基于自适应遗传算法的爆炸冲击响应谱时域重构优化方法  

Time Domain Reconstruction Optimization of Pyrotechnic Shock Response Spectrum via Adaptive Genetic Algorithm

作　　者：孙文娟[1,2] 陈海波[1] 黄颖青[1] SUN Wenjuan;CHEN Haibo;HUANG Yingqing(CAS Key Laboratory of Mechanical Behavior and Design of Materials,Department of Modern Mechanics,University of Science and Technology of China,Hefei 230026,China;Institute of Information Engineering,Anhui Xinhua University,Hefei 230088,China)

机构地区：[1]中国科学技术大学近代力学系中国科学院材料力学行为和设计重点实验室,安徽合肥230026 [2]安徽新华学院信息工程学院,安徽合肥230088

出　　处：《高压物理学报》2019年第5期65-74,共10页Chinese Journal of High Pressure Physics

基　　金：国家自然科学基金(11772322);军委装备发展部预研领域基金(6140246030216ZK01001);中国科学院战略性先导科技专项(B类)子课题(XDB22040502)

摘　　要：为解决现有爆炸冲击响应谱(Shock Response Spectrum,SRS)加速度重构方法依赖于大量试验数据的问题,对比了阻尼正弦与小波两种不同加速度重构方法在合成爆炸冲击响应谱时的性能。将对重构SRS质量的评估转化为与目标谱匹配度的最小值优化问题,并首次将自适应遗传算法(Adaptive Genetic Algorithm,AGA)应用于SRS重构的优化问题中。对比了交叉先行、变异先行和不定向3种不同的AGA在爆炸冲击响应谱时域重构优化中的性能,并与基本遗传算法(Genetic Algorithm,GA)进行对比。结果表明,AGA的优化结果比GA有较大幅度的改善,且不定向AGA所得结果是3种AGA方法中最好的,其SRS各频点数值均在(–3/+6)dB容差范围之内,与目标谱的匹配度更好。仿真对比算例验证了该方法在冲击响应谱的时域重构应用中具有较高的准确性和实用性,为进一步提高航天器结构在爆炸冲击载荷下响应的计算精度提供了支撑。In order to solve the problem that the existing acceleration reconstruction methods rely on a large number of test data,this paper compares the performances of two different acceleration reconstruction methods,the damped sine and the wavelet.The evaluation of the quality in reconstructing shock response spectrum(SRS)is transformed into the minimum optimization problem of the matching degree of the reconstructed SRS with the target spectrum.The adaptive genetic algorithm(AGA)is applied to the optimization problem of SRS reconstruction for the first time.This paper compares the performances of three different AGAs in time domain reconstruction and optimization of SRS,which are crossover first,mutation first and uncertain-order AGAs,and compares them with the genetic algorithm(GA).Numerical tests show that AGA’s optimization results are much better than GA’s,and the results obtained by uncertain-order AGA are the best among the three AGA methods,through which all frequency points are within the tolerance range of(–3/+6)dB.This research provides support for further improving the response simulation accuracy of spacecraft structure under pyrotechnic shock loads.

关 键 词：冲击响应谱 爆炸冲击 时域重构 优化 自适应遗传算法 

分 类 号：V415.4[航空宇航科学与技术—航空宇航推进理论与工程]