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《Journal of Vibration and Shock》 2012-20
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Static and dynamic characteristics optimization for a whole large-sized thread grinder based on joint surface

WANG Yu-lin,WU Xiao-feng,FENG Hu-tian (School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)  
To accurately predict the static and dynamic characteristics of a whole large-sized thread grinder,parameters of its joint surface were considered in its FE model.The contact features of the joint surface was simulated with a spring-damping element,and the stiffness and damping of the joint surface was calculated with Yoshimura Method.The FE model of the whole grinder based on the joint surface was established with ANSYS,to find its weak points and study the influence of the joint surface stiffness on the static and dynamic characteristics of the whole grinder.Then the stiffness of the joint surface having more influence was optimized to improve the dynamic characteristics of the whole grinder.The results showed that the static stiffnesses in x,y and z directions increase by 15%,19% and 7%;each modal frequency increases at different levels,and the first modal frequency increases by 10%;the resonant amplitude is reduced about 1/2,and the vibration of the whole grinder is suppressed obviously.
【Fund】: 国家科技重大专项(2009ZX04001-171-02)
【CateGory Index】: TG580.6
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