Journal of Sound and Vibration最新文献_第5页

Optimal trajectory planning of space flexible-link manipulator based on singular perturbation theory 基于奇异摄动理论的空间柔性连杆机械臂最优轨迹规划

IF 4.3 2区工程技术

Journal of Sound and Vibration Pub Date : 2025-05-26 DOI: 10.1016/j.jsv.2025.119242

Shihao Ni, Weidong Chen, Zhengtao Wei, Caoqun Luo, Ti Chen

{"title":"Optimal trajectory planning of space flexible-link manipulator based on singular perturbation theory","authors":"Shihao Ni, Weidong Chen, Zhengtao Wei, Caoqun Luo, Ti Chen","doi":"10.1016/j.jsv.2025.119242","DOIUrl":"10.1016/j.jsv.2025.119242","url":null,"abstract":"<div><div>In this paper, a computationally efficient joint trajectory planning method for a space flexible-link manipulator is proposed based on the Singular Perturbation (SP) theory. The dynamic coupling of the space flexible-link manipulator is decomposed into the coupling between the rigid motions of the base and link, and the coupling between the rigid motion and the flexible vibration according to the SP theory. The dynamic coupling between the base and the link is used to adjust the position and attitude of the base and the link vibration is reduced based on the coupling between the rigid motion and flexible vibration. According to SP theory, the rigid motion of the base is approximated by its quasi-steady state value. A low frequency vibration around quasi-steady state value of link vibration is obtained and used to approximate the dynamic behavior of link vibration within fast time scale. On this basis, two novel objective functions of minimizing vibration during motion and residual vibration are constructed. Since the calculation of high-frequency vibration is avoided, the efficiency of the trajectory optimization method is greatly improved. Particle Swarm Optimization (PSO) algorithm is adopted to realize multi-objective optimization. Numerical simulations are performed to verify the vibration reduction effect and ability of achieving multi-objective optimization of the proposed method. Moreover, experiments are conducted to further validate the vibration reduction effect of the proposed method.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"617 ","pages":"Article 119242"},"PeriodicalIF":4.3,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144212319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

High-precision model and open-source software for acoustic backscattering by liquid- and gas-filled prolate spheroids across a wide frequency range and incident angles: Implications for fisheries acoustics 在宽频率范围和入射角上由液体和气体填充的长形球体进行声学后向散射的高精度模型和开源软件：对渔业声学的影响

IF 4.3 2区工程技术

Journal of Sound and Vibration Pub Date : 2025-05-24 DOI: 10.1016/j.jsv.2025.119227

Babak Khodabandeloo , Yngve Heggelund , Bjørnar Ystad , Sander Andre Berg Marx , Geir Pedersen

{"title":"High-precision model and open-source software for acoustic backscattering by liquid- and gas-filled prolate spheroids across a wide frequency range and incident angles: Implications for fisheries acoustics","authors":"Babak Khodabandeloo , Yngve Heggelund , Bjørnar Ystad , Sander Andre Berg Marx , Geir Pedersen","doi":"10.1016/j.jsv.2025.119227","DOIUrl":"10.1016/j.jsv.2025.119227","url":null,"abstract":"<div><div>Among the few geometries with analytical scattering solutions, the prolate spheroid is perhaps one of the best representative models for various marine organisms or their dominant scattering organs. The mathematical formulation for the exact solution of scattering from prolate spheroids is well-established and known. However, solving these equations presents challenges, including difficulties in efficiently and stably estimating prolate spheroidal wave functions (PSWFs), handling numerical overflow or underflow, and addressing ill-conditioned systems of equations. These issues are addressed in this work, and the model provides stable and precise solutions for both gas- and liquid-filled prolate spheroids across all incident angles and over a wide frequency range. Additionally, the required number of terms to truncate the infinite series of scattering modes is investigated, and empirical formulas are provided. The calculated backscattering results are validated for aspect ratios (i.e., ratio of the longest to the shortest dimension of the prolate spheroid) of up to 10 by comparison with those estimated using finite element methods (FEM). An open-source software package developed with Python and Fortran, is provided alongside this paper.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"616 ","pages":"Article 119227"},"PeriodicalIF":4.3,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144203204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Micro-perforated rainbow-trapping silencers with broadband sound dissipation and reduced drag under low-speed grazing flow 低速掠流条件下具有宽频散声和减阻特性的微孔彩虹捕获消声器

IF 4.3 2区工程技术

Journal of Sound and Vibration Pub Date : 2025-05-24 DOI: 10.1016/j.jsv.2025.119228

Cédric Maury , Teresa Bravo , Fawad Ali

{"title":"Micro-perforated rainbow-trapping silencers with broadband sound dissipation and reduced drag under low-speed grazing flow","authors":"Cédric Maury , Teresa Bravo , Fawad Ali","doi":"10.1016/j.jsv.2025.119228","DOIUrl":"10.1016/j.jsv.2025.119228","url":null,"abstract":"<div><div>The aeroacoustic optimization of rainbow trapping silencers (RTS) shielded from a low-speed turbulent flow by a micro-perforated panel (MPP) has been hardly explored in order to achieve simultaneous high broadband dissipation and low friction factor. Direct global optimization from aeroacoustic numerical models is still cumbersome. A cost-efficient hybrid optimization process is proposed based on maximization of the total dissipated power calculated from a Transfer Matrix Model (TMM) under downstream propagation conditions subject to an aerodynamic constraint on the MPP holes pitch and diameter based on RANS-Realizable <em>k – ε</em> parametric study. The TMM is validated against Large Eddy Simulations at global scale on the scattering properties of the MPP<strong>-</strong>RTS, but also at MPP hole scale, pointing out the key role played by in-hole vortical patterns in the dissipation mechanism and the flow-induced reduction of air mass at the wetted inlet of MPP holes. The hybrid optimization approach shows that a common set of MPP<strong>-</strong>RTS parameters are able to provide both high dissipation, slow sound and low drag performance in Darcy regime. Aeroacoustic measurements in a low-speed wind tunnel on a hybrid-optimized MPP<strong>-</strong>RTS prototype corroborate the maximum total dissipation objective and friction factor constraint. Downstream and upstream propagation conditions are found to respectively reduce and enlarge towards low and high frequencies the efficiency range of MPP<strong>-</strong>RTS whereby high dissipation and attenuation effects are prominent and occur well below that of unshielded RTS.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"616 ","pages":"Article 119228"},"PeriodicalIF":4.3,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144190074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Thermal vibration analysis of cables in tensegrity during space deployment 空间展开过程中张拉整体索的热振动分析

IF 4.3 2区工程技术

Journal of Sound and Vibration Pub Date : 2025-05-23 DOI: 10.1016/j.jsv.2025.119208

Haoran Zou , Luisa Boni , zeyu Fu , Alessandro A Quarta , Fei Han , Zichen Deng

引用次数: 0

Vibrations of gyroscopic continua: Rotating structures and axially moving structures 陀螺连续体的振动：旋转结构和轴向运动结构

IF 4.3 2区工程技术

Journal of Sound and Vibration Pub Date : 2025-05-22 DOI: 10.1016/j.jsv.2025.119225

Xiao-Dong Yang , Yi-Bo Wang , Ying-Jing Qian

{"title":"Vibrations of gyroscopic continua: Rotating structures and axially moving structures","authors":"Xiao-Dong Yang , Yi-Bo Wang , Ying-Jing Qian","doi":"10.1016/j.jsv.2025.119225","DOIUrl":"10.1016/j.jsv.2025.119225","url":null,"abstract":"<div><div>Gyroscopes, rotors, blades, axially moving structures, and pipes conveying fluid, have been widely applied in engineering fields such as aviation, aerospace, and other industries. These structures and devices belong to the class of gyroscopic continua. Gyroscopic continua, subjected to gyroscopic effects, exhibit significant non-self-adjoint properties, which complicate the analysis of the natural properties of the system. In this review, the vibration investigations of gyroscopic continua, both rotating structures and axially moving structures, are surveyed and discussed. Through kinetic energy analysis, the different genesis of gyroscopic terms in both axially moving and rotating structures have been compared. Gyroscopic continua are categorized into two types in this paper: rotating continua, axially moving continua. Representative governing equations for various types of continua are reviewed. All the mode analysis of gyroscopic continua yields complex modal solutions. The paper focuses on analyzing the impact of centrifugal effects, gyroscopic coupling, and nonlinear effects on the governing equations and modal parameters, where frequency bifurcation and traveling wave modes are classical characteristics of gyroscopic systems. In addition, the stability and practical engineering applications of gyroscopic continua are reviewed in terms of axially moving continua and continua with distributed gyros, respectively. Lastly, the paper offers some suggestions for future research directions in this field.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"616 ","pages":"Article 119225"},"PeriodicalIF":4.3,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144185447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Energy-based vibration reduction analysis of frame with tuned mass damper connected to pre-stretched SMA springs under limitation of displacement 位移限制下预拉伸SMA弹簧连接的调谐质量阻尼器框架基于能量的减振分析

IF 4.3 2区工程技术

Journal of Sound and Vibration Pub Date : 2025-05-22 DOI: 10.1016/j.jsv.2025.119214

Hongwang Lv , Bin Huang , Xiaomeng Lv , Zhifeng Wu , Heng Zhang

{"title":"Energy-based vibration reduction analysis of frame with tuned mass damper connected to pre-stretched SMA springs under limitation of displacement","authors":"Hongwang Lv , Bin Huang , Xiaomeng Lv , Zhifeng Wu , Heng Zhang","doi":"10.1016/j.jsv.2025.119214","DOIUrl":"10.1016/j.jsv.2025.119214","url":null,"abstract":"<div><div>When the stroke of mass block is restricted due to the limitation of space in a real structure, the damping effectiveness of tuned mass damper (TMD) will be limited. In this situation, it is crucial to maintain a good damping effect of the TMD damper on a main structure. To achieve this goal, this paper develops a new nonlinear TMD damper to suppress the vibration of the frame structure, in which the mass block is connected to pre-stretched superelastic SMA springs and equipped with a displacement-limit device. This new TMD damper fully utilizes the energy dissipation advantages of both the pre-stretched SMA springs and the displacement-limit device attached with an additional viscoelastic material. At first, the motion equation of the structure attached with the new nonlinear TMD damper is established and the mechanical model of the frame system is verified by shaking table tests. Afterwards the parameters of the displacement-limit device and the pounding gap are optimized through minimizing the discrepancy between the mean value of maximum input energy in the structure with the new damper and that with the TMD damper equipped with only the SMA springs. During the optimization, the pounding force is restricted to an acceptable value. The numerical results show that the control performances of the new nonlinear damper and the TMD damper with only the pre-stretched SMA springs are almost the same. No matter which TMD damper is used, the identical input energy will lead to the same peak responses of the frame. Compared with the pounding TMD, because of the replacement of the linear steel springs with the pre-stretched SMA springs, the proposed damper can increase the reduction ratio of peak responses by 16.4 % in some cases. And the maximum impact force on average is reduced by about 33 %, which is significant to protect the displacement-limit device.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"616 ","pages":"Article 119214"},"PeriodicalIF":4.3,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Adaptive far-field spatial-temporal sound prediction using attentive one-dimensional U-Net 基于关注一维U-Net的自适应远场时空声预测

IF 4.3 2区工程技术

Journal of Sound and Vibration Pub Date : 2025-05-21 DOI: 10.1016/j.jsv.2025.119224

Chao Liang , Francesco Ripamonti , Hamid Reza Karimi , Stanisław Wrona , Marek Pawełczyk

引用次数: 0

A fast equivalent source method for thermoviscous acoustic problems based on hierarchical matrices 基于层次矩阵的热粘性声学问题快速等效源方法

IF 4.3 2区工程技术

Journal of Sound and Vibration Pub Date : 2025-05-20 DOI: 10.1016/j.jsv.2025.119186

Meng-Hui Liang, Chang-Jun Zheng, Yong-Bin Zhang, Liang Xu, Shuai Wang, Chuan-Xing Bi

{"title":"A fast equivalent source method for thermoviscous acoustic problems based on hierarchical matrices","authors":"Meng-Hui Liang, Chang-Jun Zheng, Yong-Bin Zhang, Liang Xu, Shuai Wang, Chuan-Xing Bi","doi":"10.1016/j.jsv.2025.119186","DOIUrl":"10.1016/j.jsv.2025.119186","url":null,"abstract":"<div><div>In the simulation of the characteristics of acoustic microstructures, thermoviscous effects are critically important. Recently, an equivalent source method (ESM) has been developed for solving acoustic problems involving thermoviscous effects. This method eliminates the need of fine boundary layer meshing, and only requires the discretization of the structure’s surface, thereby reducing computational requirements. However, the computational resources required by the ESM, such as memory storage and solution time, remain considerable for complex geometries like metamaterials and topology optimization of acoustic microstructures. To tackle this issue, the hierarchical off-diagonal low-rank matrix is utilized to develop a fast equivalent source method (FESM). Additionally, the hierarchical low-rank merge technique is further adopted to ensure the computational efficiency of the proposed FESM in situations where the low-rank approximation algorithm is ineffective. Numerical examples with analytical solution validate the precision and efficiency of the FESM.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"615 ","pages":"Article 119186"},"PeriodicalIF":4.3,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144106391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Uncertainty in frequency response function estimates in experimental modal analysis 实验模态分析中频响函数估计的不确定性

IF 4.3 2区工程技术

Journal of Sound and Vibration Pub Date : 2025-05-19 DOI: 10.1016/j.jsv.2025.119168

Mikkel Tandrup Steffensen , Dmitri Tcherniak , Jon Juel Thomsen

{"title":"Uncertainty in frequency response function estimates in experimental modal analysis","authors":"Mikkel Tandrup Steffensen , Dmitri Tcherniak , Jon Juel Thomsen","doi":"10.1016/j.jsv.2025.119168","DOIUrl":"10.1016/j.jsv.2025.119168","url":null,"abstract":"<div><div>In experimental modal analysis, the estimation of frequency response functions is based on input and output measurements, which are prone to uncertainty due to noise. Different estimators exist, such as <span><math><msub><mrow><mi>H</mi></mrow><mrow><mi>1</mi></mrow></msub></math></span>, <span><math><msub><mrow><mi>H</mi></mrow><mrow><mi>2</mi></mrow></msub></math></span>, etc. Which estimator to use depends solely on the experimental setup, as the estimators have different statistical properties in different setups. This work presents covariance expressions for real and imaginary parts of different frequency response function estimators: <span><math><msub><mrow><mi>H</mi></mrow><mrow><mi>1</mi></mrow></msub></math></span>, <span><math><msub><mrow><mi>H</mi></mrow><mrow><mi>2</mi></mrow></msub></math></span>, and <span><math><msub><mrow><mi>H</mi></mrow><mrow><mi>v</mi></mrow></msub></math></span>. The covariance expressions are obtained by propagating the uncertainty from measurements. Different techniques to identify the uncertainty from measurements are briefly presented before the covariance expressions for each estimator are developed. These covariance expressions for the considered estimators are structured identically, and a general expression to propagate the uncertainty from the real and imaginary parts to the amplitude and phase is developed and presented. The covariance expressions are developed using the Delta-method, where the Jacobians are obtained using first-order perturbation theory. The expressions are validated using a simple 6-DoF simulated mass–spring system and Monte-Carlo simulation. The validation shows good agreement between the estimated uncertainties using the developed covariance expressions and the uncertainties from the Monte-Carlo simulations when the measurement uncertainty is adequately identified. The application of the derived uncertainty expressions is illustrated using excitation and response data from an experiment conducted on a beam-like structure.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"614 ","pages":"Article 119168"},"PeriodicalIF":4.3,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144117090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Rotor/stator interaction noise prediction in C-shaped duct with lifting surface method 用升力面法预测c型风管动静噪声

IF 4.3 2区工程技术

Journal of Sound and Vibration Pub Date : 2025-05-17 DOI: 10.1016/j.jsv.2025.119175

Shijun Zeng , Guangyu Zhang , Xiaoyu Wang , Feng Gao , Xiaofeng Sun

{"title":"Rotor/stator interaction noise prediction in C-shaped duct with lifting surface method","authors":"Shijun Zeng , Guangyu Zhang , Xiaoyu Wang , Feng Gao , Xiaofeng Sun","doi":"10.1016/j.jsv.2025.119175","DOIUrl":"10.1016/j.jsv.2025.119175","url":null,"abstract":"<div><div>To comply with the rigorous constraints imposed on nacelle length in Ultra-High Bypass Ratio (UHBR) engines, bifurcations that were conventionally positioned downstream of the fan stage are integrated into the outlet guide vanes (OGVs). Consequently, the rearward fan noise is strongly affected by the bifurcations, as the azimuthal uniformity of OGV is disrupted and the aft-fan duct is partitioned into two C-shaped ducts. This impact is investigated using lifting surface method, assuming that the duct is infinitely long with a constant C-shaped cross-section, and the flow is uniform neglecting the distortion caused by bifurcations. Through the incorporation of a tailored Green’s function, the bifurcations are modeled as sound reflection boundaries. Subsequently, the unsteady loading on the vanes and the rearward sound power are calculated and compared against those in the annular duct. Analysis reveals that multiple azimuthal modes are scattered, resulting in a hump-shaped mode distribution. The radial mode distribution is found to be intimately related to the radial obliquity of rotor wake. The unsteady loading on different vanes shows diverse yet similar distribution after reducing the difference in the inter-blade phase angle (IBPA). These findings should contribute to the noise prediction and acoustic design of UHBR fan featured by integrated OGV and C-shaped aft-fan duct.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"615 ","pages":"Article 119175"},"PeriodicalIF":4.3,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144106392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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