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火灾环境下液化气球罐受热辐射的作用引起热响应 ,即罐内介质温度和压力发生变化 ,罐体温度也发生变化。本文基于火灾环境下液化气球罐的瞬态热响应的有限元分析 ,采用ANASYS的热—结构耦合有限元分析方法 ,研究火灾中不同温度和压力的作用下球罐的应力分布。根据应力分类方法 ,进行强度计算 ,评价高温环境下球罐的安全性。研究表明 4 0 0℃环境下均匀受热的液化气球罐在气液相交界处由于压力和温度的变化而不能满足强度条件 ,会导致球罐在该部位破裂
The thermal response of the liquefied gas balloon tank under the fire environment caused by the heat radiation, that is, the temperature and pressure of the tank medium change, and the temperature of the tank body also changes. Based on the finite element analysis of the transient thermal response of a liquefied gas balloon tank in a fire environment, the thermal-structural coupled finite element analysis method of ANASYS is used to study the stress distribution of the tank under different temperatures and pressures in a fire. According to the stress classification method, the intensity calculation is carried out to evaluate the safety of the spherical tank under the high temperature environment. The research shows that the uniformly heated liquefied gas balloon can not meet the strength conditions at the gas-liquid interface due to the change of pressure and temperature at the temperature of 400 ℃,