Research on transmission paths of a coupled beam-cylindrical shell system by power flow analysis

A power flow analysis based on a substructure approach is performed to exhibit vibration transmission in a complex coupled beam-cylindrical shell system. The system is divided into a shell substructure and a beam substructure, which are coupled by three spring-dampers. The theoretical receptance function of each substructure with a free-free interface condition is formulated by modal analysis to describe the dynamical behavior. On the basis of the receptance functions of the two substructures as well as synthesis through the geometrical compatibility and force balance conditions at the coupling interfaces, the dynamic characteristics of the coupled system are calculated. Both the input and transmitted powers within the system are estimated, and the influences of the excitation locations, the stiffness and loss factor of the spring-dampers on the vibration transmission are investigated as well. This paper was recommended for publication in revised form by Associate Editor Eung-Soo Shin G.P. Feng received his Ph.D. from the School of Mechanical Engineering at Shanghai Jiao Tong University. His research interests include vibration analysis, control and sound radiation, etc. Z.Y. Zhang received his Ph.D. from the School of Mechanical Engineering at Shanghai Jiao Tong University. Dr. Zhang is currently a Professor at the School of Mechanical Engineering at Shanghai Jiao Tong University in Shanghai, China. Y. Chen received his Ph.D. from the School of Mechanical Engineering at Shanghai Jiao Tong University. His research interests include vibration and shock analysis. H.X. Hua received his Ph.D. at the University of Brussels in Belgium. Dr. Hua is currently a Professor and Doctoral Supervisor at the School of Mechanical Engineering at Shanghai Jiao Tong University in Shanghai, China. His research interests include modal parameter identification, and analysis of vibration and shock.