楼体建筑中金属波纹管被冲击下的热温度场模拟

Thermal temperature field simulation of metal bellows under impact in buildings

为了提升楼体建筑中金属波纹管抗冲击、抗热损伤的性能,对其受冲击时的热温度场展开模拟分析。以可能发生热冲击的炼油厂楼梯中的金属波纹管为例,用Fluent有限元软件构建金属波纹管的有限元模型,划分网格并确定边界条件,通过有限元流固耦合计算,得到金属波纹管在不同热冲击时刻的温度场变化情况,分析冲击路径的温度变化。划分试验点,从横纵两个方向模拟热循环变化趋势。结果表明:热冲击作用下,金属波纹管由外壁向内壁温度逐渐升高,冲击发生4 s后,高温传递至整个金属波纹管,从热循环趋势看,金属波纹管的外壁温度先升高,热冲击停止后,温度逐渐降低,热循环趋势与温度场变化情况相对应。

In order to improve the impact resistance and thermal damage resistance of metal bellows in buildings,the thermal temperature field under impact was simulated and analyzed.Taking the metal corrugated pipe in the staircase building of the refinery where thermal shock may occur as an example,the finite element model of metal corrugated pipe was built using Fluent finite element software,the grid was divided and the boundary conditions were determined.Through the finite element fluid structure coupling calculation,the temperature field changes of the metal corrugated pipe at different thermal shock moments were obtained,and the temperature changes on the impact path were analyzed.The test points were divided and the change trend of thermal cycle were simulated from horizontal and vertical directions.The results show that under the effect of thermal shock,the temperature of the metal corrugated pipe gradually increases from the outer wall to the inner wall.After 4 s of impact,the high temperature is transferred to the entire corrugated metal pipe.From the perspective of the thermal cycle trend,the outer wall temperature of the metal threaded pipe firstly increases,and after the thermal shock stops,the temperature gradually decreases.The thermal cycle trend corresponds to the change of temperature field.