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学者姓名：陈小超
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Abstract ：
In the present work, a novel entangled metallic wire material (EMWM) with good mechanical properties and electrical conductivity was developed by using beryllium bronze alloy wire as raw material. A series of thermalmechanical-electrical coupling tests were carried out to investigate the mechanical properties (average stiffness, loss factor) and electrical conductivity of beryllium bronze alloy entangled metallic wire material (QBe2-EMWM) and austenitic stainless steel entangled metallic wire material (304-EMWM). The effect of the density and ambient temperature on mechanical performances and resistance properties of EMWM were analyzed in detail. It is found that the mechanical properties of QBe2-EMWM are similar to those of austenitic stainless steel entangled metallic wire material (304-EMWM). The electrical resistance of EMWM decreases with the increase of density. Moreover, the electrical resistance of QBe2-EMWM is significantly lower than 304-EMWM and is only 5 % of 304-EMWM. In the aspect of theoretical modeling, based on a cube unit-cell approach, a simplified electrical resistor network was derived from modeling low-frequency current flow through the EMWM. Considering the influence of ambient temperature, the simplified resistor network model was modified by referring to the temperature term of the Johnson -Cook model, and then the conductivity model considering temperature effect for EMWM was established. The accuracy of the theoretical electrical model of EMWM was verified by comparing the calculated results with the experimental data. The results show that the proposed model can adequately predict the electrical conductivity characteristics of EMWM under different temperatures.
Keyword ：
Beryllium bronze alloy Beryllium bronze alloy Electrical conductivity Electrical conductivity Entangled metallic wire material Entangled metallic wire material High temperature High temperature Mechanical behavior Mechanical behavior Thermal-mechanical-electrical coupling test Thermal-mechanical-electrical coupling test
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| GB/T 7714 | Wu, Yiwan , Rao, Zhiqiang , Chen, Xiaochao et al. Mechanics behaviors and electrical conductivity of beryllium bronze alloy entangled metallic wire material: Experimental study and theoretical modeling [J]. | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T , 2024 , 29 : 728-737 . |
| MLA | Wu, Yiwan et al. "Mechanics behaviors and electrical conductivity of beryllium bronze alloy entangled metallic wire material: Experimental study and theoretical modeling" . | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 29 (2024) : 728-737 . |
| APA | Wu, Yiwan , Rao, Zhiqiang , Chen, Xiaochao , Wang, Ran , Bai, Hongbai . Mechanics behaviors and electrical conductivity of beryllium bronze alloy entangled metallic wire material: Experimental study and theoretical modeling . | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T , 2024 , 29 , 728-737 . |
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The ship base is a structure that connects the equipment to the hull and may play a role in restraining and isolating the dynamic load. Adding damping on the base to improve the vibration isolation performance is an important measure to control ship vibration. In this research, the energy transfer route and vector cloud of the ship base were analyzed employing the power flow theory, and then the placement of the particle damper was determined. Through the discrete optimization of different particle parameters including the particle material, diameter and filling rate, the best vibration reduction effect was acquired. The simulation and experiment results show that the particle damping has obvious damping effect, and the steel particle has better damping effect than the lead particle and the aluminum particle. The change of particle filling rate influences the vibration characteristics, and the best effect is achieved when the filling rate is 82%. The vibration reduction performance relies strongly on particle diameters, and they all exert obvious vibration suppression effect at the peak acceleration admittance. The proposed discrete optimization strategy effectively saves experiment cost, and the presented particle damper may be traded as an optional scheme in vibration reduce treatment of ship base. © 2024
Keyword ：
Acceleration admittance Acceleration admittance Discrete optimization Discrete optimization Particle damping Particle damping Power flow Power flow Ship base Ship base
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| GB/T 7714 | Wu, Y. , Dai, Q. , Liu, H. et al. Ship base vibration reduction design technology based on visualization of power flow and discrete optimization [J]. | Ocean Engineering , 2024 , 309 . |
| MLA | Wu, Y. et al. "Ship base vibration reduction design technology based on visualization of power flow and discrete optimization" . | Ocean Engineering 309 (2024) . |
| APA | Wu, Y. , Dai, Q. , Liu, H. , Tang, Y. , Chen, X. . Ship base vibration reduction design technology based on visualization of power flow and discrete optimization . | Ocean Engineering , 2024 , 309 . |
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This work aims to identify ways for the equivalent material parameters of metal-rubber (MR), as well as the establishment of theoretical and numerical methods for sandwich cylindrical shells with metal-rubber core (SCSMR) under thermal conditions. To achieve this goal, the first-order shear deformation theory and Hamiltonian principle are used to derive equations and expressions that consider temperature variations and elastic boundary constraints. This leads to the development of a novel dynamic model for sandwich cylindrical shell structures in a thermal environment. Furthermore, the study analyzes how vibration frequencies are affected by boundary spring stiffness and axial truncation number of displacement-permitted functions using the Jacobi-Ritz method. The impact of aspect ratio, core layer thickness ratio, and temperature on the vibration frequencies of SCS-MR is discussed. The results indicate that temperature slightly affects the frequency of SCS-MR. As the aspect ratio increases, the vibration frequency tends to decrease, irrespective of the circumferential wave number. However, the circumferential wave number plays a considerable role on vibration frequency associated with the core layer thickness ratio.
Keyword ：
Dynamic modeling Dynamic modeling Jacobi-Ritz Jacobi-Ritz Metal-rubber Metal-rubber Sandwich cylindrical shell Sandwich cylindrical shell
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| GB/T 7714 | Wu, Fang , Wei, Yuhan , Wu, Ruixian et al. Dynamic modeling and vibration characteristics of sandwich cylindrical shell with metal-rubber core [J]. | STRUCTURES , 2024 , 63 . |
| MLA | Wu, Fang et al. "Dynamic modeling and vibration characteristics of sandwich cylindrical shell with metal-rubber core" . | STRUCTURES 63 (2024) . |
| APA | Wu, Fang , Wei, Yuhan , Wu, Ruixian , Chen, Xiaochao , Shao, Yichuan , Xue, Xin . Dynamic modeling and vibration characteristics of sandwich cylindrical shell with metal-rubber core . | STRUCTURES , 2024 , 63 . |
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Common studies on entangled metallic wire material (EMWM) lack exploration of the material's electrical conductivity. This paper focuses on the dynamic mechanical properties, electrical conductivity and fatigue properties of Beryllium bronze alloy wrapped wire material (QBe2-EMWM) with excellent electrical conductivity. Three batches of 304-EMWM and QBe2-EMWM with different densities are tested under cyclic dynamic loading, and average dynamic stiffness, loss factor, and resistance are calculated. The experimental results show that the dynamic mechanical properties and electrical conductivity of EMWM are significantly affected by the density of EMWM. The loss factor of EMWM increases with the increase of excitation frequency and excitation amplitude, while the average dynamic stiffness is the opposite. The resistance of QBe2-EMWM is only 5% of that of 304-EMWM. Furthermore, an EMWM fatigue life assessment method based on damage factors is proposed. The fatigue life of EMWM is determined by considering the damage trend of average dynamic stiffness, loss factor, and resistance. The stiffness and resistance of EMWM increase with the increase of excitation times, while the loss factor is the opposite. When the number of excitations reaches a certain value, the mechanical and electrical indexes of EMWM is regionally stable. SEM observations show that the failure modes of 304-EMWM are frictional wear and friction debris, while the failure modes of QBe2-EMWM are indentation, friction debris, frictional wear, and fracture. The cumulative damage model is established, and the rationality of the model is verified by experimental data.
Keyword ：
conductivity conductivity dynamic mechanical behavior dynamic mechanical behavior entangled metallic wire material entangled metallic wire material fatigue property fatigue property SEM SEM
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| GB/T 7714 | Wu, Yiwan , Rao, Zhiqiang , Chen, Xiaochao et al. Experimental Investigation on Mechanical, Electrical, and Fatigue Properties of Entangled Metal Wires under Cyclic Dynamic Load Test [J]. | JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE , 2024 . |
| MLA | Wu, Yiwan et al. "Experimental Investigation on Mechanical, Electrical, and Fatigue Properties of Entangled Metal Wires under Cyclic Dynamic Load Test" . | JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE (2024) . |
| APA | Wu, Yiwan , Rao, Zhiqiang , Chen, Xiaochao , Wang, Ran , Bai, Hongbai . Experimental Investigation on Mechanical, Electrical, and Fatigue Properties of Entangled Metal Wires under Cyclic Dynamic Load Test . | JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE , 2024 . |
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As a high-temperature resistant damping material, reducing vibration by coating with M-shape metal rubber (MMR) in a pipeline system is a promising solution due to its energy dissipation induced by micro dry friction between metallic wires. The main challenge for dynamic calculation and performance evaluation of elastic-porous metal rubber (MR) is derived from the intricate spatial network structure. In this work, the dynamic properties including acceleration admittance and insertion loss of the MMR-coated pipeline system were conducted by numerical simulation and experimental analysis. The constitutive models used to characterize hysteresis phenomena, including Yeoh and Bergström-Boyce models, were identified with different density parameters and adopted for steady-state dynamic numerical analysis. The sine sweep frequency test was conducted to verify the accuracy of the developed numerical model. The results indicate that the maximum error of stress-strain curve between numerical prediction and experimental measurement is 10.7%. In the frequency range of 0-1 500 Hz, the insertion loss of the MMR-coated pipeline system is positively correlated with the density of MMR, as opposed to the coating distance of pipeline clamps and the influence of excitation force is minimal. Furthermore, the error of dynamic response of the pipeline system in low frequency between the experiment and simulation is 4.7%, indicating that the accuracy of the hysteresis model in predicting the dynamic characteristic of MR materials is effective. © 2025 World Scientific Publishing Company.
Keyword ：
dynamic characteristics dynamic characteristics elastic-porous metal rubber elastic-porous metal rubber Hysteresis model Hysteresis model pipeline system pipeline system
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| GB/T 7714 | Chen, Y. , Ge, S. , Liu, J. et al. Dynamic Characteristics of M-Shape Metal Rubber-Coated Pipeline System: Numerical Modeling and Experimental Analysis [J]. | International Journal of Structural Stability and Dynamics , 2024 . |
| MLA | Chen, Y. et al. "Dynamic Characteristics of M-Shape Metal Rubber-Coated Pipeline System: Numerical Modeling and Experimental Analysis" . | International Journal of Structural Stability and Dynamics (2024) . |
| APA | Chen, Y. , Ge, S. , Liu, J. , Chen, X. , Xue, X. . Dynamic Characteristics of M-Shape Metal Rubber-Coated Pipeline System: Numerical Modeling and Experimental Analysis . | International Journal of Structural Stability and Dynamics , 2024 . |
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This paper investigates the free vibration, buckling and dynamic stability of spinning bi-directional functional gradient materials (BDFGMs) conical shells. The material properties vary along the thickness and axial direction. The dynamics model is established based on the first-order shear deformation theory and the governing equations and boundary conditions of the conical shell are derived employing Hamilton's principle. Subsequently, the differential quadrature (DQ) method is employed to discretize the governing equations into an algebraic system of equations for solving and analyzing the free vibration characteristics of the conical shell. The theoretical model's accuracy and the solution method's reliability are rigorously verified. The effects of temperature, functional gradient index, and rotation on the vibration characteristics, traveling wave vibration and critical speed of the conical shell in a thermal environment are systematically explored through numerical analysis. The results indicate that both the material gradient index and temperature increase lead to a decrease in the shell's natural frequency. For the spinning BDFGMs shell, elevated temperature causes the occurrence of trailing wave vibration to advance to the critical speed. Centrifugal force emerges as the primary factor influencing the critical buckling load and unstable region variation of the spinning shell.
Keyword ：
Bi-directional functionally gradient material Bi-directional functionally gradient material free vibration free vibration spinning, conical shell spinning, conical shell stability stability
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| GB/T 7714 | Chen, Xiaochao , Gao, Qing , Huang, Songbing et al. Vibration, Buckling and Stability Analyses of Spinning Bi-Directional Functionally Graded Conical Shells [J]. | INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS , 2024 , 25 (01) . |
| MLA | Chen, Xiaochao et al. "Vibration, Buckling and Stability Analyses of Spinning Bi-Directional Functionally Graded Conical Shells" . | INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS 25 . 01 (2024) . |
| APA | Chen, Xiaochao , Gao, Qing , Huang, Songbing , Chen, Kangni , Wu, Yiwan . Vibration, Buckling and Stability Analyses of Spinning Bi-Directional Functionally Graded Conical Shells . | INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS , 2024 , 25 (01) . |
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为满足海洋船舶工程装备多向循环载荷和多重环境减振降噪需求,结合球铰转动灵活、结构紧凑等特点,设计了一种六自由度大变形隔振装置,建立了动力学理论模型和动态试验测试系统,通过有限元软件对隔振装置进行谐响应分析,研究弹簧刚度对隔振装置动刚度和固有频率的影响。搭建试验平台,开展正弦扫频试验测试隔振装置的隔振性能,通过对仿真曲线与试验曲线进行对比分析误差出现的原因。另外,为使隔振装置的隔振性能反映清晰直观,计算了隔振装置的阻抗和力传递率。研究结果表明:弹簧刚度越小,隔振装置开始发挥隔振效果的起始频率越低,但考虑到隔振装置需具有一定的承载能力;扫频试验曲线中高频阶段的响应会逐渐增加是由于试验基座和配重块的影响,并非隔振装置的固有属性;隔振装置具有较好的隔振效果,其力传递率随激振频率的增加可达到0.04。
Keyword ：
六自由度 六自由度 谐响应 谐响应 隔振 隔振 隔振性能 隔振性能
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| GB/T 7714 | 郑超 , 陈小超 , 薛新 . 一种六自由度大变形隔振装置隔振性能研究 [C] //第十五届全国振动理论及应用学术会议（NVTA2023） . 2023 . |
| MLA | 郑超 et al. "一种六自由度大变形隔振装置隔振性能研究" 第十五届全国振动理论及应用学术会议（NVTA2023） . (2023) . |
| APA | 郑超 , 陈小超 , 薛新 . 一种六自由度大变形隔振装置隔振性能研究 第十五届全国振动理论及应用学术会议（NVTA2023） . (2023) . |
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This research addresses the free vibration performance of bi-directional functionally graded materials (BDFGMs) rectangular plate with general boundary restraints and geometrical imperfections. The sym-metric/asymmetric material distributions subject to power-law along in-plane two directions are consid-ered. Two types of geometric imperfections are formulated employing transcendental functions, including the sine-type imperfection which is global eccentric/symmetrical and depicted by sine and exponential functions, and the cosine-type global/localized imperfections which is simulated by hyperbolic and cosine functions. The general boundary restraints are imitated by artificial virtual springs. The Lagrangian energy function is formulated, and then vibration characteristics of plates are acquired with the Ritz method and improved Fourier series. Verifications are carried out for accuracy of theoretical model and reliability of solution method. A comprehensive numerical investigation are exhibited to explore the influencing mech-anism of material distribution patterns, geometrical imperfection modal and elastic boundary restraints on vibration performance of rectangular plates. The results show that the in-plane material gradient can function as regulatory measures for dynamic characteristic of plates. In addition, geometric imperfec-tions may cause singularity in vibration performance of plate. These innovative results may serve as a benchmark for future studies on design or analysis of plates.(c) 2022 Elsevier Masson SAS. All rights reserved.
Keyword ：
Bi-directional functionally graded materials Bi-directional functionally graded materials Elastic restraints Elastic restraints Free vibration Free vibration Global and localized imperfections Global and localized imperfections
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| GB/T 7714 | Chen, Xiaochao , Lu, Yixin , Wu, Zhangbin et al. Free vibration of in-plane bi-directional functionally graded materials rectangular plates with geometric imperfections and general elastic restraints [J]. | AEROSPACE SCIENCE AND TECHNOLOGY , 2023 , 132 . |
| MLA | Chen, Xiaochao et al. "Free vibration of in-plane bi-directional functionally graded materials rectangular plates with geometric imperfections and general elastic restraints" . | AEROSPACE SCIENCE AND TECHNOLOGY 132 (2023) . |
| APA | Chen, Xiaochao , Lu, Yixin , Wu, Zhangbin , Shao, Yichuan , Xue, Xin , Wu, Yiwan . Free vibration of in-plane bi-directional functionally graded materials rectangular plates with geometric imperfections and general elastic restraints . | AEROSPACE SCIENCE AND TECHNOLOGY , 2023 , 132 . |
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This research is designed to investigate the vibrational characteristics of a sandwich cylindrical shell structure with an elastic-porous metal-rubber core in the thermal environment by the power flow method. The finite element models of the homogeneous and sandwich cylindrical shell structures are established for harmonic response analysis completed by the mode superposition method. Further, the structural power flow is calculated and visualized based on the results of the finite element analysis. A comparison is made with the results for a plate available in the literature validating the effectiveness of the power flow visualization method. The effects of some key factors, such as the frequency, the metal-rubber core, the length-to-radius ratio, and the temperature on the power flow of the sandwich cylindrical shell structure, are analyzed using power flow cloud pictures and vector diagrams. The results reveal that the frequency affects the distribution of power flow, and the metal-rubber core can dissipate energy, whereas the length-to-radius ratio and temperature do not have a significant influence on the power flow of the sandwich cylindrical shell structure with a metal-rubber core (SCS-MR). This work should be valuable for the noise and vibration control application of the SCS-MR.
Keyword ：
finite element method finite element method metal rubber core metal rubber core power flow power flow Sandwich cylindrical shell Sandwich cylindrical shell vibrational characteristics vibrational characteristics
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| GB/T 7714 | Xue, Xin , Wu, Ruixian , Wu, Fang et al. Vibrational Power Flow Analysis for the Sandwich Cylindrical Shell Structure with a Metal-Rubber Core in the Thermal Environment [J]. | INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS , 2023 , 23 (20) . |
| MLA | Xue, Xin et al. "Vibrational Power Flow Analysis for the Sandwich Cylindrical Shell Structure with a Metal-Rubber Core in the Thermal Environment" . | INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS 23 . 20 (2023) . |
| APA | Xue, Xin , Wu, Ruixian , Wu, Fang , Xiong, Yunlingzi , Shen, Guojian , Chen, Xiaochao . Vibrational Power Flow Analysis for the Sandwich Cylindrical Shell Structure with a Metal-Rubber Core in the Thermal Environment . | INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS , 2023 , 23 (20) . |
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基于曲线分解的思想,将动态恢复力-位移曲线分解为非线性弹性力-位移曲线和椭圆曲线,建立描述金属橡胶迟滞力学性能的非线性弹簧-粘性阻尼单元模型,利用阻尼耗能相等的原理进行参数识别.对圆环形金属橡胶进行动态实验测试,以验证理论模型的正确性.结果表明,理论曲线与实验曲线的变化趋势较为一致,理论模型可以较好地描述金属橡胶的迟滞力学特性.此外,将金属橡胶分解为非线性弹簧单元和粘性阻尼单元,仿真金属橡胶的迟滞力学特性.仿真结果表明,该方法具有较好的仿真精度.
Keyword ：
力学模型 力学模型 参数识别 参数识别 有限元仿真 有限元仿真 金属橡胶 金属橡胶
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| GB/T 7714 | 吴瑞先 , 阮仕鑫 , 吴芳 et al. 金属橡胶粘弹性阻尼迟滞力学与数值模型 [J]. | 福州大学学报（自然科学版） , 2023 , 51 (1) : 83-88 . |
| MLA | 吴瑞先 et al. "金属橡胶粘弹性阻尼迟滞力学与数值模型" . | 福州大学学报（自然科学版） 51 . 1 (2023) : 83-88 . |
| APA | 吴瑞先 , 阮仕鑫 , 吴芳 , 薛新 , 陈小超 . 金属橡胶粘弹性阻尼迟滞力学与数值模型 . | 福州大学学报（自然科学版） , 2023 , 51 (1) , 83-88 . |
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