桥梁水中施工平台钢管桩动力特性分析

介绍了平台钢管桩动力特性的求解方法。由于洪水期水流与钢管桩产生涡激振动,故首先需要分析钢管桩自身的动力特性也就是确定钢管桩的固有频率。动力特性求解就是模态求解,在详细讨论了模态求解的原理和方法的基础上,对大桥平台钢管桩进行了模态求解分析,并讨论了不同物理参数对结构的固有频率的影响。结果表明,钢管桩的固有频率与其自身长度、桩外径以及管壁厚度成反比。

Analysis on Dynamic Characteristics of Steel Pipe Pile of Platform of Bridge Construction in Water

Solving methods for dynamic characteristics of steel pipe pile of platform are introduced.Vortex induced vibration is produced between water and steel pipe pile during flood period;therefore,it is needed to analyze the dynamic characteristics of the steel pipe pile itself,i.e.to confirm the natural frequency of the steel pipe pile.The resolution for dynamic characteristics is the resolution for modal.Based on the discussion of principles and methods for modal resolution in detail,modal resolution of steel pipe pile of bridge platform is analyzed and the effect of different physical parameters on the natural frequency of the structure is discussed.The results show that the natural frequency of steel pipe pile is inverse proportion to the length of itself,pile outer diameter and the pipe thickness.