滑坡涌浪作用下弧形闸门动力响应数值分析
Numerical Analysis of Dynamic Response of Radial Gate Under Action of Landslide Surge
王鲁 1李斌 2易魁 3胡小光 2生永贞 2赵兰浩1
作者信息
- 1. 河海大学水利水电学院,江苏 南京 210098
- 2. 中国电建集团昆明勘测设计研究院有限公司,云南 昆明 650051
- 3. 华能澜沧江水电股份有限公司, 云南 昆明 650214
- 折叠
摘要
库岸滑坡是一种常见的地质灾害,滑坡体入库后诱发的涌浪可能会严重威胁库区内闸门结构稳定性.针对弧形钢闸门在滑坡涌浪作用下的动力响应问题,以某深孔弧形工作闸门为例,通过自编有限元程序模拟滑坡涌浪过程,将计算出的涌浪动水压力转化为闸门的节点荷载,基于动力时程法得到闸门动力响应,并结合闸门静力计算结果进行对比分析.结果表明,在滑坡涌浪作用下,主梁后翼缘和竖梁后翼缘的应力响应最大,闸门各个构件中支臂的位移响应最大;相比于正常蓄水位时的滑坡涌浪,死水位时的滑坡涌浪对闸门结构应力和位移响应的影响更大.
Abstract
Reservoir landslide is a common geological hazard,and the surge induced by slide body after entering the reservoir may seriously threaten the stability of the gate structure.Aiming at the dynamic response of steel radial gate un-der the action of landslide surge,taking a deep-hole radial service gate as an example,the landslide surge process was simulated through the self-made finite element program.The calculated hydrodynamic pressure of the landslide surge was converted into the node load of the gate,and the dynamic response of the gate was obtained based on the dynamic time-history analysis method.Combined with the static calculation results of the gate,a comparative analysis was carried out.The results show that under the action of landslide surge,the stress response of the rear flange of the main beam and the vertical beam are the largest,and the displacement response of the supporting arm is the largest among the components of the gate.Compared with the landslide surge at the normal water level,the landslide surge at the dead water level has a greater impact on the displacement and stress responses of the gate structure.
关键词
滑坡涌浪/弧形闸门/动力响应/动水压力/动力时程法Key words
landslide surge/radial gate/dynamic response/hydrodynamic pressure/dynamic time-history analysis method引用本文复制引用
基金项目
国家重点研发计划(2022YFC3005402)
华能集团科技项目(HNKJ22-H107)
出版年
2024
NETL
NSTL
维普
万方数据