Finite Element Model Updating and Verification of Satellite-borne Slot Waveguide Based on Random Vibration Test

2018 3rd International Conference on Reliability Engineering

工业技术（总论）

Weimin, Sun^1 ; Weizhong, Cao^1 ; Mingbo, Tong^2

Nanjing Research Institute of Electronics and Technology, Nanjing

210039, China^1

Nanjing University of Aeronautics and Astronautics, Nanjing

210016, China^2

关键词: Analytical dynamics;    Connecting stiffness;    Finite-element model updating;    Modal frequency;    Random vibration test;    Root Mean Square;    Slot waveguide;    Vibration data;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/575/1/012021/pdf
DOI  :  10.1088/1757-899X/575/1/012021

学科分类：工业工程学

来源: IOP

【 摘 要 】

For an axial free-floating slot waveguide, finite element model updating and verification based on the vibration data are studied. The slot waveguide and the free-floating side are modeled by shell element and spring element respectively. The two slot waveguide structures are applied to modal and random vibration test getting the modal frequencies, root mean square of acceleration. The finite element are first verified by tested modal data, and then the connecting stiffness will be updated by random vibration test data. These results show that the analytical dynamic responses of the updated finite element are well compared with the test responses, and the maximum error is 3.8%. The spring element could also model the free-floating side well and verify the accuracy for dynamic analysis.