柔性约束颗粒阻尼耗能特性研究  

Study on Energy Dissipation Characteristics of Granular Damping with Flexible Boundary

作　　者：李伟[1] 胡选利[1] 黄协清[1] 陈天宁[1] 

机构地区：[1]西安交通大学

出　　处：《西安交通大学学报》1997年第7期23-28,共6页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金

摘　　要：提出了用于分析柔性约束颗粒阻尼（豆包阻尼）的柔性约束新算法．利用离散单元法研究了豆包阻尼的运动及耗能特性，结果表明，豆包阻尼是一种随振动幅值和振动频率呈非线性变化的阻尼结构．同时，系统地研究了豆包结构参数变化对其耗能的影响规律，为豆包阻尼的工程应用提供了指导．A new algorithm, named flexible boundary algorithm, is presented for analysis of granular damping with flexible boundary ( so called “bean bag damping”). Using this algorithm the dynamics and energy dissipation characteristics of bean bag damping can be well modelled by discrete element method(DEM). The numerical simulations show that bean bag is such a damping structure of which the damping varies non linearly with vibration amplitude and frequency. The effects of many other parameters of bean bag structure on energy dissipation and its distribution are also systematically studied. All results can serve as a useful reference for application of bean bag damping in engineering.

关 键 词：柔性约束 颗粒阻尼 耗能特性 减振 冲击阻尼 

分 类 号：TB535.1[理学—物理] O328[理学—声学]