【摘要】 密闭容器内的液体受热膨胀后,会挤压容器并使其受力变形直至破裂,而传统的流固耦合分析方法难以解决这种流固耦合场、应力场和温度场等多场耦合的问题.利用等效表面载荷的方法来模拟膨胀的液体与固体之间的相互作用,可分析在温度升高过程中内部充满液体的某个容器的受力情况.通过本方法对容器进行动态应力分析,可等效得到容器某个部分结构失效时,容器内壁所受载荷的具体大小及其容积的变化,并可对应得到某处结构失效时刻的准确温度.该方法可有效解决多场耦合的问题,并且省去液体模型,提高分析和计算速度.结合电池冷却箱受热膨胀的算例进一步阐释该方法.更多还原

【Abstract】 While the liquid in an airtight container is being heated,the container will be deformed and even fractured. It can hardly be solved by traditional fluid-solid coupling analysis method,because it is a multi-field coupling problem,which includes fluid-solid coupling field,stress field,temperature field,and so on. A method of equivalent surface load is proposed to simulate the fluid-solid interaction in the process of thermal expansion,which can be used for stress analysis on the force of a container filled with liquid in the process of temperature increase. With the dynamic stress analysis of the container using the method,the specific load on the container inner wall and the volume change can be obtained when the structural failure appears,and the accurate temperature of the failure part at the failure time can be obtained. The method can effectively solve the multi-field coupling problem,and the speed of analysis and calculation can be improved while the liquid model is omitted. The method is further explained by the thermal expansion example of a battery cooling tank.更多还原