最优应力波形下的冲击机械冲锤部件的反演设计及参数优化
发布时间：2019-04-16 10:52
【摘要】：受空间环境下月壤采样机构能源供给的限制,立足于一般的冲击机械模型,假定岩土动态加载刚度一定的情况下分析比较了不同形式入射波形对岩土介质作功过程中能量传递效率情况。以实现最优指数应力波形为目标,基于一维波动力学理论及δ(t)函数法对冲锤部件的波阻抗进行反演设计,并使用正解计算和有限元仿真的方法验证反演设计的正确性。运用假设脱离法分析了冲锤与击杆之间的受力及运动状态,分析了冲锤几何外形无量纲参数影响下能量传递效率和冲锤冲击效率的变化规律并计算相关的最优参数。
[Abstract]:Limited by the energy supply of the lunar soil sampling mechanism under the space environment, it is based on the general impact mechanical model. Assuming that the dynamic loading stiffness of the rock and soil is constant, the energy transfer efficiency of different forms of incident waveforms in the course of working on the rock and soil medium is analyzed and compared. Based on the one-dimensional wave dynamics theory and the 未-(t) function method, the inverse design of the wave impedance of the impact hammer component is carried out in order to realize the optimal exponential stress waveform, and the correctness of the inversion design is verified by the positive solution calculation and finite element simulation. The stress and motion state between the impact hammer and the impact rod are analyzed by means of hypothesis disengagement method. The variation rules of energy transfer efficiency and impact efficiency under the influence of the dimensionless parameters of the geometry shape of the punch are analyzed and the relevant optimal parameters are calculated.
【作者单位】： 哈尔滨工业大学飞行器动力学与仿真研究所;
【基金】：国家自然科学基金项目(51305093) 中国博士后科学基金特别资助(2014T70317) 山东省自然科学基金项目(ZR2013EEQ004)
【分类号】：P634.1;P184.5
本文编号：2458714
[Abstract]:Limited by the energy supply of the lunar soil sampling mechanism under the space environment, it is based on the general impact mechanical model. Assuming that the dynamic loading stiffness of the rock and soil is constant, the energy transfer efficiency of different forms of incident waveforms in the course of working on the rock and soil medium is analyzed and compared. Based on the one-dimensional wave dynamics theory and the 未-(t) function method, the inverse design of the wave impedance of the impact hammer component is carried out in order to realize the optimal exponential stress waveform, and the correctness of the inversion design is verified by the positive solution calculation and finite element simulation. The stress and motion state between the impact hammer and the impact rod are analyzed by means of hypothesis disengagement method. The variation rules of energy transfer efficiency and impact efficiency under the influence of the dimensionless parameters of the geometry shape of the punch are analyzed and the relevant optimal parameters are calculated.
【作者单位】： 哈尔滨工业大学飞行器动力学与仿真研究所;
【基金】：国家自然科学基金项目(51305093) 中国博士后科学基金特别资助(2014T70317) 山东省自然科学基金项目(ZR2013EEQ004)
【分类号】：P634.1;P184.5
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