太阳辐射下LNG不锈钢储罐罐壁温度场和温度效应研究

Research on Temperature Field and Temperature Effect of LNG Stainless Steel Storage Tanks Exposed to Solar Radiation

LNG不锈钢储罐建造工期一般为6~8个月,施工过程中钢材表面受到太阳辐射作用引起温度效应会对结构产生影响。通过有限元模拟,研究储罐罐壁在太阳辐射下的非均匀温度场分布规律。结果表明:纬度每增加10°,最高温度增加约3%;考虑太阳辐射作用与仅考虑重力作用工况相比,罐壁的最大应力和最大径向位移分别增加了96%和832%;在进行保冷层施工时,需要预留30 mm的间隙,以保证结构完整性。

The construction period of LNG stainless steel storage tank is generally 6 to 8 months.During the construction,the steel surface is affected by solar radiation and the temperature effect will affect the structure.Through the finite element simulation,the non-uniform temperature field distribution of the tank wall under solar radiation was obtained,and it was found that when the latitude increased by every 10°,the maximum temperature increased by 3%.Considering the solar radiation,the maximum stress and maximum radial displacement of the tank wall increased by 96%and 832%,respectively,compared with the working condition considering only the effect of gravity.During the construction of cold insulation layer,a gap of 30 mm should be reserved to ensure the structural integrity.