基于集总参数法的坦克稳态热分析模型

为了掌握坦克的热状况,发展了一个坦克稳态热分析模型,基于集总参数法将整车划分为若干热单元,考虑了坦克自身产热、传热和外界环境的影响,建立了热平衡方程,构建了由热单元、产热源、导热热阻、对流传热热桥、辐射换热源等组成的热网络。模型计算的温度值与实车测试值对比,误差小于7%。对某型坦克高速度行驶稳态工况进行热分析,得到了坦克整体表面温度分布、高温部位温度及其热量分配状况。

A Thermal Analysis Model Based on Lumped Parameter for Tank Stable Working Conditions

In order to know well the thermal status of tank,a thermal analysis model is developed for tank under stable working conditions.The total tank is divided into various heat units based on lumped parameter method.The thermal balance equation for heat units is established,the effects of heat generation,heat transfer and atmosphere are considered.The heat network that includes heat units,heat generation source,heat conduction resistance,heat convection bridge and heat radiation source is constructed.The comparison is carried out between the calculated and tested temperatures of heat units,the maximum relative error is less than 7%.The thermal analysis is carried into execution for the stable running of certain tank at high speed,in result,the whole surface temperature distribution,temperature of the higher temperature parts and the heat distribution are obtained.