减振浮筏系统多向冲击谱研究  

Study on Multi Directional Shock Spectrum of Raft System

作　　者：刘永明[1] 沈荣瀛[1] 严济宽[1] 

机构地区：[1]上海交通大学振动,冲击与噪声研究所

出　　处：《上海交通大学学报》1997年第9期13-17,共5页Journal of Shanghai Jiaotong University

摘　　要：应用模态分析和概率统计理论，提出了多自由度系统ＳＲＳＳ（ＳｑｕａｒｅＲｏｏｔｏｆＳｕｍｏｆＳｑｕａｒｅｓ）冲击谱的近似计算方法，导出了剩余响应的一个重要关系式，引入了激励因子的概念，简化了多自由度系统冲击谱的求解，并将该方法应用于减振浮筏系统工程实例中．With modal analyses and probability theories, a new method for multiple degrees of freedom system named SRSS (Square Root of Sum of Squares) shock spectrum method is advanced. An important relationships between residual responses is derived and a new concept of excitation factor is introduced, thus the solutions of shock spectrum of multiple degrees of freedom system is infinitely simplified. The new method, SRSS shock spectrum theory, is available in shock isolation investigation and design of isolators, which can also be applied to some industrial areas such as aircraft, ship, naval vessel, vehicle and building structrues etc.

关 键 词：浮筏系统 多向冲击激励 冲击谱 隔振系统 

分 类 号：TB535.1[理学—物理]