机械制造与自动化2025，Vol.54Issue(5)：62-66,5.DOI:10.19344/j.cnki.issn1671-5276.2025.05.012
线角复合随机振动试验参考谱定义方法
Definition Method of Reference Spectral Density for Synthetical Linear-angular Random Vibration Test
谢文蔚 1贺旭东1
作者信息
- 1. 南京航空航天大学 航空学院,江苏 南京 210016
- 折叠
摘要
Abstract
To achieve synthetical linear-angular random vibration testing,the vibration reference spectral density definition method for structural translational and rotational degrees of freedom was studied.Based on the coordinate transformation relationship between the acceleration response of control points and the translational and rotational degrees of freedom of the structure,formulas for calculating the root mean square magnitude of random linear vibration and angular vibration were derived.The structure was considered as a rigid body,and its movement kept consistent with the motion mode of the control point,Thus the shape of the reference spectral density of the linear-angular composite random vibration test fitted the one of the control point test spectral density.The root mean square values of the linear vibration and angular vibration were calculated from the given proportion of the structural linear vibration and angular vibration magnitude and the control point test spectral density.A two degree of freedom synthetical linear-angular random vibration control experimental system was constructed to achieve the beam model synthetical linear-angular random vibration experimental control,verifying the feasibility of the proposed reference spectral density definition method.关键词
振动环境试验/多输入多输出/随机振动/线角复合控制/参考谱Key words
vibration environment test/multiple-input multiple-output/random vibration/synthetical linear-angular control/reference conditions分类
机械制造引用本文复制引用
谢文蔚,贺旭东..线角复合随机振动试验参考谱定义方法[J].机械制造与自动化,2025,54(5):62-66,5.
