摘要
航空发动机机匣具有良好的抗冲击性,是保证飞机安全运行的现实要求。针对机匣常用铝蜂窝夹芯结构,通过试验与仿真结合方法研究温度对其抗冲击性能的影响。首先,基于应变测试技术搭建温度可调冲击试验系统,开展不同温度下铝蜂窝夹芯板弹道冲击试验。其次,依据冲击试验条件进行仿真模拟,并将仿真结果与试验数据进行对比,验证仿真模型的可靠性。最后,通过LS-DYNA进一步开展不同温度下铝蜂窝夹芯结构机匣抗冲击性数值仿真分析。结果表明,温度在25~200℃范围内,铝蜂窝夹芯结构机匣抗冲击性随温度上升呈先增后减的趋势。研究结果对铝蜂窝夹芯结构机匣的温度效应研究具有一定的参考价值。
The aircraft engine casing has good impact resistance,which is a realistic requirement to ensure the safe operation of the aircraft.The effect of temperature on the impact resistance of the aluminum honeycomb sandwich structure casing is studied by combining the method of experiment and simulation.First,a temperature-adjustable impact test system is built based on the strain testing technology,and the ballistic impact test of aluminum honeycomb sandwich panels at different temperatures is carried out.Then,the simulation is carried out according to the impact test conditions,and the simulation results are compared with the test data to verify the reliability of the simulation model.Finally,the numerical simulation analysis of the impact resistance of aluminum honeycomb sandwich panels at different temperatures is further carried out by LS-DYNA.The results show that when the temperature is in the range of 25~200℃,the impact resistance of the aluminum honeycomb sandwich panel increases first and then decreases with the increase of temperature.The research results have certain reference value for the research on the temperature effect of aluminum honeycomb sandwich structure casing.
作者
左建华
杨书仪
谭毅
郭小军
孙要兵
Zuo Jianhua;Yang Shuyi;Tan Yi;Guo Xiaojun;Sun Yaobing(Hunan University of Science and Technology,Xiangtan 411201,China;AECC Hunan Aviation Powerplant Research Institute,Zhuzhou 412002,China;AECC South Industry Corporation Ltd.,Zhuzhou 412002,China)
出处
《航空科学技术》
2022年第8期23-31,共9页
Aeronautical Science & Technology
基金
湖南省自然科学基金(2020JJ4026),湖南省研究生科研创新项目(CX20210997)。
关键词
铝蜂窝夹芯结构机匣
温度
冲击试验
抗冲击性能
aluminum honeycomb sandwich structure casing
temperature
impact test
impact resistance
