An identification method of stiffness of mechanical joint

Author

Jinjuan, Zhao ; Shijun, Wang ; Jingzhi, Ma ; Pu, Guo

Author_Institution

Inst. of Printing & Packaging Instrum. Eng., Xi´´an Univ. of Technol., Xi´´an, China

fYear

2011

fDate

16-18 April 2011

Firstpage

3925

Lastpage

3928

Abstract

A method based on finite element model is presented that is used to identify stiffness of mechanical joint. By means of shock excitation, response of the system is obtained in which joints are included. Fourier Transform is used to obtained response spectrum of system. Based on FEM, the system model including joints is build and then low order natural frequencies are obtained by modal analysis. Natural frequencies of finite element model are compared with resonance frequencies from response spectrum, data of joint stiffness in finite element model are modified. Through iterative computations, suitable data of joint stiffness are identified. Experiment result shows that the method is valid.

Keywords

Fourier transforms; couplings; elasticity; finite element analysis; iterative methods; modal analysis; shock waves; FEM; Fourier transform; finite element model; identification method; iterative computations; mechanical joint; modal analysis; resonance frequencies; response spectrum; shock excitation; stiffness; Damping; Fasteners; Finite element methods; Joints; Resonant frequency; Shape; Vibrations; Joint; Modal analysis; Parameter identification; Stiffness;

fLanguage

English

Publisher

ieee

Conference_Titel

Consumer Electronics, Communications and Networks (CECNet), 2011 International Conference on

Conference_Location

XianNing

Print_ISBN

978-1-61284-458-9

Type

conf

DOI

10.1109/CECNET.2011.5768606

Filename

5768606