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 160m 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 wave-current.
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 wave_current.
出处
《应用数学和力学》
EI
CSCD
北大核心
2005年第8期951-956,共6页
Applied Mathematics and Mechanics
基金
Project supported by the National Natural Science Foundation of China (No.50279026) andthe National985Engineering Project in China
关键词
深水套管
流体动力
波流联合
涡激振动
组合共振
<Keyword>casing pipes in the deep water
fluid dynamics
combined wave-current
vortex-excited vibration
composite resonance
