【摘要】 针对一类冲击-振动耦合力学试验的技术需求，提出了一种短间隔连续冲击及颗粒体自激振动复合的冲击-振动耦合力学试验方法，并研制了试验系统样机。基于EDEM软件和VC++二次开发建立了试验系统自激振动结构的离散元耦合仿真模型，分析了颗粒体自激振动响应的一般规律，在此基础上根据应用需求优化选择自激振动加载方案。基于研制的力学试验系统样机和自激振动方案开展试验研究，通过分析对比连续冲击加载和冲击-振动耦合加载响应加速度时频域信号，验证了选择的颗粒体自激振动加载方案的实际作用效果，该试验系统可满足一些苛刻高动态连续冲击试验和连续冲击-多频振动耦合试验的需求，研究具有较好的科学意义和工程应用价值。更多还原

【Abstract】 Here, to meet technical requirements of a kind of impact-vibration coupled mechanical test, a short interval continuous impact and particle body self-excited vibration being combined impact-vibration coupled mechanical test method was proposed, and the test system’s prototype was developed. Based on the secondary development with the software EDEM and VC++, the discrete element coupling simulation model for self-excited vibration structure of the test system was established to analyze general laws of particle body self-excited vibration response. Then, the self-excited vibration loading scheme was chosen optimally according to application requirements. Based on the prototype of the mechanical test system developed and the self-excited vibration loading scheme, the test study was conducted. By analyzing contrastively time-frequency domain signals of response acceleration of continuous impact loading and impact-vibration coupled loading, the practical application effect of the chosen particle self-excited vibration loading scheme was verified. It was shown that the test system can meet requirements of some rigorous high dynamic continuous impact tests and continuous impact-vibration with multi-frequency coupled tests; the study has better scientific significance and engineering application value.更多还原