摘要
地面冲击试验是航空航天设备投入使用前必不可少的阶段,因此冲击波形发生器对冲击载荷复现是至关重要的环节之一。针对冲击波形重复精度低和可控性差的问题,提出一种面向多孔式冲击波形发生器的波形控制方法。根据阻尼孔的流动特性和活塞的受力状态,建立试验系统的冲击响应计算模型及其离散计算形式。考虑子集模拟优化算法面对高维复杂优化问题时具有收敛快、不易陷入局部最优解的优势,使用该算法寻求各排阻尼孔数量的最优离散组合,并与遗传算法进行对比。结果表明:对于不同试验要求,优化后加速度波形曲线均满足试验标准规定的容差,优于遗传算法。
The ground impact test is an indispensable stage before aerospace equipments are put in service,so that shock wave generator is one of the most important tool for the reappearance of impact loading.In order to solve the issues of low repetition accuracy and poor controllability of shock wave,a waveform control method for porous-type shock waveform generator was proposed.According to the flow characteristics of the damping hole and the stress state of the piston,the shock response calculation model of the test system was established,as well as its discrete calculation formulation.Taking into account that the subset simulation optimization algorithm has the advantage of fast convergence and avoiding getting trapped in a local optimal solution when facing high-dimensional complex optimization problems,the algorithm was used to seek the optimal discrete combinations of the number of damping holes in each row and the results were compared with those by the genetic algorithm.The results show that,for different requirements,the optimized acceleration waveform curves can meet the tolerance specified in the corresponding standard,which are better than those obtained by the genetic algorithm.
作者
李凡
李洪双
LI Fan;LI Hongshuang(School of Aeronautics,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)
出处
《振动与冲击》
北大核心
2025年第6期82-89,136,共9页
Journal of Vibration and Shock
基金
江苏高校优势学科建设工程。
关键词
冲击波形发生器
阻尼孔
加速度波形
子集模拟优化
遗传算法
impact waveform generator
damping hole
acceleration waveform
subset simulation optimization
genetic algorithm
作者简介
第一作者:李凡,男,硕士生,2000年生;通信作者:李洪双,男,博士,教授,1978年生,E-mail:hongshuangli@nuaa.edu.cn。
