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水中悬浮隧道锚索横向动力特性分析

, PP. 73-78

Keywords: 隧道工程,悬浮隧道,锚索,均匀流,非线性

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Abstract:

考虑流体-结构偶联效应和悬浮隧道锚索的几何非线性特点,建立了悬浮隧道锚索非线性振动方程,并通过ANSYS有限元软件的二次编程,在时域内实现了方程求解,分析了悬浮隧道锚索在非线性横向升力作用下的动力特性。计算结果表明锚索的轴力和锚索中部的最大位移都随锚索的预张力增加而显著下降;在非涡激振动的情况下,随均匀流速度的增加,锚索中部的最大位移有所增加,但是在涡激共振的情况下,锚索中部位移有跳跃性增加;随着锚索长度的增加,锚索中部的最大位移变小,轴力随之增加;锚索的倾斜角度对锚索的轴力和位移的影响基本一致,随角度的增加,轴力和位移均先减小,后增加。

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