基于ANSYS的拱坝模态分析
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摘要
建立了长岭水库拱坝有限元模型,并根据Westergaard公式编制程序在迎水面面板上施加流固耦合引起的"附加质量."在模态分析中,计算了拱坝加固前后的自振频率,讨论了"附加质量"对拱坝自振特性的影响,为拱坝除险加固设计提供了参考依据.计算结果表明,结构加固后,显著提高了拱坝的抗震性能.
The free vibration characteristics of Changling arch dam are studied by three-dimensional finite element analysis.According to Westergaard expressions,the additional mass due to fluid-structure coupling motion is taken into account.The free vibration frequencies of the Changling arch dam before and after structure reinforcement are calculated.The influences of additional mass on the arch dam are discussed so as to provide scientific basis for the structure reinforcement of the arch dam.The study shows that after structure reinforcement,it is improved significantly of arch dam anti-seismic performance.
The free vibration characteristics of Changling arch dam are studied by three-dimensional finite element analysis.According to Westergaard expressions,the additional mass due to fluid-structure coupling motion is taken into account.The free vibration frequencies of the Changling arch dam before and after structure reinforcement are calculated.The influences of additional mass on the arch dam are discussed so as to provide scientific basis for the structure reinforcement of the arch dam.The study shows that after structure reinforcement,it is improved significantly of arch dam anti-seismic performance.
引文
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[3]汪军,赵金广.大型结构有限元仿真建模及模态分析探究[J].山西建筑,2010,36(4):80-81.
[4]杨吉新,张可.基于ANSYS的流固耦合动力分析方法[J].船海工程,2008,37(6):86-89.
[5]孙林松,朱瑞晨.白鹤滩拱坝三维有限元分析[J].水电能源科学,2005,23(6):39-41.
[2]党国强.拱坝-库水-地基系统地震反应分析研究[D].西安:西安理工大学,2008.
[3]汪军,赵金广.大型结构有限元仿真建模及模态分析探究[J].山西建筑,2010,36(4):80-81.
[4]杨吉新,张可.基于ANSYS的流固耦合动力分析方法[J].船海工程,2008,37(6):86-89.
[5]孙林松,朱瑞晨.白鹤滩拱坝三维有限元分析[J].水电能源科学,2005,23(6):39-41.
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