带水平上室型调压井结构三维有限元静动力稳定分析-水利水电工程专业论文.docxVIP

带水平上室型调压井结构三维有限元静动力稳定分析 摘 要 调压井结构的安全稳定关系到整个水电站及引水系统的正常运行，因此确保调压井 的安全是十分必要的。针对调压井结构的静动力稳定分析这一工程课题，在凝炼相关研 究的基础上，通过大型通用软件 ABAQUS 进行了三维有限元静动力分析。主要研究内 容包括以下几个方面： （1）通过有限元软件 ABAQUS 建立调压井结构的三维模型。其主要内容包括模拟 各材料分区——岩体和混凝土结构，离散单元，确立材料属性，定义边界条件和荷载等。 （2）对结构进行地应力平衡，并验证平衡效果，结果表明地应力平衡效果良好。 （3）对布仑口-公格尔水电站调压井结构最高涌水位工况下进行静力分析，研究其 变形及力学特性，评价其稳定性，并对支护措施的改善提出具体的建议。 （4）基于附加质量单元，确定地震荷载作用下的动水压力，通过建立用户单元及 运用 Fortran 语言编写相应的命令，实现动水压力的加载。 （5）选取地震波，并根据相关规范及结构的设计指标，调整选定的地震波。 （6）选取 Rayleigh 阻尼作为结构的阻尼，通过结构自振特性分析提取自振频率， 计算选定阻尼的相关参数。 （7）基于布仑口-公格尔水电站调压井最高涌水位工况下的静力分析，进行结构在 地震荷载作用下的动力响应分析，研究其位移及应力随时程的变化规律，评价结构的安 全性。 关键词：调压井；衬砌；围岩；ABAQUS；有限元法；位移；最大主应力；地震 I II II Static and Dynamic Stability Analysis of the Structure of Surge Tank Based with Horizontal Upper Chamber on Three-Dimension Finite Element Method Abstract The safety and stability of surge tank is related to the operation of hydropower station and water diversion system, therefore it is necessary to ensure the safety of surge tank. To solve the engineering HYPERLINK /dict_result.aspx?searchword=%e8%af%be%e9%a2%98amp;tjType=sentenceamp;styleamp;t=subject subject which is static and dynamic stability analysis of the structure surge tank, based on related research, static and dynamic stability analysis based on three-dimension finite element method was conducted through the large generally used finite element software ABAQUS. The main contents include the following aspects: Three-dimensional model was built by ABAQUS. In the model, surrounding rock and lining were simulated, the material properties of surrounding rock and lining were defined, boundary conditions and loads were determined, and the surrounding rock and lining were divided into finite elements. Balance of crustal stress was made. And the result showed well through proving. Static finite element Analysis of the surge tank of Bulunkou-Konggur hydropower station was conducted in the highest gushing level condition. The stability of the surge tank was evaluated. Some measures were suppo