帽形金属橡胶压缩力学性能及耗能机理  

Compressive mechanical property and energy consumption mechanism of hat-shaped metal-rubber

作　　者：郑志 任子林 邹路明 廖娟 薛新 ZHENG Zhi;REN Zilin;ZOU Luming;LIAO Juan;XUE Xin(Institute of Metal Rubber&Vibration Noise,School of Mechanical Engineering and Automation,Fuzhou 350116,China)

机构地区：[1]福州大学金属橡胶与振动噪声研究所机械工程及自动化学院,福建福州350116

出　　处：《兵器材料科学与工程》2022年第5期14-19,共6页Ordnance Material Science and Engineering

基　　金：国家自然科学基金(51805087,51705080)。

摘　　要：金属橡胶材料及其典型构件作为极端服役环境下的特种减隔振阻尼元件,在国防装备隐身降噪领域发挥重要作用。针对多自由度隔振平台刚度支撑和阻尼性能需求,设计一款具有三向阻尼性能的帽形金属橡胶结构件,用数值模拟与试验相结合,研究帽形金属橡胶静态压缩下的能耗机理和三向准静态压缩力学特性。结果表明:帽形金属橡胶的细观耗能以线接触金属丝间的滑移摩擦居多。极限压缩下帽形金属橡胶的载荷-变形量曲线呈刚度减小、负刚度及刚度突增等非线性现象。帽形金属橡胶的横向和垂向能量耗散系数与静态压缩变形量呈正相关、等效刚度与静态压缩变形量呈负相关。As a special vibration reduction and damping element applied in extreme environmental conditions,metal-rubber and its typical structures were vital for the stealthy technique of defense-related equipment.In order to satisfy the stiffness support and damping ability for the multi-directional vibration isolation,a three-dimensional hat-shaped metal-rubber was designed as a typical damper.Meanwhile,energy consumption mechanism under static compression and three-way quasi-static compression mechanical characteristics of hat-shaped metal-rubber were studied by means of numerical simulation and physical experiment.The results show that the mesoscopic energy consumption of hat-shaped metal-rubber is mostly due to the slip friction between line contact metal wire.In addition,the load-deformation curves under extreme compression of the studied hat-shaped metalrubber exhibit the nonlinearphenomena such as initially degraded stiffness,the middle negative stiffness and the final uprush stiffness.The transverse and vertical energy dissipation coefficients of hat-shaped metal-rubber are significantly positive correlated with the static compressive deformation.But the equivalent stiffness is significantly negative correlated with the static compressive deformation.

关 键 词：帽形金属橡胶 静态压缩 数值模拟 能量耗散系数 等效刚度 

分 类 号：TB31[一般工业技术—材料科学与工程]