基于二自由度的垂直冲击试验机参数设计计算方法  

The Parameter Design Calculation Method for Drop Shock Testers Based on Two-Degree-of-Freedom Model

作　　者：徐曼 XU Man(Suzhou Siliyo Technology Co.,Ltd.,Suzhou 215337)

机构地区：[1]苏州世力源科技有限公司,苏州215337

出　　处：《环境技术》2021年第1期223-229,共7页Environmental Technology

摘　　要：以垂直冲击试验机为应用背景,采用二自由度弹簧-质量-阻尼模型建立垂直冲击试验机的动力学模型。针对缓冲气囊的非线性特征,模型中直接采用了缓冲气囊的力位移曲线,大大提高了动力学模型的精度。通过龙格库塔方法求解此动力学方程组的数值解,并使用一维搜索方法不断矫正所需的冲击波形,快速迭代计算出满足要求的波形指标所需要的设计参数。最后基于Lab Windows/CVI开发平台,开发了垂直冲击试验机参数设计软件,通过试验验证对比,验证了该动力学模型的准确性及设计参数计算方法的正确性。该模型和计算方法对垂直冲击试验机的设计参数计算具有指导意义。At the application background of vertical impact testing machine,a two-degree-of-freedom spring-mass-damping dynamic model was established.Considering about the nonlinear characteristics of the buffer airbag,the force displacement curve of the buffer airbag is directly adopted in the model,which dramatically improves the precision of the dynamic model.The Runge-Kutta method was used to solve the numerical solution of the dynamic equations,and the one-dimensional search method was employed to constantly correct the required shock waveform and obtain the design parameters.At last,a parameter design software of vertical impact testing machine is developed based on Lab Windows/CVI platform.Compared with experiment,the accuracy of the dynamic model and parameter design calculation method are verified.This model and method provide the practical guidance of parameter design of vertical impact testing machine.

关 键 词：垂直冲击试验机 龙格库塔法 一维搜索 Lab Windows/CVI 

分 类 号：V245.5[航空宇航科学与技术—飞行器设计]