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学者姓名：曹东兴
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Abstract ：
Tuned particle dampers (TPDs) are recognized for their innovative approach to nonlinear energy dissipation, maintaining the dynamic characteristics of the systems they protect. However, the inherent complexity of particle system nonlinearities poses substantial challenges in developing accurate dynamical models. Traditional analysis methods are inadequate in addressing the dynamic characteristics of such complex coupled systems. This study introduces a novel integration of multibody dynamics with discrete element methods through a bidirectional coupling approach to a comprehensive model of the TPD system. Then, extensive investigations into the system's responses and its vibration control efficacy under diverse external forces and frequencies are conducted, and the energy dissipation attributes and dynamic adjustments are also delved into system mass. Given the extensive simulation times and substantial resource demands of such systems, a neural network-based predictive model has been devised to forecast the vibration absorption capabilities of TPDs, offering essential insights that enhance engineering applications.
Keyword ：
Nonlinear energy dissipation Nonlinear energy dissipation Tuned particle damper Tuned particle damper Co-simulation Co-simulation Neural networks Neural networks
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| GB/T 7714 | Guo, Xiangying , Zhu, Yunan , Cao, Dongxing . Dynamic design and performance prediction of tuned particle dampers based on co-simulation [J]. | NONLINEAR DYNAMICS , 2024 . |
| MLA | Guo, Xiangying 等. "Dynamic design and performance prediction of tuned particle dampers based on co-simulation" . | NONLINEAR DYNAMICS (2024) . |
| APA | Guo, Xiangying , Zhu, Yunan , Cao, Dongxing . Dynamic design and performance prediction of tuned particle dampers based on co-simulation . | NONLINEAR DYNAMICS , 2024 . |
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Abstract ：
Sandwich plate structures are extensively utilized in engineering due to their favorable stiffness-to-weight ratio. Nonetheless, these lightweight thin-walled structures frequently encounter challenges related to inadequate lowfrequency vibration performance, which significantly restricts their applications, particularly in the realm of precision instruments which is sensitive to vibration. This study introduces an innovative design of an active nonlinear metamaterial, to achieve tunable broadband low-frequency bandgaps for sandwich plates. The nonlinear oscillator incorporates an inertia amplification mechanism (IAM), Euler-buckled beams, mass elements, and magneto-rheological elastomers (MREs), which are modulated via external magnetic fields to adjust the material's stiffness dynamically. Employing Hamilton's principles and the plate wave expansion method (PWE), the dispersion relations for the metamaterial plate are derived, elucidating the dispersion surfaces and the band structures within its sandwich-like plates. The dynamical equations of the metamaterial plate are formulated and validated through numerical simulations using the Galerkin method, confirming the theoretical predictions. The results demonstrate effective control over low-frequency and broadband bandgaps under low mass ratio conditions through strategic manipulation of the inertia amplification factor and magnetic flux. The study extensively explores the nonlinear dynamic responses of the metamaterial, highlighting the significant impact of excitation amplitudes on the amplitudedependent bandgaps.
Keyword ：
Inertia amplification mechanism Inertia amplification mechanism Nonlinear metamaterials Nonlinear metamaterials Low-frequency bandgap control Low-frequency bandgap control Magneto-rheological elastomers (MRE) Magneto-rheological elastomers (MRE)
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| GB/T 7714 | Yang, Dongshuo , Guo, Xiangying , Zhang, Weixing et al. Non-linear dynamics and bandgap control in magneto-rheological elastomers metamaterials with inertial amplification [J]. | THIN-WALLED STRUCTURES , 2024 , 204 . |
| MLA | Yang, Dongshuo et al. "Non-linear dynamics and bandgap control in magneto-rheological elastomers metamaterials with inertial amplification" . | THIN-WALLED STRUCTURES 204 (2024) . |
| APA | Yang, Dongshuo , Guo, Xiangying , Zhang, Weixing , Cao, Dongxing . Non-linear dynamics and bandgap control in magneto-rheological elastomers metamaterials with inertial amplification . | THIN-WALLED STRUCTURES , 2024 , 204 . |
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Abstract ：
Z-shaped folding wings have the potential to enhance the flight performance of an aircraft, contingent upon its mission requirements. However, the current scope of research on unmanned aerial vehicles (UAVs) with Z-shaped folding wings primarily focuses on the analysis of their folding structure and aeroelasticity-related vibrations. Computational fluid dynamics methods and dynamic meshing are employed to examine the folding process of Z-shaped folding wings. By comparing the steady aerodynamic characteristics of Z-shaped folding wings with those of conventional wings, this investigation explores the dynamic aerodynamic properties of Z-shaped folding wings at varying upward folding speeds. The numerical findings reveal that the folding of Z-shaped folding wings reduces the lift-to-drag ratio, yet simultaneously diminishes the nose-down pitching moment, thereby augmenting maneuverability. Concerning unsteady aerodynamics, the transient lift and drag coefficients of the folded wing initially increase and subsequently decrease as the folding angle increases at small angles of attack. Likewise, the nose-down pitching moment exhibits the same pattern in response to the folding angle. Additionally, the aerodynamic coefficients experience a slight decrease during the initial half of the folding process with increasing folding speed. Once the wing reaches approximately 40 degrees similar to 45 degrees of folding, there is an abrupt change in the transient aerodynamic coefficients. Notably, this abrupt change is delayed with higher folding speeds, eventually converging to similar values across different folding speeds.
Keyword ：
dynamic meshing dynamic meshing dynamic aerodynamic dynamic aerodynamic folding speed folding speed maneuverability maneuverability Z-shaped folding Z-shaped folding
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| GB/T 7714 | Huang, Yongchang , Guo, Xiangying , Cao, Dongxing . Aerodynamic Characteristics of a Z-Shaped Folding Wing [J]. | AEROSPACE , 2023 , 10 (9) . |
| MLA | Huang, Yongchang et al. "Aerodynamic Characteristics of a Z-Shaped Folding Wing" . | AEROSPACE 10 . 9 (2023) . |
| APA | Huang, Yongchang , Guo, Xiangying , Cao, Dongxing . Aerodynamic Characteristics of a Z-Shaped Folding Wing . | AEROSPACE , 2023 , 10 (9) . |
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Abstract ：
This research proposes a novel type of variable stiffness tuned particle damper (TPD) for reducing vibrations in boring bars. The TPD integrates the developments of particle damping and dynamical vibration absorber, whose frequency tuning principle is established through an equivalent theoretical model. Based on the multiphase flow theory of gas-solid, it is effective to obtain the equivalent damping and stiffness of the particle damping. The dynamic equations of the coupled system, consisting of a boring bar with the TPD, are built by Hamilton's principle. The vibration suppression of the TPD is assessed by calculating the amplitude responses of the boring bar both with and without the TPD by the Newmark-beta algorithm. Moreover, an improvement is proposed to the existing gas-solid flow theory, and a comparative analysis of introducing the stiffness term on the damping effect is presented. The parameters of the TPD are optimized by the genetic algorithm, and the results indicate that the optimized TPD effectively reduces the peak response of the boring bar system.
Keyword ：
vibration control vibration control tuned particle damper (TPD) tuned particle damper (TPD) O32 O32 variable stiffness variable stiffness particle particle
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| GB/T 7714 | Guo, Xiangying , Zhu, Yunan , Luo, Zhong et al. Variable stiffness tuned particle dampers for vibration control of cantilever boring bars [J]. | APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION , 2023 , 44 (12) : 2163-2186 . |
| MLA | Guo, Xiangying et al. "Variable stiffness tuned particle dampers for vibration control of cantilever boring bars" . | APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION 44 . 12 (2023) : 2163-2186 . |
| APA | Guo, Xiangying , Zhu, Yunan , Luo, Zhong , Cao, Dongxing , Yang, Jihou . Variable stiffness tuned particle dampers for vibration control of cantilever boring bars . | APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION , 2023 , 44 (12) , 2163-2186 . |
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Abstract ：
Track irregularities induce potential risks to the safety and stability of railway track systems. This paper proposes a novel methodology to identify vertical and lateral track irregularities. The method involves measuring system-based attitude calculation and a model-based unknown input observer estimator, based on the dynamic responses of distributed multi-sensors on the vehicle and bogie. First, a mechanical model of wheel-rail contacts is built with dynamic methods. The model considers the different directions of motion for a railway vehicle and consists of two bogies and four wheelsets. Based on the multi-sensor acceleration measurement, the vertical and lateral acceleration signals of the vehicle and bogies are integrated into the displacement signal. Then a state-space description of the vehicle suspension model is established for inverse dynamical analysis to extract the input signals. A suitable unknown input observer is constructed to estimate the track irregularities by transforming the state space equations of the vehicle into an augmented system that can monitor the track irregularities in-service. This method provides an opportunity to reduce the costs of the monitoring infrastructure and provide quicker and more reliable information about the status of a track.
Keyword ：
condition monitoring condition monitoring onboard measurements onboard measurements dynamic responses dynamic responses attitude calculation attitude calculation Track irregularity identification Track irregularity identification unknown input observer unknown input observer
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| GB/T 7714 | Guo, Xiangying , Li, Changkun , Luo, Zhong et al. Identification of track irregularities with the multi-sensor acceleration measurements of vehicle dynamic responses [J]. | VEHICLE SYSTEM DYNAMICS , 2023 , 62 (4) : 906-931 . |
| MLA | Guo, Xiangying et al. "Identification of track irregularities with the multi-sensor acceleration measurements of vehicle dynamic responses" . | VEHICLE SYSTEM DYNAMICS 62 . 4 (2023) : 906-931 . |
| APA | Guo, Xiangying , Li, Changkun , Luo, Zhong , Cao, Dongxing . Identification of track irregularities with the multi-sensor acceleration measurements of vehicle dynamic responses . | VEHICLE SYSTEM DYNAMICS , 2023 , 62 (4) , 906-931 . |
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Abstract ：
Sandwich structures possess a high stiffness-to-mass ratio, which facilitates flexural wave propagation at lower frequencies and enhances their vibration isolation and sound insulation capabilities, therefore, sandwich-like metamaterial plates with the nonlinear local oscillator is constructed in this paper to obtain adjustable bandgap in low-frequency. The buckling beam oscillator consists of a small mass, linear support spring, and buckling elastic elements for nonlinear stiffness. First, governing equations of flexural vibrations of plates are deduced based on the Hamilton principle. By utilizing the harmonic balance method (HBM), the dispersion relation of a sandwich-like plate can be determined. Theoretical analysis reveals the presence of structural bandgap ranges at lower frequencies, which are subject to the excitation amplitudes. And in order to validate the theoretical findings, the finite element method (FEM) is employed. Moreover, the influence of structural parameters, including oscillator mass, linear spring stiffness, buckling beam angle, and Young's modulus, are conducted to enhance the vibration control in the low-frequency. Interestingly, it is observed that the effectiveness of low-frequency suppression in the nonlinear metamaterial plate varies significantly across different boundary conditions. Therefore, the sandwich structures with nonlinear local oscillators can provide an effective way to suppress low-frequency vibration and maintain dynamic stability.
Keyword ：
Metamaterial plates Metamaterial plates buckling beam oscillator buckling beam oscillator nonlinear bandgap nonlinear bandgap vibration suppression vibration suppression
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| GB/T 7714 | Guo, Xiangying , Yang, Dongshuo , Zhang, Weixing et al. The Adjustable Bandgap of Novel Local Resonance Sandwich-Like Metamaterial Plates with Buckling Beam Oscillators [J]. | INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS , 2023 , 24 (21) . |
| MLA | Guo, Xiangying et al. "The Adjustable Bandgap of Novel Local Resonance Sandwich-Like Metamaterial Plates with Buckling Beam Oscillators" . | INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS 24 . 21 (2023) . |
| APA | Guo, Xiangying , Yang, Dongshuo , Zhang, Weixing , Cao, Dongxing . The Adjustable Bandgap of Novel Local Resonance Sandwich-Like Metamaterial Plates with Buckling Beam Oscillators . | INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS , 2023 , 24 (21) . |
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Abstract ：
An adaptive dynamic vibration absorber (ADVA) is designed for low-frequency vibration suppression. The leaf springs are applied as the tuning stiffness elements. The principle of variable stiffness is analyzed to obtain the effective range of the first natural frequency variation. A classic simply supported manipulator is selected as the controlled system. The coupled dynamic model of the manipulator-ADVA system is built to obtain the maximum damping efficiency and the vibration absorption capacity of the designed ADVA. An experimental platform is set up to verify the theoretical results. It is revealed that the ADVA can adjust the first natural frequency on a large scale by changing the curvature of the leaf springs. The amplitude of the manipulator is reduced obviously with the installation of the designed ADVA. Finally, based on the short-time Fourier transformation (STFT), a stepwise optimization algorithm is proposed to achieve a quick tuning of the natural frequency of the ADVA so that it can always coincide with the frequency of the prime structure. Through the above steps, the intelligent frequency tuning of the ADVA is realized with high vibration absorption performance in a wide frequency range.
Keyword ：
leaf spring leaf spring vibration control vibration control stiffness tuning stiffness tuning O342 O342 adaptive dynamic vibration absorber (ADVA) adaptive dynamic vibration absorber (ADVA)
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| GB/T 7714 | Guo, Xiangying , Zhu, Yunan , Qu, Yegao et al. Design and experiment of an adaptive dynamic vibration absorber with smart leaf springs [J]. | APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION , 2022 , 43 (10) : 1485-1502 . |
| MLA | Guo, Xiangying et al. "Design and experiment of an adaptive dynamic vibration absorber with smart leaf springs" . | APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION 43 . 10 (2022) : 1485-1502 . |
| APA | Guo, Xiangying , Zhu, Yunan , Qu, Yegao , Cao, Dongxing . Design and experiment of an adaptive dynamic vibration absorber with smart leaf springs . | APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION , 2022 , 43 (10) , 1485-1502 . |
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Abstract ：
In this work, the graphene composite sheets coated with metal were equivalent to composite laminated sheets. The nonlinear coupling vibrations of graphene composite laminated sheets (GCLSs) under particle impact were investigated. The size-dependent effect and viscoelasticity were incorporated to model GCLSs in the nonlocal continuum theory and Kelvin-Voigt model framework. Particle impact was regarded as stochastic excitation on the GCLS. According to the von Karman strain-displacement relationship for the geometric nonlinearity and Reddy's third-order shear deformation plate theory, the nonlinear governing partial differential equations were derived. To examine the validity of this model, a comparison with published results was carried out. With the purpose of ensuring the convergence and reliability of the results, a large number of mode truncations were performed. The emphasis of numerical simulations was placed on studying how the various factors, including the size-dependent effect, forcing amplitude, and viscoelasticity, influencing the nonlinear responses of GCLS. The motivation of this study is to present a novel model providing both practical and theoretical guidance for devices involving graphene composites subjected to particle impacts.
Keyword ：
Nonlinear coupling vibrations Nonlinear coupling vibrations Viscoelasticity Viscoelasticity Graphene composite laminated sheet Graphene composite laminated sheet Size-dependent effect Size-dependent effect
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| GB/T 7714 | Wu, Qiliang , Yao, Minghui , Li, Mingyuan et al. Nonlinear coupling vibrations of graphene composite laminated sheets impacted by particles [J]. | APPLIED MATHEMATICAL MODELLING , 2021 , 93 : 75-88 . |
| MLA | Wu, Qiliang et al. "Nonlinear coupling vibrations of graphene composite laminated sheets impacted by particles" . | APPLIED MATHEMATICAL MODELLING 93 (2021) : 75-88 . |
| APA | Wu, Qiliang , Yao, Minghui , Li, Mingyuan , Cao, Dongxing , Bai, Bin . Nonlinear coupling vibrations of graphene composite laminated sheets impacted by particles . | APPLIED MATHEMATICAL MODELLING , 2021 , 93 , 75-88 . |
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Abstract ：
本文设计了一种将压电材料内嵌入于硅凝胶软材料中的三维自组装机械结构进行振动能量采集研究,并通过有限元方法计算了该结构的俘能特性。将设计好的2D前驱体在预定位置粘结到预拉伸的软弹性体基板上,释放基体预应力使2D前驱体压缩屈曲为三维结构,其中三维结构形式可通过改变预应力的大小进行调谐,将其嵌入到硅凝胶软材料中维持三维形状。通过在不同方向,不同频率对该结构进行激励,其结果表明:3D几何结构具有宽范围、可调谐、多方向的振动模态,且嵌入于软材料中一方面可以维持3D几何构型以防塌陷,另一方面可以降低系统的固有频率以实现宽低频、多方向的振动能量采集。
Keyword ：
3D自组装结构多模态多方向俘能 3D自组装结构多模态多方向俘能
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| GB/T 7714 | 卢一铭 , 曹东兴 . 基于嵌入式3D自组装结构的压电俘能器特性研究 [C] //北京力学会第二十七届学术年会论文集 . 2021 . |
| MLA | 卢一铭 et al. "基于嵌入式3D自组装结构的压电俘能器特性研究" 北京力学会第二十七届学术年会论文集 . (2021) . |
| APA | 卢一铭 , 曹东兴 . 基于嵌入式3D自组装结构的压电俘能器特性研究 北京力学会第二十七届学术年会论文集 . (2021) . |
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Abstract ：
设计了一种由圆柱形散射体嵌入环氧树脂基体而组成的周期阵列局域共振型声子晶体板结构,分析了其平直带区域以及缺陷态的能量集中特性,并研究了其振动能量采集特性.首先基于超元胞法结合有限元方法分析了5×5完美声子晶体结构和缺陷态声子晶体结构的能带曲线和能量传输特性;考虑点缺陷局域共振声子晶体结构的能量集中特性,利用压电材料代替超元胞中某点的散射体材料引入点缺陷,分析其振动能量采集特性,结果表明单个5×5点缺陷超胞结构共振频带较窄;为提升俘能效率,提出两种由3个具有不同缺陷态数量和构型的5×5超元胞结构并联而成的5×15声子晶体板结构,机电耦合特性分析结果表明:所提出的局域共振型声子晶体板结构克服了单个...
Keyword ：
缺陷态 缺陷态 宽频带 宽频带 振动能量采集 振动能量采集 带隙 带隙 声子晶体 声子晶体
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| GB/T 7714 | 卢一铭 , 曹东兴 , 申永军 et al. 局域共振型声子晶体板缺陷态带隙及其俘能特性研究 [J]. | 力学学报 , 2021 , 53 (04) : 1114-1123 . |
| MLA | 卢一铭 et al. "局域共振型声子晶体板缺陷态带隙及其俘能特性研究" . | 力学学报 53 . 04 (2021) : 1114-1123 . |
| APA | 卢一铭 , 曹东兴 , 申永军 , 陈许敏 . 局域共振型声子晶体板缺陷态带隙及其俘能特性研究 . | 力学学报 , 2021 , 53 (04) , 1114-1123 . |
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