海洋独立支撑钢管桩的涡振研究

对在水流、波浪力作用下海洋独立支撑结构所产生的涡振进行非线性研究.该研究的目的是通过改变独立支撑结构自振频率来控制结构产生的涡振,以避免结构产生涡振破坏.提出涡振概念;分析独立支撑结构1产生涡振条件、作用荷载、涡振频率以及振动方程的解.结果表明通过改变独立支撑结构EI值或采取一些特殊措施,增加结构的自振频率,来避免其在施工过程中产生的涡振破坏,对实际工程具有重大理论价值.

Research of Vortex Vibration for Offshore Indepent Steel-pipe Pile

The vortex vibration of offshore independence support structure under current and wave is studied by non-linear theory.The objective of the research was to control the vortex vibration of structure by changing its frequency so as to prevent it from producing breakage of vortex vibration.The concept of vortex vibration was put forwarded.It analyzed many character of independence support structure,for example the condition of produce vortex vibration,the load,structure frequency and the solution of vibration equation.The result seems to suggest that the EI value of steel pipe-piles are changed or some special measures are adopted to increase the free vibration frequency,so as to avoid it yield vortex destroy in the process of construction.This is an important value theory to actual engineering.