【摘要】 针对C/C复合材料飞机(B757)刹车盘制动过程中温度测量过程复杂和温度场难于表征的问题,采用有限元方法结合惯性台实验对其温度场进行了分析研究。根据刹车盘制动原理和传热原理,确定了温度场有限元分析中的载荷、边界条件和加载过程。通过仿真后处理形象地描述了制动过程中刹车盘温度场的变化,直观地表现了温度场分布状态。结果表明:在正常着陆的能量条件下中间静盘处测温点在46 s时达到最高温度659℃;承压盘和压紧盘的测温点则在48.5 s时达到最高温度,整个过程各点温度先升高后降低,中间静盘的热负荷最大,温升最快,承压盘次之,压紧盘最小。对比实验测量与仿真结果,两者吻合较好,证实温度场的有效性。更多还原

【Abstract】 The temperature fields of C/C composites braking discs(B757) were studied by the finite element method and experiment,as they were difficult to measure and reveal during the braking process.The loads,boundary conditions and loading processes in the finite element analysis of temperatures were discussed according to the heat transfer theory and braking principle of the braking discs.The postprocessing of simulation describes the temperature fields of braking discs during braking clearly and visually.The results show that the temperature of the midial stator rises to the maximum 659℃ at 46 s;the temperature of the pressure bearing disk and pressurizing disk rises to the maximum at 48.5 s and the temperature of each test point increases firstly and then decreases in the whole braking process,while the midial stator endures the biggest thermal load,followed by the pressure bearing disk and the pressurizing disk endures the least thermal load.The simulation results are consistent with the experiment data,which verifies the validity of the temperature field results.更多还原