低温环境下典型船体结构的反复碰撞损伤

Repeated Collision Damage of Hull Structure at Low-Temperature Environment

针对极地低温环境中船舶在重复载荷作用下的结构损伤问题,基于EH36钢开展低温及常温环境下船体平板和加筋板的反复加卸载试验及有限元仿真研究。结果表明,仿真与试验结果吻合较好,验证了仿真方法的有效性。根据试验及仿真结果给出了重复载荷作用下构件的损伤变形、接触力、能量吸收等特性规律,并通过低温及常温结果对比发现低温环境下船体结构承载能力增强,研究结果可为极地船舶结构强度初期设计提供参考。

To study the damage of hull structures under the repeated loads in the polar low-temperature environment,the experimental and numerical finite element analysis research of the repeated loading on the plate and the stiffened plate at the low-temperature and normal-temperature are carried out based on EH36 steel.The results show that the results of finite element analysis agree well with the test results,which can verify the effectiveness of the simulation method.The damage deformation,contact force and energy absorption are obtained based on the experimental and numerical results,and the characteristics of the members under the repeated loads are illustrated.It can be found that the bearing capacity of the plate structures are enhanced at low-temperature compared with that at normal-temperature.The achievements in the study can provide some references for the initial design of hull structure strength.