舰船机电设备在冲击环境下的离散模型  

The discrete model of marine equipment under shock excitation

作　　者：贺华[1] 冯奇[1] 

机构地区：[1]同济大学教育部固体力学重点实验室,上海200092

出　　处：《噪声与振动控制》2001年第5期2-6,共5页Noise and Vibration Control

基　　金：国家自然科学基金资助项目No .1 0 0 72 0 4 0

摘　　要：在强冲击作用下 ,舰船设备与抗冲击限位块可能发生碰撞 ,从而导致破坏 ,本文采用在不对称四点带限位器弹性元件支撑的空间单刚体模型 ,模拟简单设备———支撑保护系统 ,并采用经典的碰撞理论直接导出该系统的映射方程 ,建立其冲击后振动的离散动力学模型。经过对某实船设备在冲击作用后的振动响应调查指出 ,由于可能发生碰撞 ,该系统在共振区附近呈现复杂的非线性特性。该结论对如何正确设计设备支撑保护系统提供了理论参考依据。Under strong shock,contact may occur between marine equipment and protection system,which then results in support breakage.Spatial uni-rigid body supported by asymmetry quaternion sustains(elastic cells with stop)is used to simulate protection system.Mapped equation is deduced by applying classical contact law,and an after shock discrete kinemics model is developed.An investigation of vibrational response in a real marine equipment revealed that the system presents nonlinear character around resonance region.The conclusions offer theoretical reference for equipment protection system design.

关 键 词：离散动力学 碰撞振动 多点碰撞 单面约束 抗冲击保护系统 冲击 舰船 机电设备 支撑保护系统 振动控制 

分 类 号：U674.703.3[交通运输工程—船舶及航道工程]