单壳船侧结构的碰撞能量吸收

文章提出一种近似的解析方法评估单壳船侧结构的耐撞性。首先研究了单轴对称工字梁在横向载荷作用下结构从形成塑性铰到弦响应的力学过程，导出能量和变形的近似解析关系，然后考虑球鼻首和船侧结构的碰撞性将主要受撞区域舷侧板梁组合结构离散成为多个单轴对称工字梁，得到单壳舷侧结构碰撞过程能量吸收的近似公式，同时研究了球鼻形状以及不同碰撞位置对结构变形与能量吸收的影响。对散货船单壳舷侧结构的耐撞性用本文近似理论公式

Energy Absorb of Ship Single Side Structure in Collision

An approximate analytical method to evaluate the collision resistance of ship single side shell stracture is proposed.At first,the mechanical process from the forming of plastic hinges of an asymmetric I beam under transverse load to string response is analyzed,and the analytical approximate relations between the load and the energy absorbed is obtained.In order to analyze the collision between side structure of struck ship and bow of the striking ship,the collision zone of ship side is modeled by a group of I beam with the same properties.By combining the results of all these I beam,the approximate collision response equations of the single side shell are obtained.The influence due to the variability of bow shape and striking position is also compared.Good agreements are obtained between the present results and dynamic plastic finite element analysis by program DYTRAN.