深水圆形高墩结构振动特性和动力响应分析方法对比研究

杨坤, 葛书勋

结构工程师 ›› 2022, Vol. 38 ›› Issue (6) : 75-83.

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PDF(1788 KB)
结构工程师 ›› 2022, Vol. 38 ›› Issue (6) : 75-83.
抗震与抗风

深水圆形高墩结构振动特性和动力响应分析方法对比研究

  • 杨坤, 葛书勋*
作者信息 +

Comparative Study on Vibration Characteristics and Dynamic Response Analysis Methods of Deep Water Circular High Pier Structure

  • YANG Kun, GE Shuxun*
Author information +
文章历史 +

摘要

墩身动水附加质量对深水高墩结构的振动特性与地震动力响应影响较大,为研究动水附加质量计算方法的适用范围,利用有限元分析软件ADINA,分别基于势流体单元的流固耦合完全数值法以及基于Morison方程的动水附加质量法建立了深水圆形高墩结构的动力分析模型,通过对比分析两类模型的振动特性和地震响应,探讨动水附加质量模型的准确性及其适用范围。研究结果表明,水深宽度比对动水附加质量模型计算的深水高墩结构振动特性和地震响应的精度有明显影响,合理控制水深宽度比可以保证动水附加质量模型的精度。

Abstract

The hydrodynamic added mass of the pier body has a great influence on the vibration characteristics and seismic dynamic response of high pier structures in deep water. To study the application scope of the hydrodynamic added mass calculation methods, a dynamic analysis model of circular high pier structure in deep water is established by using the finite element software ADINA, which is based on the fluid-solid coupling full numerical method of potential fluid element and the hydrodynamic added mass method based on Morison equation.By comparing and analyzing the vibration characteristics and seismic response of these two models, the accuracy and application scope of the hydrodynamic added mass model are discussed. The results show that the ratio of depth to width has a significant influence on the accuracy of vibration characteristics and seismic response of high pier structure in deep water calculated by the hydrodynamic added mass model, and reasonable control of the ratio of depth to width can ensure the accuracy of the hydrodynamic added mass model.

关键词

流固耦合 / 对比分析 / 深水高墩 / Morison方程 / 势流体

Key words

Fluid-solid coupling / comparative analysis / deep water high pier / Morison equation / potential fluid

引用本文

导出引用
杨坤, 葛书勋. 深水圆形高墩结构振动特性和动力响应分析方法对比研究. 结构工程师. 2022, 38(6): 75-83
YANG Kun, GE Shuxun. Comparative Study on Vibration Characteristics and Dynamic Response Analysis Methods of Deep Water Circular High Pier Structure. STRUCTURAL ENGINEERS. 2022, 38(6): 75-83

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