西北水电Issue(5)：104-110,7.DOI:10.3969/j.issn.1006-2610.2025.05.017
基于三维有限元的羊曲水电站蜗壳结构静力特性研究
Study on Static Characteristics of Spiral Case Structure of Yangqu Hydropower Station Based on 3D Finite Element Method
摘要
Abstract
To control cracks in the concrete structure surrounding the spiral case and ensure the long-term safe and stable operation of the spiral case structure of Yangqu Hydropower Station,this paper adopts ANSYS simulation technology to establish a 3D nonlinear finite ele-ment model of the spiral case structure for static calculation.The study focuses on the influence of laying a cushion layer in the straight pipe section of the spiral case or increasing reinforcement on the structural characteristics.Through comparative analysis of spiral case stress,reinforcement stress,concrete cracks,seat ring shear force,and thrust ring stress,a scheme more conducive to controlling cracks in the surrounding concrete is proposed.The results show that:If no cushion layer is laid in the straight pipe section of the spiral case and only reinforcement is increased,it is difficult to reduce the hoop reinforcement tensile stress and control the crack width.Laying a cushion layer in the straight pipe section can significantly reduce the hoop reinforcement tensile stress and reduce or even avoid concrete cracking without the need to increase reinforcement;even if no cushion layer is laid within the range of the thrust ring,good results can still be a-chieved.After laying the cushion layer in the straight pipe section,the shear force between the seat ring annular plate and concrete and the equivalent stress of the thrust ring increase slightly,but the impact is minimal.The research results can provide a reference for crack control of the concrete surrounding the spiral case of Yangqu Hydropower Station.关键词
蜗壳结构/三维非线性有限元/静力计算/混凝土裂缝/钢筋应力Key words
Spiral case structure/3D nonlinear finite element/Static calculation/Concrete crack/Reinforcement stress分类
水利科学引用本文复制引用
孙小沛,张峰华,吕东海,刘周歧,张宏战,陈雪桃..基于三维有限元的羊曲水电站蜗壳结构静力特性研究[J].西北水电,2025,(5):104-110,7.基金项目
国家自然科学基金项目(42177158,11902249) （42177158,11902249）
