自行火炮行动系统疲劳可靠性分析的CAE仿真方法  

CAE Simulation Method about Fatigue Reliability Analysis of Driving Systems of a Self-Propelled Gun

作　　者：易当祥[1] 吕国志[1] 徐颖强[1] 

机构地区：[1]西北工业大学,陕西西安710072

出　　处：《西北工业大学学报》2006年第3期321-325,共5页Journal of Northwestern Polytechnical University

摘　　要：提出了自行火炮行动系统疲劳可靠性分析的CAE仿真方法。建立自行火炮虚拟样机模型,并仿真获得了各典型行驶工况下的行动系统关重件的载荷时间历程。以扭力轴为主要研究对象,对其载荷历程进行计数统计、参数估计与检验、合成与扩展,并在有限元分析的基础上获得了扭力轴最危险部位的全寿命里程二维疲劳应力设计谱。考虑各种横向影响因素的随机性,利用M onte-Car-lo和3-6-1BP网络仿真了扭力轴的p-Sa-Sm-N曲面。由MTPM iner准则和ETPM iner准则,进行了扭力轴的疲劳可靠性分析。并由仿真结果对扭力轴大小修周期提出了合理的建议。CAE （Computer Aided Engineering） simulation method is presented to predict fatigue reliability of driving systems of a self-propelled gun. The virtual prototype of the self-propelled gun is built and simulated to obtain the loading of the key components of driving systems under various conditions. The torsion shaft is studied and simulated. Its stochastic loadings under various conditions are counted and their parameters of distribution are verified. And these loadings are also synthesized and extended. The two-dimensional fatigue stress design spectrum of the whole live is established with finite element analysis. Considering the randomness of transverse effect factors, we obtain the P-Sa-Sm-N surface formula of the torsion shaft based on Monte-Carlo＇s sampling and 3-6-1 BP （back propagation） neural network＇s simulation. The fatigue reliability lives of the torsion shaft are predicted under the fatigue stress design spectrum with MTPMiner rule and ETPMiner rule. Moreover, some reasonable suggestions are given for the repair periods of torsion shafts.

关 键 词：自行火炮 扭力轴 疲劳可靠性 设计谱 虚拟样机 CAE仿真 

分 类 号：O346[理学—固体力学]