摘要
黄河海勃湾水利枢纽河床电站孔洞较多,结构复杂,采用平面有限元分析难以真实反映结构的实际受力状态。通过空间整体有限元方法,分析计算了电站在正常运行工况下的应力情况,结果表明:电站进口初始断面的拉应力和尾水管末端拉应力值较大;流道顶部、底部以及排沙孔的顶部、底部存在一定范围的拉应力区,最大应力达到了1.78 MPa,流道及排沙孔的边角点处有应力集中现象;在位于两侧坝缝处坝段外表面也存在一定范围的拉应力区,拉应力不是很大。电站体形结构设计合理。
There were many complicated holes at the run-of-river station of Haibowan Water Control Project. It was hard to reflect the actual stress with plane finite element analysis. Therefore, space integral finite element analysis was used to analyze the stress in normal operation case. The re- suits show that the tension stress at the initial section of power intake and end of draft tube is large. There is a small range of tension stress region on the top and bottom of flow passage and sand sluice, with the maximum value of 1.78 MPa, and stress concentrates at the corner. There is also a small range of tension stress region on the external surface of monolith on both sides of dam joints, but with a little tension stress value. The geo- metrical structure design is reasonable.
出处
《人民黄河》
CAS
北大核心
2012年第12期120-122,共3页
Yellow River
关键词
应力
整体有限元
河床式电站
海勃湾水利枢纽
stress
integral finite element
run-of-river power station
Haibowan Water Control Project
