International Journal of Acoustics and Vibration最新文献_第4页

Research of Contact Response of an Elastic Sphere Impacting a Rigid Plate Based on the Mass-Spring-Damped Oscillator Model and Dimensionless Parameter omega_Omega 基于质量弹簧阻尼振子模型和无量纲参数ω的弹性球与刚性板的接触响应研究

IF 1 4区工程技术

International Journal of Acoustics and Vibration Pub Date : 2020-06-30 DOI: 10.20855/ijav.2020.25.21523

Yang Yang, Q. Zeng, L. Wan, Wang Liang, Guangjun Yin

{"title":"Research of Contact Response of an Elastic Sphere Impacting a Rigid Plate Based on the Mass-Spring-Damped Oscillator Model and Dimensionless Parameter omega_Omega","authors":"Yang Yang, Q. Zeng, L. Wan, Wang Liang, Guangjun Yin","doi":"10.20855/ijav.2020.25.21523","DOIUrl":"https://doi.org/10.20855/ijav.2020.25.21523","url":null,"abstract":"The contact theory, such as the Hertz theory and Hunt-Crossley model can just solve the contact response when the sphere goes to the maximum compression but can’t solve the contact process. In traditional research the impact process is considered as a single degree of freedom dynamical spring-damping system, however, the calculated contact force is much greater than the actual one. Based on the shortage of the conducted studies, a new dimensionless parameter ωΩ is proposed in this paper, the mass-spring-damped oscillator model (MSDOM) and the new contact theory with the consideration of the sphere mass and ωΩ are established. The correctness of the theoretical model is verified by 3D simulation, and the optimal contact force model is obtained. Furthermore, influence rules of material properties and contact parameters on contact response were studied. The results show that the contact deformation, velocity, piecewise nonlinear contact force and acceleration based on MSDOM and ωΩ are effective to calculate the contact response. The contact stiffness, damping, material properties of sphere and elastic modulus of the plate have different influence on the contact response while the Poisson’s ratio ν2 has little effect on it.","PeriodicalId":49185,"journal":{"name":"International Journal of Acoustics and Vibration","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48125312","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: 2

The Exact Frequency Equations for the Euler-Bernoulli Beam Subject to Boundary Damping 边界阻尼作用下Euler-Bernoulli梁的精确频率方程

IF 1 4区工程技术

International Journal of Acoustics and Vibration Pub Date : 2020-06-30 DOI: 10.20855/ijav.2020.25.21574

A. Biselli, M. Coleman

引用次数: 2

Acoustics and Vibration in the Time of the Pandemic 大流行病时期的声学与振动

IF 1 4区工程技术

International Journal of Acoustics and Vibration Pub Date : 2020-06-30 DOI: 10.20855/ijav.2020.25.2e96

J. Arenas

引用次数: 6

Modelling and Dynamic Response Characteristics Study of a PAM Bionic Kangaroo Leg Suspension PAM仿生袋鼠腿悬架建模及动态响应特性研究

IF 1 4区工程技术

International Journal of Acoustics and Vibration Pub Date : 2020-06-30 DOI: 10.20855/ijav.2020.25.21676

S. Yong, Jiahao Shi, Zhanlong Li, Jinyi Lian, Q. Shi, B. Yan

{"title":"Modelling and Dynamic Response Characteristics Study of a PAM Bionic Kangaroo Leg Suspension","authors":"S. Yong, Jiahao Shi, Zhanlong Li, Jinyi Lian, Q. Shi, B. Yan","doi":"10.20855/ijav.2020.25.21676","DOIUrl":"https://doi.org/10.20855/ijav.2020.25.21676","url":null,"abstract":"A PAM (pneumatic artificial muscle) bionic kangaroo leg suspension is proposed on the basis of a kangaroo leg structure evolved from long-term hopping; the modelling and characteristics research are conducted to pursue a high-performance vehicle suspension system. Based on the PAM and kangaroo leg bone proportions, the bionic suspension structure is constructed by analysing and refining the kangaroo leg structure and functions. The dynamic equations are derived by the Lagrange’s Equations considering the rods system features and an Adams simulation model is built up to study the damping performance and parameter characteristics of the suspension. Moreover, a co-simulation of Adams and Matlab is performed under fuzzy control and PID control. The dynamic response characteristics of the suspension is simulated and analysed under the passive and active modes in the time and frequency domains. The result indicates that the vibration and shock of the vehicle body can be reduced effectively by the proposed suspension in passive, fuzzy control and PID control modes; compared with the passive mode, the damping performance of the suspension is better under the active control. The fuzzy control and the PID control are effective to reduce the suspension transmissibility, especially in the medium frequency ranges, and the two control effects are better than that of the passive mode in most frequency bands. The study result of this paper can provide a reference for the research and development of high-performance bionic suspension.","PeriodicalId":49185,"journal":{"name":"International Journal of Acoustics and Vibration","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41808545","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

A Three-Dimensional Lump Model on Performances of the Stapes Displacement under Different Mechanics Property Conditions of a Middle Ear 不同力学性能条件下中耳镫骨位移特性的三维块体模型

IF 1 4区工程技术

International Journal of Acoustics and Vibration Pub Date : 2020-06-30 DOI: 10.20855/ijav.2020.25.21543

Y. Hsieh, Doan Minh Hai, Yue-Lin Hsieh

{"title":"A Three-Dimensional Lump Model on Performances of the Stapes Displacement under Different Mechanics Property Conditions of a Middle Ear","authors":"Y. Hsieh, Doan Minh Hai, Yue-Lin Hsieh","doi":"10.20855/ijav.2020.25.21543","DOIUrl":"https://doi.org/10.20855/ijav.2020.25.21543","url":null,"abstract":"In this article, a three-dimensional (3D) lumped model of the human auditoria peripherals that consisted of four masses equipped with five major springs and major dashpots is presented. This model will support the quantitative basis for construction of a human middle ear physical model. This 3D lumped model consists of a human ear bone model having a similar working principle as the tiny mechanical structure. The 3D lumped model’s parameters were identified using previous anatomical data, and then constructed via a parameter optimizing process using 16 springs and dashpots that represent the tiny mechanical structure’s five connections. The computational results showed the sensitivity priority of the five connections to the stapes displacement with a variety of sound frequencies. Moreover, a detailed discussion of the five connections’ mechanical properties affecting the magnitude of the stapes displacement was also shown in this paper. As a result of increasing the stiffness in the joint of the middle ear bone connection, the stapes’ vibrational amplitude was increased. However, the magnitude of the value of the four masses reacts in a manner that is opposite to stapes displacement. Some specific frequency ranges of the voice properties to the mass and connector systems are also discussed in this paper. The details of the individual mass or joint activity to the stapes displacement at various frequency ranges are also presented. The model’s behaviors were calculated using the software ANSYS workbench 15.0, Solid works 2017, and the MATLAB R2015a. Our findings provide a relevant reference for related medical research.","PeriodicalId":49185,"journal":{"name":"International Journal of Acoustics and Vibration","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48711161","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

Developments in the Design of Centrifugal Pendulum Vibration Absorbers 离心摆式减振器设计的进展

IF 1 4区工程技术

International Journal of Acoustics and Vibration Pub Date : 2020-06-30 DOI: 10.20855/ijav.2020.25.21687

D. Newland

引用次数: 18

Design of a Single and Dual Hybrid Piezoelectric Motors 单、双混合压电电机的设计

IF 1 4区工程技术

International Journal of Acoustics and Vibration Pub Date : 2020-06-30 DOI: 10.20855/ijav.2020.25.21649

Y. Ting, K. Chang, Chih-Hsuan Yu, Amelia Sugondo

{"title":"Design of a Single and Dual Hybrid Piezoelectric Motors","authors":"Y. Ting, K. Chang, Chih-Hsuan Yu, Amelia Sugondo","doi":"10.20855/ijav.2020.25.21649","DOIUrl":"https://doi.org/10.20855/ijav.2020.25.21649","url":null,"abstract":"In this paper, a new hybrid piezoelectric motor was developed. A range of degeneracy was found to obtain multiple choice of resonance frequency by adjusting the length of the elastic blocks neighboring to the longitudinal and torsional vibrators. A template was implemented in between the longitudinal and torsional vibrators to decrease the mutual vibration effect that effectively makes the calculated and actual driving frequency nearly close. Such configuration was instrumental to preserve the expected performance and reduce the trial-and-error design overhaul process of the elastic blocks. Moreover, a dual hybrid motor was easily formed by butting each stator of the two hybrid motors together with a rotor in the middle. Case studies of both single and dual hybrid motors are presented with both simulation and experimental results to demonstrate the structure design and the degeneracy approach. Besides the convenience of structurally combining two single hybrid motors to enhance the output, it was interesting to find out whether the proposed dual hybrid motor can significantly increase either the speed or torque by using different phase control methods. Therefore, using the dual hybrid motor provides a great advantage by providing an option for pursuing higher speed or larger torque output for certain applications.","PeriodicalId":49185,"journal":{"name":"International Journal of Acoustics and Vibration","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44220606","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

Tuning a Two-Chamber Muffler for Wide-Band Transmission Loss 宽频带传输损耗双腔消声器的调谐

IF 1 4区工程技术

International Journal of Acoustics and Vibration Pub Date : 2020-06-30 DOI: 10.20855/ijav.2020.25.21666

M. Munjal

{"title":"Tuning a Two-Chamber Muffler for Wide-Band Transmission Loss","authors":"M. Munjal","doi":"10.20855/ijav.2020.25.21666","DOIUrl":"https://doi.org/10.20855/ijav.2020.25.21666","url":null,"abstract":"The design of a muffler with wide-band transmission loss (TL) is a basic requirement for automotive exhaust systems where the exhaust noise is spread over several harmonics of the engine firing frequency. This has led to the concept of a double-tuned expansion chamber. In the present paper, the concept of double-tuning is extended to the two-chamber mufflers. The author’s classical Velocity Ratio Algorithm is used here to analyze and design such a muffler. The relevant two-row array is manipulated and simplified to arrive directly at the single most significant term out of the 81 non-dimensional terms constituting the relevant Velocity Ratio. Examination of this single term reveals acoustics of the raised wide-band domes of the TL spectrum of the double-tuned two-chamber (DT2C) muffler vis-a-vis that of an equivalent longer double-tuned single-chamber muffler. Except for a low-frequency trough, its TL curve covers the entire frequency range of interest for control of automotive exhaust noise. It is also shown that the corresponding side-inlet side-outlet (SISO) DT2C muffler configuration has an identically similar wide-band TL spectrum to that of the co-axial muffler configuration. Finally, some guidelines are laid out for designing a DT2C muffler.","PeriodicalId":49185,"journal":{"name":"International Journal of Acoustics and Vibration","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44076907","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

Dynamic Characteristics of an Elastic Structure with Thermal Effects 具有热效应的弹性结构的动力特性

IF 1 4区工程技术

International Journal of Acoustics and Vibration Pub Date : 2020-06-30 DOI: 10.20855/ijav.2020.25.21578

Guanhua Xu, Jianzhong Fu, W. He, Yuetong Xu, Zhiwei Lin, Bang-ping Gu, Jiafu Zhang

引用次数: 1

Sound Attenuation Study of Micro-Scale Acoustic Package 微尺度声学封装的声衰减研究

IF 1 4区工程技术

International Journal of Acoustics and Vibration Pub Date : 2020-06-30 DOI: 10.20855/ijav.2020.25.21453

Fu-Shyang Chang, G. Flowers, R. Dean, J. Suhling, J. Roberts

引用次数: 0