the SOL-VEM and SOL-PVEM damping treatments are established. The vibration acceleration, sound power, and sound pressure directivity of the power system of the AUG coated with the two proposed damping treatments are analyzed respectively. The results show that the vibration and acoustic responses of the power system can be effectively reduced by using the proposed lightweight SOL-PVEM damping treatment.","PeriodicalId":131358,"journal":{"name":"The International Journal of Acoustics and Vibration","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128099070","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

Environmental Noise Harvester Using a Helmholtz Resonator and Piezoelectric Transducer 使用亥姆霍兹谐振腔和压电换能器的环境噪声收集器

The International Journal of Acoustics and Vibration Pub Date : 2022-09-30 DOI: 10.20855/ijav.2022.27.31889

Daniel Aguilar-Torres, O. Jiménez-Ramírez, Onesimo Flores-Acoltzi, Juan Á Jiménez-García, Guillermo Luque-Zuñiga, R. Vázquez-Medina

{"title":"Environmental Noise Harvester Using a Helmholtz Resonator and Piezoelectric Transducer","authors":"Daniel Aguilar-Torres, O. Jiménez-Ramírez, Onesimo Flores-Acoltzi, Juan Á Jiménez-García, Guillermo Luque-Zuñiga, R. Vázquez-Medina","doi":"10.20855/ijav.2022.27.31889","DOIUrl":"https://doi.org/10.20855/ijav.2022.27.31889","url":null,"abstract":"This work represents a guideline for designing, analyzing, and implementing a compact, low-cost, lightweight, and portable system that harvests energy from environmental noise at different locations. Considering that the proposed energy harvesting system (EHS) is based on a piezoelectric transducer (PZT) embedded in a Helmholtz resonator (HR), we first characterize the noise at four different locations selecting the most suitable ones for energy harvesting. Then, we electrically analyze and describe the PZT determining its resonance frequency. Subsequently, by using this frequency, we perform the sizing of the HR. Thus, we analyze the behavior of the implemented EHS under controlled and actual conditions. In controlled conditions, we determine the gain of the implemented EHS using a pure sinusoidal signal at 500 Hz and a pink noise signal. In actual conditions, we measured its gain considering two different locations. We observed that under controlled conditions, the implemented EHS achieved a gain between 168.3% and 200.3%, and under actual conditions, its gain was 159.5% in the traffic zone and 597.7% in the music zone. In addition, for the HR modeling and design, we show that its theoretical gain corresponds to its simulation gain but differs from its experimental gain due to the used material and manufacturing. Finally, we show that the implemented EHS performs similarly or better than other more sophisticated systems or systems with more piezoelectric elements.","PeriodicalId":131358,"journal":{"name":"The International Journal of Acoustics and Vibration","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115389478","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

Design of Multi-Mode Low-Frequency Vibration Suppressor Based on Dynamic Vibration Absorption Principle 基于动态吸振原理的多模低频减振器设计

The International Journal of Acoustics and Vibration Pub Date : 2022-09-30 DOI: 10.20855/ijav.2022.27.31870

Yipeng Cheng, Zilong Peng, Huabing Wen, Hao Song, Zixian Cui

{"title":"Design of Multi-Mode Low-Frequency Vibration Suppressor Based on Dynamic Vibration Absorption Principle","authors":"Yipeng Cheng, Zilong Peng, Huabing Wen, Hao Song, Zixian Cui","doi":"10.20855/ijav.2022.27.31870","DOIUrl":"https://doi.org/10.20855/ijav.2022.27.31870","url":null,"abstract":"Dynamic vibration absorbers (DVA) are commonly studied for their advantage in controlling the low-frequency resonance peaks, but most relevant studies are still at the stage of theoretical innovation such as nonlinearity parameters and active control. Nevertheless, there are few kinds of vibration suppression structures based on dynamic vibration absorption principle. In this paper, therefore, we proposed a novel vibration suppressor inspired by the DVA theory. The vibration of a four-sided simply-supported thin plate attached with the DVAs array was studied by applying the modal superposition method. A preliminary suppressor model was proposed with rubber and steel as its main material, and whose modal frequency is calculated theoretically. Geometric and material parameters of each component were adjusted based on the DVA parameters. The vibration control effect of the suppressors array was verified through simulation and by experiment. Results showed that three resonance peaks were suppressed, and it was obvious after the attachment to the DVAs array or suppressors array. The contact form between the suppressors array and the plate is surface contact, which is different from the point contact between the DVAs array and the plate, therefore the vibration control effect of vibration suppressors array is more obvious.","PeriodicalId":131358,"journal":{"name":"The International Journal of Acoustics and Vibration","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126412591","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

Modeling and Dynamics Analysis on Pseudo-Rigid-Body for the Swing Vibrator of the Caudal-Fin-Like Valve-Less Pump 尾鳍式无阀泵摆振器伪刚体建模与动力学分析

The International Journal of Acoustics and Vibration Pub Date : 2022-09-30 DOI: 10.20855/ijav.2022.27.31764

Xiaoqi Hu, Caiqi Hu, Hui Du, Jude Liu

{"title":"Modeling and Dynamics Analysis on Pseudo-Rigid-Body for the Swing Vibrator of the Caudal-Fin-Like Valve-Less Pump","authors":"Xiaoqi Hu, Caiqi Hu, Hui Du, Jude Liu","doi":"10.20855/ijav.2022.27.31764","DOIUrl":"https://doi.org/10.20855/ijav.2022.27.31764","url":null,"abstract":"A bio-inspired swing vibrator applied in fluid driving has the characteristics of a large deformation and rigid-lexible structure. Currently, there is a shortage of influential theories and methods to analyze its vibration. This research established a dynamic model for studying the bionic rigid-flexible swing vibrator based on pseudo-rigid-body theory. The weak coupling relationship between vibration arm DOF and flexible caudal-fin DOF was proposed by comparing the diagonal elements with the characteristic matrix's anti-diagonal elements. Analysis results showed that the presence of a flexible caudal-fin had minimal impact on the vibration modes of the vibration arm. The flexible caudal-fin vibration could be treated as a dynamic response that uses the vibration arm's end as a foundation. Experimental studies were conducted, and a laser Doppler vibrometer was used to measure the vibrator's vibration modes. The experimental results indicated that whether the vibrator works in water or in air, the presence of a flexible caudal-fin had little impact on the resonance frequency of the vibration arm. Finally, experimental results were discussed based on theoretical analysis and conclusions. This paper provides an academic tool for modeling, optimization, and a working mechanism analysis on the rigid-flexible swing vibrator.","PeriodicalId":131358,"journal":{"name":"The International Journal of Acoustics and Vibration","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126911364","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

Acoustic Needs of Older People in the Outdoor Environment of Residential Communities: A Case Study in China 老年人在居住社区户外环境中的声学需求:以中国为例

The International Journal of Acoustics and Vibration Pub Date : 2022-06-30 DOI: 10.20855/ijav.2022.27.21838

Huayue Zhang, Jian Kang

{"title":"Acoustic Needs of Older People in the Outdoor Environment of Residential Communities: A Case Study in China","authors":"Huayue Zhang, Jian Kang","doi":"10.20855/ijav.2022.27.21838","DOIUrl":"https://doi.org/10.20855/ijav.2022.27.21838","url":null,"abstract":"This study examines the acoustic needs of older people in an outdoor environment to design outdoor spaces according to their needs. Using the grounded theory approach, we selected and interviewed 16 older people from four residential communities in China. The acoustic needs of older people in an outdoor environment are established in terms of sound preference, quietness, acoustic variability, acoustic comfort, subjective loudness, sound rhythm, sound clarity, and sound sensitivity. The findings show that older people (a) attach importance to quietness when considering sound preference, (b) prefer taking a walk in an overall quiet environment, although sometimes a lively environment, (c) chose to conduct their activities in an environment with low variation in sound, (d) rate the comfort of their overall acoustic environment highly, (e) show little need for subjective loudness as long as the sounds are not ones they dislike, (f) generally prefer relatively rhythmic sound sources, (g) did not have a significant need for sound clarity, and (h) are tolerant of outdoor acoustic environments and did not pay too much attention to certain sounds. These findings can provide direction for better outdoor space designs in communities, to suit older people, and to create age-friendly cities.","PeriodicalId":131358,"journal":{"name":"The International Journal of Acoustics and Vibration","volume":"3 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":"125942449","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

Fault Classification of Rolling Element Bearing in Machine Learning Domain 基于机器学习的滚动轴承故障分类

The International Journal of Acoustics and Vibration Pub Date : 2022-06-30 DOI: 10.20855/ijav.2022.27.21829

M. Jamil, Sidra Khanam

{"title":"Fault Classification of Rolling Element Bearing in Machine Learning Domain","authors":"M. Jamil, Sidra Khanam","doi":"10.20855/ijav.2022.27.21829","DOIUrl":"https://doi.org/10.20855/ijav.2022.27.21829","url":null,"abstract":"Rolling element bearings are crucial components of rotating machinery used in various industries, including aerospace, navigation, machine tools, etc. Therefore, it is essential to establish suitable techniques for condition monitoring and fault diagnosis of bearings to avoid breakdowns and damages during operation for overall industrial sustainability. Vibration-based condition monitoring has been the most employed technique in this perspective. Many researchers have investigated the vibration response of rolling element bearings having inner race defects, outer race defects, or rolling element defects using conventional techniques in past decades. However, Machine Learning (ML) has emerged as another way of bearing fault diagnosis. In this work, fault signatures of ball bearings are classified using a total of 6 (with 24 subcategories) ML models, and a comparative performance of these models is presented. The ML classifiers are trained with extracted time-domain and frequency-domain features using open-source Case Western Reserve University (CWRU) bearing data. Two datasets of different sample size and number of samples of vibration data corresponding to a healthy ball bearing, a defective bearing with inner race defect, a ball defect, and an outer race defect, running at a particular set of working conditions, are considered. The accuracy of ML models is compared to identify the best model for classifying the faults under consideration.","PeriodicalId":131358,"journal":{"name":"The International Journal of Acoustics and Vibration","volume":"1 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":"129965493","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

A Decoupling Algorithm Based on PID Neural Network for Multi-Channel Active Noise Control of Nonstationary Noise 基于PID神经网络的多通道有源噪声解耦控制

The International Journal of Acoustics and Vibration Pub Date : 2022-06-30 DOI: 10.20855/ijav.2022.27.21835

Xue-cong Wu, Yansong Wang, Hui Guo, T. Yuan, Pei Sun, Lihui Zheng

{"title":"A Decoupling Algorithm Based on PID Neural Network for Multi-Channel Active Noise Control of Nonstationary Noise","authors":"Xue-cong Wu, Yansong Wang, Hui Guo, T. Yuan, Pei Sun, Lihui Zheng","doi":"10.20855/ijav.2022.27.21835","DOIUrl":"https://doi.org/10.20855/ijav.2022.27.21835","url":null,"abstract":"It is critical to study multi-channel active noise control (ANC) systems to satisfy the requirements of noise reduction in multi-target positions. However, the complexity of the system may increase as the result of an increased number of sound channels. In addition, multi-channel coupling affects the stability of a system. In this paper, a decoupling algorithm based on the Proportion Integration Differentiation (PID) neural network and the filtered-x least-mean-square (FxLMS) for the multi-channel ANC of nonstationary noise is proposed. Due to the nonlinear characteristics of the PID neural network, the coupling problem can be solved through the algorithm. The performance of the novel proposed algorithm is verified by comparing the simulation results with the results from the traditional FxLMS algorithm and the FxLMS algorithm with matrix decoupling. The results illustrate that the convergence speed of the traditional FxLMS algorithm is similar to that of the FxLMS algorithm with matrix decoupling, while the proposed algorithm converges significantly faster than the other two algorithms. In terms of control performance, the proposed algorithm executes the best and the residual error signal has the minimum amplitude, followed by the FxLMS algorithm with matrix decoupling and the traditional FxLMS algorithm. With the advantages in convergence speed and control performance, the proposed decoupling algorithm could be suitable for multi-channel nonstationary ANC.","PeriodicalId":131358,"journal":{"name":"The International Journal of Acoustics and Vibration","volume":"9 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":"131307288","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 the LQR Control of High-speed Elevator Car Horizontal Vibration Based on the Jumping Inertia Weight Particle Swarm Optimization 基于跳跃惯性权值粒子群优化的高速电梯轿厢水平振动LQR控制研究

The International Journal of Acoustics and Vibration Pub Date : 2022-06-30 DOI: 10.20855/ijav.2022.27.21845

Qin He, Hua Li, Ruijun Zhang, Tichang Jia

{"title":"Study on the LQR Control of High-speed Elevator Car Horizontal Vibration Based on the Jumping Inertia Weight Particle Swarm Optimization","authors":"Qin He, Hua Li, Ruijun Zhang, Tichang Jia","doi":"10.20855/ijav.2022.27.21845","DOIUrl":"https://doi.org/10.20855/ijav.2022.27.21845","url":null,"abstract":"To reduce the horizontal vibration of a high-speed elevator car caused by the excitation of a guide rail more effectively, a differential magnetic suspension active guide shoe based on the principle of the differential magnetic suspension actuator is designed. Then the dynamic model of the active vibration damping system of the elevator car is established and an LQR controller is designed to reduce the horizontal vibration of the car. To search the weighting coefficient matrix of the LQR controller more efficiently, an algorithm named Jumping inertia Weight Particle Swarm Optimization (JWPSO) algorithm is proposed, and the frequently used fitness function verifies the optimization effect of the JWPSO algorithm. The weighting coefficient matrix of the LQR controller is optimized using the JWPSO algorithm. Finally, the impact of the JWPSO algorithm-optimized LQR controller is verified by MATLAB. The simulation result shows that the designed active vibration controller can effectively attenuate the horizontal vibration of the elevator car, and the control effect is significantly better than the LQR controller optimized by the GA algorithm and the H-inf controller optimized by LMI. This paper provided a new method for horizontal vibration reduction of the high-speed elevator car.","PeriodicalId":131358,"journal":{"name":"The International Journal of Acoustics and Vibration","volume":"46 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":"123236096","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