仿生虎鲸瞬时负载数值模拟

As a kind of bionic robot fish,bionic killer whale played an important role in ocean development and scientific investigation.Based on the theory of flapping wing movement,the biomimetic killer whale was designed in the way of fish propulsion,the load was nonlinear,time-varying and strongly coupled.The bionic killer whale‘s force model was established through the analysis of the bionic killer whale’s straight line and turning movement.The instantaneous load’s text file of bionic killer whale was generated by MATLAB,the instantaneous load was successfully introduced into the rigid-flexible coupling model by ADAMS spline function,which provided a method and condition for qualitative and quantitative analysis of bionic killer whale’rigid-flexible coupling reliability analysis.The results show that MATLAB can accurately simulate the periodic change of the bionic killer whale’s instantaneous load,providing a clear quantitative data for the bionic killer whale’s reliability research

MG 400/951型采煤机截割部行星架时变可靠性分析

截割部行星架作为采煤机的关键零件，其时变可靠性对采煤机的综合性能有着重要的影响。基于Pro/E建立以截割部行星架为模态中性文件的采煤机刚柔耦合模型，研究截割部行星架的动力学性能，获得了截割部行星架薄弱区域和动态应力。基于Matlab获得了截割部行星架薄弱区域三参数威布尔分布的概率密度函数，利用Kstest函数验证其拟合的合理性。依据疲劳寿命可靠性理论，建立了截割部行星架疲劳寿命可靠性模型，计算得到基于Copula函数的截割部行星架多薄弱区域时变可靠度由0.936 2呈指数退化趋势，直至截割部行星架失效，结合可靠性灵敏度设计理论分析了截割部行星架多薄弱区域设计变量对其时变可靠性的影响程度，为截割部行星架的研究提供了理论基础和准确的数据支撑