Journal of Sound and Vibration最新文献_第4页

Vibration-weighted maximum correlated kurtosis deconvolution and latent cyclic pattern discovery for fault diagnosis of high-speed rail bogies 振动加权最大相关峰度反褶积及潜在循环模式发现用于高速铁路转向架故障诊断

IF 4.9 2区工程技术 Q1 ACOUSTICS

Journal of Sound and Vibration

Pub Date : 2026-04-14 Epub Date: 2026-01-11 DOI: 10.1016/j.jsv.2026.119657

Peng Chen , Yuhao Wu , Junxiao Ma , Ruijin Zhang , Ge Xin , Changbo He

Real-world high-speed rail bogie vibration signals combine mechanical oscillations, deterministic periodic components (e.g., gear-mesh harmonics and wheel-rail interactions), environmental noise, and transients, making fault features hard to isolate. Diagnosis is further hindered by manual hyperparameter tuning, weak impulsive signatures at low Signal-to-Noise Ratio (SNR), overlapping spectral-temporal content with mode mixing, and high computational cost on long multi-channel records. We propose a multi-source vibration demodulation framework–an optimized Maximum Correlated Kurtosis Deconvolution (MCKD) with vibration-weighted grading distribution and Latent Cyclic Pattern Discovery (LCPD). The method couples spectral-negentropy-driven adaptivity for Minimum Entropy Deconvolution (MED)/MCKD filter length and regularization with wavelet-packet multiscale decomposition guided by correlation-kurtosis band selection, and periodic dynamic windows with a Vibration Amplitude-based Grading and Weighting Distribution (VAGWD), enabling adaptive deconvolution, enhanced weak-impulse extraction, and cycle-synchronous separation and quantification without empirical tuning. The LCPD module exploits envelope-cepstral cues, squared-envelope autocorrelation, and cyclic spectral coherence to recover hidden or time-warped periodicities under compound-fault conditions. Experiments on bogie datasets show higher diagnostic accuracy, greater noise robustness, and improved computational efficiency than MED, Multipoint Optimal Minimum Entropy Deconvolution Adjusted (MOMEDA), and baseline MCKD, enabling reliable and efficient compound-fault diagnosis in high-speed rail bogies.

现实世界的高速铁路转向架振动信号结合了机械振荡、确定性周期性分量（如齿轮啮合谐波和轮轨相互作用）、环境噪声和瞬态，使得故障特征难以分离。人工超参数调谐、低信噪比（SNR）下的弱脉冲特征、模式混合的频谱时间内容重叠以及长多通道记录的高计算成本进一步阻碍了诊断。我们提出了一种多源振动解调框架——具有振动加权分级分布和潜在循环模式发现（LCPD）的优化最大相关峰度反卷积（MCKD）。该方法结合了光谱负熵驱动的最小熵反褶积(MED)/MCKD滤波器长度的自适应特性和相关峰度波段选择指导的小波包多尺度分解的正则化特性，以及基于振动幅值的分级和加权分布（VAGWD）的周期性动态窗口，实现了自适应反褶积、增强的弱脉冲提取以及无需经验调谐的周期同步分离和量化。LCPD模块利用包络-倒谱信号、平方包络自相关和循环频谱相干性来恢复复合故障条件下隐藏或时间扭曲的周期性。在转向架数据集上的实验表明，与MED、多点最优最小熵反卷积调整（MOMEDA）和基线MCKD相比，该方法具有更高的诊断精度、更强的噪声鲁棒性和更高的计算效率，可实现可靠、高效的高速铁路转向架复合故障诊断。

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引用次数: 0

Register jumps on the clarinet: numerical and in-vitro investigation into basins of attraction and phase-tipping 单簧管上的音域跳跃：吸引力和相位倾斜盆地的数值和体外研究

IF 4.9 2区工程技术 Q1 ACOUSTICS

Journal of Sound and Vibration

Pub Date : 2026-03-31 Epub Date: 2025-12-09 DOI: 10.1016/j.jsv.2025.119579

Nathan Szwarcberg , Tom Colinot , Christophe Vergez , Michaël Jousserand , Léonie Maignan , Anthia Patsinakidou , Giordano Gatti , Hrant Arzumanyan , Pedro Faria Oliveira Morais

When playing the clarinet, opening the register hole allows for a transition from the first to the second register, producing a twelfth interval. On an artificial player system, the blowing pressure range where the second register remains stable can be determined by gradually varying the blowing pressure while keeping the register hole open. However, when the register hole is opened while the instrument is already producing the first register, the range of blowing pressures that lead to a stable second register is narrower than the full stability zone of the second register. This phenomenon is investigated numerically by performing multiple hole openings at different times, for various values of the blowing pressure and the embouchure parameter. In some narrow regions of the control parameters space, the success of a register transition depends on the phase at which the hole is opened. This illustrates an instance of phase-tipping, where the limit cycle of the closed-hole regime may intersect multiple basins of attraction associated with the open-hole regimes. Furthermore, to assess the robustness of the basins of attraction, random noise is introduced to the control parameters before the register hole is opened. Results indicate that the equilibrium regime is more robust to noise than the other oscillating regimes. Finally, long-lasting transient quasiperiodics are investigated. The phase at which the hole is opened influences both the transient duration and the resulting stable regime.

当演奏单簧管时，打开音域孔允许从第一音域过渡到第二音域，产生第十二音程。在人工唱机系统上，第二唱机保持稳定的吹风压力范围可以通过在保持唱机孔打开的情况下逐渐改变吹风压力来确定。然而，当仪器已经产生第一寄存器时打开寄存器孔时，导致稳定的第二寄存器的吹压范围比第二寄存器的完全稳定区域窄。在不同的吹风压力和喷口参数下，在不同的时间进行多次开孔，对这一现象进行了数值研究。在控制参数空间的某些狭窄区域，寄存器跃迁的成功取决于开孔的相位。这说明了相倾的一个例子，其中闭孔状态的极限环可能与与裸眼状态相关的多个吸引力盆地相交。此外，为了评估吸引盆地的鲁棒性，在打开登记孔之前将随机噪声引入控制参数。结果表明，该平衡区对噪声的鲁棒性优于其他振荡区。最后，研究了长时间瞬态准周期。开孔时的相位既影响瞬态持续时间，也影响由此产生的稳定状态。

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引用次数: 0

Scaling Up 3D elastic metamaterials with ultrawide band gaps: A modular approach with weight compensation 具有超宽带隙的三维弹性超材料：具有重量补偿的模块化方法

IF 4.9 2区工程技术 Q1 ACOUSTICS

Journal of Sound and Vibration

Pub Date : 2026-03-31 Epub Date: 2026-01-07 DOI: 10.1016/j.jsv.2026.119641

Berkay Acar, Sedef Nisan Otlu, Zafer Gokay Tetik, Cetin Yilmaz

Size plays a crucial role in designing and realizing 3D phononic crystals and elastic metamaterials with ultrawide band gaps. Existing 3D designs with normalized bandwidth larger than 133.3% are typically fabricated from polymers by additive manufacturing in small sizes (lattice constant  ≤  50 mm). Achieving large bandwidths often requires thin ligaments (flexures), which can fail or deform significantly under self-weight when scaled up, affecting unit cell shape and normalized bandwidth. To mitigate stress and deformation problems at larger scales, a modular design is introduced, enabling separate production of high and low stress-bearing components for assembly. A 3D truss-like structure is formed using steel inertial amplification mechanisms as 600 mm truss elements. Optimization yields a wide stop band but results in thin flexures within these mechanisms. To minimize the stresses and deformations in the inertially amplified 3D truss structure, which weighs more than 100 kg, static weight compensation technique is proposed in which some of the flexures are prestressed to a targeted value before assembly. Consequently, very small static deflection is observed due to self-weight. The optimized 3D truss structure is manufactured and tested. It is revealed that the optimized design provides a complete ultrawide stop band for 3D excitations between 6.2 - 87.8 Hz. Despite the large size and weight, and the stress constraints, an ultrawide band gap (173.6%) is attained.

尺寸是设计和实现三维声子晶体和具有超宽带隙的弹性超材料的关键因素。现有的归一化带宽大于133.3%的3D设计通常是由小尺寸的聚合物通过增材制造制造的（晶格常数 ≤ 50 mm）。实现大带宽通常需要细韧带（屈曲），当按比例放大时，其在自重下可能会失效或变形，从而影响单元胞的形状和归一化带宽。为了减轻更大规模的应力和变形问题，引入了模块化设计，可以单独生产高应力和低应力轴承组件进行组装。采用钢惯性放大机构作为600 mm桁架单元，形成三维桁架结构。优化产生宽止动带，但导致这些机构内的薄挠曲。为了使重量超过100 kg的惯性放大三维桁架结构的应力和变形最小化，提出了静态重量补偿技术，在装配前将部分挠度预应力到目标值。因此，由于自重，观察到非常小的静态偏转。对优化后的三维桁架结构进行了制造和试验。结果表明，优化后的设计在6.2 ~ 87.8 Hz范围内提供了一个完整的超宽止动带。尽管尺寸和重量较大，并且受到应力限制，但仍获得了超宽的带隙（173.6%）。

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引用次数: 0

Serration manufacturing effects on propeller trailing edge noise mechanisms 锯齿加工对螺旋桨尾缘噪声机理的影响

IF 4.9 2区工程技术 Q1 ACOUSTICS

Journal of Sound and Vibration

Pub Date : 2026-03-31 Epub Date: 2026-01-10 DOI: 10.1016/j.jsv.2026.119656

Jorge Santamaria , Sylvain Belliot , Marlène Sanjosé , Romain Gojon , Stéphane Moreau

Trailing edge noise is an important broadband noise source of hovering UAV rotors, which can be reduced by trailing edge serrations. Ayton’s theoretical model provides predictions for serrated trailing edge noise generated by a fully turbulent flow over an infinitesimally thin plane. This study assesses the validity of these assumptions by considering the effects of serration installation and manufacturing. Several propellers of the same design were 3D printed and tested in an anechoic room, where far-field noise and aerodynamic performances were collected. The baseline configuration exhibits clear evidence of laminar boundary-layer instability noise. Cut-in and add-on serrations alleviate this noise mechanism. Similarly, to overcome the influence of laminar to turbulent transition over the blade surface, some propellers also include additional tripping elements to trigger the turbulence. Cut-in serrations experience additional vortex-shedding noise characterized by a Strouhal number based on the serration root thickness. The results show that serrations are a viable method to control trailing edge noise at low RPM, where broadband noise dominates over tonal noise. Finally, the analytical predictions successfully capture the noise reduction trends for the add-on serrations. In particular, the model can capture their frequency range of effectiveness and the relative variation of the mitigation with rotational speed. There is better agreement between the model and the experiments for the design that includes tripping. This outcome highlights the importance of considering the manufacturing method during the design phase.

后缘噪声是悬停无人机旋翼中一个重要的宽带噪声源，可通过后缘锯齿减小后缘噪声。艾顿的理论模型提供了在无限小的薄平面上完全紊流产生的锯齿状尾缘噪声的预测。本研究通过考虑齿轮安装和制造的影响来评估这些假设的有效性。几个相同设计的螺旋桨进行了3D打印，并在消声室进行了测试，在那里收集了远场噪声和空气动力学性能。基线结构显示出层流边界层不稳定噪声的明显证据。插入式和附加式齿形可以减轻这种噪音机制。同样，为了克服叶片表面层流到湍流过渡的影响，一些螺旋桨还包括额外的脱扣元件来触发湍流。切割锯齿会经历额外的旋涡脱落噪声，其特征是基于锯齿根部厚度的斯特罗哈尔数。结果表明，在低转速下，宽带噪声比音调噪声占主导地位，锯齿是一种可行的控制后缘噪声的方法。最后，分析预测成功地捕获了附加服务的降噪趋势。特别是，该模型可以捕获它们的有效频率范围和减缓随转速的相对变化。对于包含跳闸的设计，模型与实验结果吻合较好。这一结果突出了在设计阶段考虑制造方法的重要性。

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引用次数: 0

Corrigendum to “Effects of non-uniform temperature field, mean flow, and noise on nonlinear thermoacoustic instabilities” [Journal of Sound and Vibration 624 (2026) 119498] “非均匀温度场、平均流和噪声对非线性热声不稳定性的影响”的更正[声音与振动杂志]624 (2026)119498]

IF 4.9 2区工程技术 Q1 ACOUSTICS

Journal of Sound and Vibration

Pub Date : 2026-03-31 Epub Date: 2025-12-27 DOI: 10.1016/j.jsv.2025.119623

Jiasen Wei , Sadaf Arabi

引用次数: 0

Inverse bandgap design and vibration response control of periodically supported pipeline 周期支撑管道逆带隙设计与振动响应控制

IF 4.9 2区工程技术 Q1 ACOUSTICS

Journal of Sound and Vibration

Pub Date : 2026-03-31 Epub Date: 2025-12-12 DOI: 10.1016/j.jsv.2025.119611

Lin Zhang , Tao Zhang , Huajiang Ouyang , Tianyun Li , Haotian Chen

Periodically supported pipelines typically have distinct bandgap properties, which have been exploited to suppress the excessive or unwanted vibration of fluid-filled pipeline systems. However, a mismatch between a pipeline system’s bandgap and the excitation frequency could lead to poor vibration control of well-designed bandgaps. Hence, this paper proposes a new inverse design method for the bandgap of a fluid-filled pipeline system with periodic elastic supports. In this method, the unit cell of the pipeline system is no longer a typical single-span pipe segment but is redefined to be a multi-span pipe segment, and the bandgap redesign of the pipeline system is recast as a stiffness modification problem for the elastic supports. Optimal stiffness modifications are directly obtained by maximizing the vibration amplitude attenuation at discrete excitation frequencies, which can be determined using the receptance method. A major advantage of the proposed method is that only the geometry and material parameters of the pipeline system are required to be known, neither needing to establish its numerical model with fine finite element meshes or involving time-consuming sample calculations. The effectiveness of the proposed method is demonstrated on the numerical model and experimental setup of a periodically supported pipeline system. This study is the first attempt to control the vibration amplitudes of an industrial pipeline at two excitation frequencies by simultaneously realizing two desired bandgaps.

周期性支撑管道通常具有独特的带隙特性，可用于抑制充液管道系统的过度或不必要的振动。然而，管道系统的带隙与激励频率之间的不匹配可能导致设计良好的带隙的振动控制不佳。为此，本文提出了一种具有周期弹性支承的充液管道系统带隙反设计方法。该方法将管道系统的单元胞不再是典型的单跨管段，而是重新定义为多跨管段，并将管道系统的带隙重新设计转化为弹性支承的刚度修正问题。在离散激励频率下，通过最大化振动幅值衰减直接获得最优的刚度修正，这可以用接收法确定。该方法的一个主要优点是只需要知道管道系统的几何和材料参数，既不需要用精细的有限元网格建立其数值模型，也不需要耗时的样本计算。通过周期支撑管道系统的数值模型和实验验证了该方法的有效性。本研究首次尝试通过同时实现两个期望的带隙来控制工业管道在两个激励频率下的振动幅值。

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引用次数: 0

Vision-based dynamic mode decomposition of 3-RRR parallel manipulator with flexible links 基于视觉的柔性连杆3-RRR并联机械臂动态模态分解

IF 4.9 2区工程技术 Q1 ACOUSTICS

Journal of Sound and Vibration

Pub Date : 2026-03-31 Epub Date: 2025-12-19 DOI: 10.1016/j.jsv.2025.119621

Dingxu Guo , Xiuting Sun , Jian Xu , Shu Zhang

Dynamic modeling of parallel manipulator with flexible links (PMFL) based on the assumed mode method (AMM) is highly sensitive to the selection of mode shapes, which significantly influences the dynamic characteristics of the system. To address this challenge, this study investigates the 3-RRR PMFL experimental testbed and applies dynamic mode decomposition (DMD) for modal analysis using visual data. To tackle the limitations of standard DMD in handling system with external inputs, an alternative temporal evolution approach is proposed, enhancing reconstruction accuracy and preserving frequency separation of extracted modes. Additionally, an energy-based criterion for mode re-ranking is introduced to evaluate the energy contributions of different DMD modes, and sparse identification is employed to derive symbolic expressions for dominant mode shapes. Experimentally, instead of traditional hammer excitation, two typical operations are analyzed. Principal component analysis (PCA) is used to extract the dominant vibration direction of visual data, which serves as input for DMD analysis. Results reveal that DMD effectively separates vibration modes from the motion-deformation coupling displacement, outperforming proper orthogonal decomposition (POD) in interpretability. The findings provide valuable insights into mode shape selection in AMM modeling and offer a foundation for parameter analysis and controller design.

基于假设模态法（AMM）的柔性并联机构动力学建模对模态振型的选择非常敏感，对系统的动态特性有重要影响。为了解决这一挑战，本研究研究了3-RRR PMFL实验试验台，并利用视觉数据应用动态模态分解（DMD）进行模态分析。针对标准DMD在处理具有外部输入的系统时的局限性，提出了一种替代的时间演化方法，提高了重构精度并保持了提取模态的频率分离。此外，引入了基于能量的模态重排序准则来评估不同DMD模态的能量贡献，并采用稀疏识别方法推导了主模态振型的符号表达式。实验分析了两种典型的激励方式，取代了传统的锤击激励方式。采用主成分分析（PCA）提取视觉数据的主振动方向，作为DMD分析的输入。结果表明，DMD有效地分离了振动模态和运动-变形耦合位移，在可解释性上优于适当正交分解（POD）。这些发现为AMM建模中的模态振型选择提供了有价值的见解，并为参数分析和控制器设计提供了基础。

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引用次数: 0

Bouc-Wen modelling of asymmetric Stockbridge damper for the wind-induced vibration control of suspension bridge hangers 非对称斯托克桥阻尼器在悬索桥吊架风振控制中的Bouc-Wen建模

IF 4.9 2区工程技术 Q1 ACOUSTICS

Journal of Sound and Vibration

Pub Date : 2026-03-31 Epub Date: 2025-12-19 DOI: 10.1016/j.jsv.2025.119617

G. Bacci , Ø.W. Petersen , V. Denoël , O. Øiseth

Stockbridge dampers are traditionally employed in overhead transmission lines, but their application has recently expanded to suspension bridge hangers. In this context, their increased size, asymmetric configuration, vertical installation, and absence of dedicated design standards present new challenges in understanding their dynamic behaviour. Proper characterisation is essential to correctly dimension the device and determine its optimal placement on the structure. This study addresses these challenges by presenting a four-degree-of-freedom nonlinear model of an asymmetric Stockbridge damper using the Bouc-Wen hysteretic formulation to capture the messenger cables’ amplitude-dependent stiffness and energy dissipation. The model is calibrated and validated against experimental tests conducted on dampers equal to the ones installed on the hangers of the Hålogaland long-span suspension bridge. Unlike impedance-based black-box models, the proposed framework provides a physically consistent representation that can be directly embedded into system-level simulations of hanger-damper dynamics. The present framework can accurately reconstruct both the overall transmitted force and the internal dynamics, in close agreement with the measured responses across varying amplitudes and frequencies. In comparison to existing formulations developed for overhead line dampers, it requires no additional parameters but more effectively captures the amplitude-dependent variation of the damper’s dynamic behaviour, providing improved accuracy in representing its nonlinear characteristics.

斯托克桥阻尼器传统上用于架空输电线路，但近年来其应用已扩展到悬索桥吊架。在这种情况下，它们的尺寸增加、不对称配置、垂直安装以及缺乏专门的设计标准，给理解它们的动态行为带来了新的挑战。适当的表征是必不可少的正确尺寸的装置，并确定其在结构上的最佳位置。本研究提出了一个非对称斯托克布里奇阻尼器的四自由度非线性模型，使用Bouc-Wen滞回公式来捕捉信号电缆的幅值相关刚度和能量耗散，从而解决了这些挑战。对该模型进行了标定，并与大跨度悬索桥吊架上安装的阻尼器进行了试验验证。与基于阻抗的黑盒模型不同，所提出的框架提供了物理上一致的表示，可以直接嵌入到悬架-阻尼器动力学的系统级模拟中。该框架可以准确地重建整体传递力和内部动力学，与不同振幅和频率的测量响应密切一致。与现有的架空线路阻尼器开发的公式相比，它不需要额外的参数，但更有效地捕捉阻尼器动态行为的幅值相关变化，提高了表示其非线性特性的准确性。

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引用次数: 0

On the linear aeroacoustic response of a thermally-choked-flow nozzle to acoustic and entropy plane waves 热阻流喷管对声平面波和熵平面波的线性气动声响应

IF 4.9 2区工程技术 Q1 ACOUSTICS

Journal of Sound and Vibration

Pub Date : 2026-03-31 Epub Date: 2025-12-21 DOI: 10.1016/j.jsv.2025.119619

Frédéric Olivon , Aurelien Genot , Jean-Étienne Durand , Avraham Hirschberg , Estelle Piot

Unlike conventional geometric-throat configurations, thermal-throat choking is induced by volumetric heat addition from a flame, making this approach well suited to dual-mode ramjet applications. Such configurations, however, are potentially sensitive to combustion instabilities that can develop in the combustor, leading to the generation of acoustic and entropy waves which interact with the thermal throat, the outlet acoustic boundary condition. To study this interaction, the linear response of the thermal throat to acoustic or entropy plane-wave forcing is analyzed for five distinct configurations, highlighting several key findings. (i) The characterization of both acoustic-reflection and entropy-noise-production coefficients, along with the critical-throat boundary condition, reveals distinct acoustic behaviors influenced by the heat-release profile, heat-addition and geometric effects. (ii) A comparison between thermal and geometrical nozzles shows that thermally-choked configurations exhibit significantly lower acoustic-reflection coefficients at low frequencies. This acoustic damping is shown to result from the conversion of acoustic waves into entropy waves in the divergent duct, caused by the static temperature gradient. The entropy-noise-production coefficient of thermally-choked nozzle remains close to that of the isentropic configuration. (iii) A quasi-steady-state analytical model is also developed to predict the aeroacoustic reflection coefficients at very low frequencies for a thermal throat at the end of a straight tube. (iv) Additionally, the commonly used assumption of zero Mach-number fluctuations for geometric throat (

M_{*}^{'} = 0

) is critically evaluated and shown to be valid only for isentropic flow in a geometric throat configuration. With a thermal throat, the Mach-number fluctuations at the throat position are shown to be mainly driven by the heat-release profile. (v) At high frequencies, all choking configurations asymptotically converge to an isentropic simple-wave acoustic-radiation behavior.

与传统的几何喉道结构不同，热喉道堵塞是由火焰的体积热量增加引起的，这使得这种方法非常适合双模冲压发动机的应用。然而，这种结构对燃烧室中可能发生的燃烧不稳定性非常敏感，从而导致与热喉（出口声学边界条件）相互作用的声波和熵波的产生。为了研究这种相互作用，分析了五种不同构型的热喉对声学或熵平面波强迫的线性响应，重点介绍了几个关键发现。(i)声反射系数和熵噪声产生系数的特征，以及临界喉道边界条件，揭示了受热释放剖面、热附加和几何效应影响的独特声学行为。热喷嘴和几何喷嘴之间的比较表明，热堵塞结构在低频时的声反射系数明显较低。这种声阻尼是由静态温度梯度引起的声波在发散管道中转化为熵波的结果。热堵塞喷嘴的熵噪声产生系数与等熵构型的熵噪声产生系数保持接近。（三）还建立了准稳态分析模型来预测直管末端热喉极低频时的气动声反射系数。（四）此外，对几何喉道（M* ' =0）通常使用的马赫数零波动假设进行了严格评估，并证明仅对几何喉道构型中的等熵流动有效。对于热喉，喉部位置的马赫数波动主要是由放热剖面驱动的。(v)在高频率下，所有噎阻构型渐近收敛于等熵单波声辐射行为。

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引用次数: 0

A magnetically enhanced piecewise-linear nonlinear energy sink: Transient responses 磁增强分段线性非线性能量汇：瞬态响应

IF 4.9 2区工程技术 Q1 ACOUSTICS

Journal of Sound and Vibration

Pub Date : 2026-03-31 Epub Date: 2025-12-22 DOI: 10.1016/j.jsv.2025.119622

Haining Li , Kefu Liu , Jian Deng

This study proposes a magnetically enhanced piecewise-linear nonlinear energy sink (MPLNES) for simultaneous vibration suppression (VS) and energy harvesting (EH). The MPLNES integrates a small mass, a piecewise-linear spring (PLS), a grounded magnetic spring (GMS), and a grounded electromagnetic energy harvester (EMEH). Two-variable models are developed to characterize the restoring force of the GMS and the transduction factor of the EMEH. Comparative analyses of the MPLNES and a conventional piecewise-linear NES (PLNES) are conducted using time responses, wavelet spectra, and frequency-energy plots. Results show that the MPLNES outperforms the PLNES, particularly at low initial energy levels, due to the GMS-induced dynamic shift of the NES equilibrium position, which promotes earlier nonlinear engagement and lowers the TET threshold. A two-objective optimization further identifies optimal initial energies and load resistances for three NES configurations, demonstrating that the MPLNES provides robust VS and EH performance across varying energy levels, with the PLS playing a key role in sustaining TET. Experimental validations agree well with simulations, confirming the effectiveness of the MPLNES for dual-function applications.

本研究提出一种磁增强分段线性非线性能量汇（MPLNES），用于同时进行振动抑制（VS）和能量收集（EH）。MPLNES集成了一个小质量、一个分段线性弹簧（PLS）、一个接地磁弹簧（GMS）和一个接地电磁能量采集器（EMEH）。建立了表征GMS恢复力和EMEH转导因子的双变量模型。利用时间响应、小波谱和频率能量图对MPLNES和传统的分段线性NES （PLNES）进行了比较分析。结果表明，MPLNES优于PLNES，特别是在较低的初始能级，这是由于gms引起的NES平衡位置的动态移动，这促进了早期的非线性接合并降低了TET阈值。双目标优化进一步确定了三种NES配置的最佳初始能量和负载阻力，表明MPLNES在不同能级上提供了稳健的VS和EH性能，其中PLS在维持TET方面发挥了关键作用。实验验证与仿真结果吻合较好，验证了MPLNES在双功能应用中的有效性。

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引用次数: 0