利用自适应有限元研究高拱坝的应力控制标准  

Study on stress control standards of high arch dam with self-adaptive finite element method

作　　者：杨令强[1] 马静[2] 陈祖坪[3] 

机构地区：[1]济南大学土建学院,山东济南250022 [2]济南大学控制学院,山东济南250022 [3]首钢工学院,北京100041

出　　处：《水利水电技术》2008年第4期53-55,共3页Water Resources and Hydropower Engineering

基　　金：国家自然科学基金资助项目(59778002)

摘　　要：利用自适应有限元分别对国内的3座高拱坝从径向、拱向、径向和拱向同时进行了细分,以研究高拱坝的应力状态、等效应力与等参单元的大小和形状之间的关系。结果显示,拱向细分对应力状态和等效应力影响不大,径向细分单元的精度不能满足要求,对于高拱坝沿径向分为5层基本能够满足设计需要,等参单元的精度可以根据误差估计进行控制,控制的范围建议在10%～15%之间。研究表明300 m级的高拱坝安全控制关键在于等效压应力的控制。For the study on the relationship between the stress state and equivalent stress of high arch dam and the relevant size and form of the isoparametric elements, the bodies of three high arch dams existed in China are simultaneously fractionized in radial direction, arch direction and radial direction with arch direction by the self-adaptive finite element method, h is obtained that （ 1 ） the fractionization in arch direction has less effect on both the stress state and the equivalent stress; （2） the precision of the elements fractionized in radial direction can not meet the requirement concerned ; （ 3 ） the design requirement can be basically met by fractionizing the arch dam into five layers along the radial direction; （4）the precision of the isoparametric element can be controlled with the estimation of the error concerned and the suggested control range is between 10% - 15%. The study shows that the control of the equivalent stress is the key-link for the control of the safety of 300 m high arch dam.

关 键 词：高拱坝 自适应有限元 等效应力 应力控制 网格尺寸 

分 类 号：TV642.4[水利工程—水利水电工程]