【摘要】 以广东某水坝为研究对象,给出一种基于Fluent平台和Ansys平台进行结构动力响应分析的方法。首先采用基于YOUNGS界面重构技术的VOF模型,对流动进行数值模拟,成功捕捉了闸门开启过程中自由面的变化,比较了在三种落差情况下水坝的受力差异。计算表明,即使在上游平稳的入流条件下,水坝所受到的湍流水压力也会出现波动现象,水压力对坝体的冲击为低频作用,下游水位的升高会减缓水压力的波动,这些特点都与现场观察的相符。然后将水动力作为激励条件导入结构动力分析平台Ansys后,进一步对坝体结构进行动力分析。结构的模态分析结果与实测结果一致。因此,方法可以应用于实际。更多还原

【Abstract】 A method for dynamic response of dam to river flow is proposed with FLUENT and ANSYS software.To simulate the water surface,the VOF model is chosen,three cases of different waterfalls are taken to investigate the dynamic loads to the dam.It can be found that even for steady incident flow,the pressure on the dam surface wavy due to the turbulence,the lower frequency pressure tends to steady as the downstream elevation rises.Then the data are input into ANSYS platform as exciting force,and the numerical results of dam modal analysis coincide with the experimental ones very well.更多还原