动态力学模拟试验信号产生系统结构设计  

Structural design of signal generation system for dynamic mechanics simulation test

作　　者：朱成俊[1,2] 盛青山 刘立新 ZHU Chengjun;SHENG Qingshan;LIU Lixin(School of Mechanical Engineering,Henan Polytechnic Institute,Nanyang,Henan 473000,China;Henan Flexible Manu-facturing Engineering Research Center,Nanyang,Henan 473000,China)

机构地区：[1]河南工业职业技术学院机械工程学院,河南南阳473000 [2]河南省柔性制造工程研究中心,河南南阳473000

出　　处：《河北工业科技》2024年第5期391-398,共8页Hebei Journal of Industrial Science and Technology

基　　金：河南省高等学校重点科研项目(24B460008);河南省科技攻关项目(242102231033,232102220100)。

摘　　要：为解决现存高速碰撞动态力学模拟冲击试验存在的试验成本高、试验周期长,且无法实现连续多次高幅值冲击等问题,对高速连续冲击动态力学模拟试验信号产生系统结构进行了设计。通过对高速连续多次冲击信号进行靶场实测、仿真分析,揭示冲击信号特征,提出技术要求;根据信号特征,确定设计方案,利用“旋转式转盘+退让式冲击头”装置,产生连续多次高幅值、短间隔的冲击过载信号;通过模态分析及数值模拟,验证方案设计的可行性,并进行样机测试。结果表明:设计可实现模拟连续冲击大于10次,冲击幅值高于5000g,冲击时间间隔小于3 ms,且冲击时间间隔可调。设计可满足在实验室中对高速碰撞动力学信号的模拟检测,为实验室模拟高速连续冲击过程并进行冲击信号动态性能研究提供参考。To solve the problems of high testing cost,long testing cycle,and inability to achieve continuous high amplitude impact in the existing high-speed collision dynamic mechanics simulation impact test,a signal generation system structure of high-speed continuous impact dynamic mechanics simulation test was designed.By conducting field tests and simulation analysis on high-speed continuous multiple impact signals,the characteristics of the impact signals were revealed,and technical requirements were proposed.Based on the signal characteristics,the design scheme was determined and a"rotating turntable+yielding impact head"device was used to generate continuous high amplitude and short interval impact overload signals.The feasibility of the scheme design was verified through modal analysis and numerical simulation,and the prototype testing was conducted.The results show that the design can simulate continuous impacts greater than 10 times,with an impact amplitude greater than 5000 g,an adjustable impact time interval of less than 3 ms.The design can meet the simulation detection of high-speed collision dynamics signals in the laboratory,providing a method for simulating high-speed continuous impact processes and conducting dynamic performance research on impact signals.

关 键 词：机械动力学与振动 高幅值 短间隔 动态力学 模拟冲击试验 

分 类 号：TH-39[机械工程]