Stiffness Prediction Model and Vibration Characteristics Analysis of Composite Bolt Connection Structure
Under dynamic loads,relative motions with small amplitudes will occur at the bolted joints.The long-term accumulation of this relative motion can easily lead to wear of the connection interface,decline of bolt preload,and reduction of joint stiffness,which will significantly affect the dynamic characteristics of assembly structures and increase difficulty in predicting and controlling structural response.This paper proposes a dynamic analysis method for composite bolted joints considering the stiffness of bolted joints.The fractal contact theory and finite element method are used to reconstruct the real rough surface,and contact analysis is performed to obtain the contact stiffness.Then a spring surface model is used to simulate the contact stiffness of the real rough surface,and it is integrated into the dynamic analysis of jointed structures.Based on this,the dynamic characteristics of composite bolted connection plates were analyzed,and the dynamic experimental results were well verified the proposed modeling analysis method.
万方数据
维普
