A Study on the Damping Charactors in the Dynamic Structual Responce in Ships

为了准确地分析结构在波浪冲击载荷作用下的振动、碰撞和船首张开破坏等动力响应，估算结构的阻尼特性是非常重要的。本文对框架-结构模型进行了冲击锤冲击试验，得到了其阻尼特性与振型和频率的关系。在欧拉梁运动方程中建立了比例阻尼模型，开发了冲击响应计算系统。利用所得到的阻尼特性，对冲击响应进行了仿真，仿真结果与实验结果吻合较好

It is very important to estimate the the damping charactors of the structures, in order to analyze exactly the dynamic strucural responce, for example the vibration, the collison and the bow flare damages by wave impact loads etc. In this research, frame-structure models were impacted by impact hammer, and the relations between their damping characters and vibration modes or frequencies were obtained. Then the system to calculate the impact responce was developed, constructing a proportinal damping model into the equations of motion for Euler Beam. Using the damping charactos obtained, the simulation results for impact responce, were agreed with experimantal ones very well