NONLINEAR DYNAMICS RESPONSE OF CASING PIPE UNDER COMBINED WAVE-CURRENT  

作　　者：TANG You-gang（唐友刚） GU Jia-yang（谷家扬） ZUO Jian-li（左建立） MIN Jian-qin（闵建琴） 

机构地区：[1]Department of Naval Architecture and Ocean Engineering, School of Civil Engineering, Tianjin University, Tianiin 300072. P. R. China

出　　处：《Applied Mathematics and Mechanics(English Edition)》2005年第8期1040-1046,共7页应用数学和力学（英文版）

基　　金：国家自然科学基金，国家'985工程'建设项目

摘　　要：The vortex-induced nonlinear vibration of casing pipes in the deep water was studied considering the loads of current and combined wave-current. The vortex-induced vibration equation of a casing pipe was set up considering the beam mode and Morison＇s nonlinear fluid loads as well as the vortex-excited loads. The approach of calculating vortex-excited nonlinear vibration by Galerkin＇s method was proposed. The natural vibration frequencies and modes were obtained, and the response including primary resonance induced by current and the composite resonance under combined wave-current for the 170 m long casing pipe in the 160 m depth of water were investigated. The results show that the dynamics response of casing pipe obviously increases, and the complicated response behaviors of casing pipe are described under combined wavecurrent.The vortex-induced nonlinear vibration of casing pipes in the deep water was studied considering the loads of current and combined wave-current. The vortex-induced vibration equation of a casing pipe was set up considering the beam mode and Morison＇s nonlinear fluid loads as well as the vortex-excited loads. The approach of calculating vortex-excited nonlinear vibration by Galerkin＇s method was proposed. The natural vibration frequencies and modes were obtained, and the response including primary resonance induced by current and the composite resonance under combined wave-current for the 170 m long casing pipe in the 160 m depth of water were investigated. The results show that the dynamics response of casing pipe obviously increases, and the complicated response behaviors of casing pipe are described under combined wavecurrent.

关 键 词：casing pipes in the deep water fluid dynamics combined wave-current vortex-excited vibration composite resonance 

分 类 号：TU311.3[建筑科学—结构工程]