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该论文基于有限元方法对发动机降温过程进行了瞬态温度场仿真计算,确定了发动机在降温过程中达到温度平衡的时间,为发动机保温试验提供数据支撑。另外,发动机降温之后再进行升温,由于壳体和推进剂的热膨胀系数不同,在药柱内产生了热应力和热应变,该论文对该过程药柱的应力、应变分布进行仿真研究,为发动机温度梯度试验提供数据支撑。
Based on the finite element method, the transient temperature field of the engine is simulated and the time to reach the temperature balance during the cooling process is determined, which provides the data support for the engine thermal insulation test. In addition, the engine cooling after the temperature increase, due to the thermal expansion coefficient of the shell and propellant in different thermal stress and thermal strain in the column, the paper on the process of stress distribution of the column, the strain distribution simulation study for the engine Temperature gradient test provides data support.