指数型刚度非线性隔震系统的隔震性能分析

目前应用的隔震系统往往处于非线性工作状态,隔震设计仍基本停留在线性隔震理论的基础上,使隔震系统的设计存在诸多缺陷,因此加强对非线性隔震理论的研究十分重要。用指数型刚度表示的隔震系统在非线性隔震系统中有较强的代表性,只要改变指数参数的正负号就可以简单地反映出隔震材料或隔震元件的硬特性或软特性。通过对隔震系统建立的数学模型在核爆近区和远区的地冲击加速度作用下的隔震性能进行数值计算分析,证明隔震系统刚度特性对隔震性能有很大影响,该分析方法对隔震材料的选择和系统的设计有重要的参考价值。

Analysis of the Isolation Properties of Exponential-rigidity Nonlinear Isolation System

Conventional weapons or earthquake will easily cause serious damages to personnel and facilities in protective structures without shock insulation. Thus,studies on isolation systems would be of considerable importance. However, at the present time, most isolation systems are designed based on linear isolation theory, which are actually working under nonlinear condition. To meet these demands, a most typical nonlinear rigidity system, i.e., exponential-rigidity isolation system has been put forward which can represent the soft or hard characteristics of materials or components for shock insulation by changing the sign of single parameter. Through the analysis of isolation properties on the basis of the mathematical model with the effect of accelerating shocks in the nearby and far range under nuclear explosion, it proves that the rigidity characteristic of the system has a great effect on isolation properties.