非线性双渐进法应用于水中结构瞬态运动的研究

姚熊亮;孙士丽;陈玉;张阿漫

振动与冲击 ›› 2010, Vol. 29 ›› Issue (10) : 9-15.

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振动与冲击 ›› 2010, Vol. 29 ›› Issue (10) : 9-15.
论文

非线性双渐进法应用于水中结构瞬态运动的研究

  • 姚熊亮; 孙士丽; 陈玉; 张阿漫
作者信息 +

The Research on transient motions of submerged structures by using Nolinear fluid-structure interaction method

  • Xiongliang Yao; Shili Sun; yu Chen; A-man Zhang
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文章历史 +

摘要




[摘要] 为了解决线性双渐近法只能用于解决准静态条件下的流固耦合问题的局限性,提出了解决流固耦合问题的非线性双渐进法。并将其应用于瞬态载荷作用下具有初始航速结构的流固耦合计算当中。研究了水平初速度系数下流场的动压力时历曲线,分析非线性对结构运动前期、中期、后期周围流场动压力的影响,分析无量纲单位面积冲量随水平初速度系数的变化趋势。给出了非线性效应不能被忽略的初始速度条件,进而研究本了非线性双渐近法的适用范围。

Abstract

[Abstract] For the purpose to overcome the big limit of DAA that is only being applicable to semi-static fluid-structure interaction problem, nonlinear Doubly asymptotic approximation method is propsed. The method is applied to the computation of transient FSI problem of a moving submerged body. The pressure-time curves are analyzed at different horizontal initial velocity coefficient, and the effects of nonlinearity to the fluid pressure at earlier, intermediate and later times is studied. The change of nondimentional unit-area impulse is invegated along with the horizontal initial velocity coefficient.Finally, the initial velociy condition where nonlinear effect is unneglectable is given, further to give the applicability of the NDAA.

关键词

双渐近法 / 流固耦合 / 非线性 / 初始航速 / 单位面积冲量

Key words

Doubly Asymptotic Approximations / Fluid-structure Interaction / Nonlinear / Initial velocity / Unit-area impulse

引用本文

导出引用
姚熊亮;孙士丽;陈玉;张阿漫. 非线性双渐进法应用于水中结构瞬态运动的研究[J]. 振动与冲击, 2010, 29(10): 9-15
Xiongliang Yao;Shili Sun;yu Chen;A-man Zhang. The Research on transient motions of submerged structures by using Nolinear fluid-structure interaction method[J]. Journal of Vibration and Shock, 2010, 29(10): 9-15

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