摘要
该文依托巴基斯坦塔贝拉水电站5号隧洞二期扩建工程,选取大型空间弯管与支管交叉段,开展空间弯管的应力应变特性研究。空间弯管直径13 m,呈扭曲状,交叉段结构复杂,在自重和约束的共同作用下,极易产生局部较大的应力和应变,从而引起结构失效,危及工程安全。为进一步探究大型空间弯管的应力应变特性,基于Rhino三维建模软件和ANSYS有限元分析软件,构建大型空间弯管和岔管的三维有限元模型,分析复杂结构在自重作用下的应力应变分布规律,根据空间弯管的材料强度指标评价结构的安全性。研究结果表明,弯管在自重作用下产生的应力应变处于较低水平,远低于材料允许强度值,验证工程设计的合理性。
Based on the second-phase expansion project of Tunnel 5 of Tabella Hydropower Station in Pakistan,this paper selects the intersection section of large spatial bends and branch pipes to carry out a study on the stress-strain characteristics of spatial bends.The spatial bend has a diameter of 13 meters and is twisted.The intersection section has a complex structure.Under the combined action of self-weight and constraints,local large stress and strain can easily be generated,causing structural failure and endangering project safety.In order to further investigate the stress-strain characteristics of large-scale spatial bends,three-dimensional(3D)finite element models of large-scale spatial bends and bifurcated pipes are constructed based on Rhino three-dimensional modeling software and ANSYS finite element analysis software.The stress-strain distribution rule of complex structures under self-weight is analyzed,and the safety of the structure is evaluated based on the material strength indicators of spatial bends.The research results show that the stress and strain generated by the elbow under the action of self-weight are at a low level,far lower than the allowable strength value of the material,which verifies the rationality of the engineering design.
出处
《科技创新与应用》
2025年第35期87-90,共4页
Technology Innovation and Application
关键词
ANSYS
空间弯管
应力应变
分布规律
水利水电工程
ANSYS
spatial elbow
stress and strain
distribution law
water conservancy and hydropower engineering
