海水过滤系统鼓形滤网强度及抗震分析-机械工程专业论文.docxVIP

II II 内 容 摘 要 在机械结构设计 CAE(Computer Aided Engineering)仿真分析阶段，以 ANSYS 软 件为工具进行有限元分析是最常用也是最重要的设计方法之一。本文利用有限元分析 软件 ANSYS Workbench 对核电站鼓形滤网的结构进行了静力分析、模态分析以及地震 反应谱响应的分析研究，为核电站重要滤水设备的性能评价和设计改进提供了科学的 理论依据。 在本文中采用 CAD 软件 UG 建立了鼓形滤网的三维有限元模型，利用 ANSYS Workbench 和 UG 的专用接口将三维模型导入 ANSYS Workbench，并对模型进行了静力 分析、模态分析以及地震反应谱响应的分析。通过静力分析，得知鼓网在压力载荷下 各部件的变形和应力情况，验证结构的安全性，并提出鼓网设计的改进意见。通过对 模型的模态分析，确定了鼓网的各阶频率和振型。对于模态振型的分析得出了各部件 的刚度强弱和弹性形变情况，有效地防止结构的振动所引起的破坏，也避免鼓网产生 共振。在模态分析的基础上，对模型进行地震反应谱分析，得出了鼓网在 X、Y、Z 三个方向上的激励反应谱作用下的位移响应和应力响应，确保滤网设备在地震作用下 的安全。 关键词：有限元 UG ANSYS Workbench 静力分析 模态分析 谱分析 Abstract Abstract III III Finite element analysis by ANSYS software is one of the most common and important methods in the CAE (Computer Aided Engineering) simulation analysis phase of machine structure design. In this paper，finite element analysis including static analysis，modal analysis and seismic response spectrum response analysis is done on the nuclear power plant drum filter structure by ANSYS Workbench，which provides a scientific theoretical basis to the performance evaluation and the design improvement of the nuclear power plant water treatment equipment. In this paper ， a three-dimensional finite element model of the drum filter is established by the CAD software UG，and the model is imported into ANSYS Workbench through the dedicated interface between ANSYS Workbench and UG，then the static analysis，modal analysis and seismic response spectrum response analysis of the model are done.The static analysis shows the drum mesh deformation and stress of the various components under the pressure load，to verify the security of the structure and propose some suggestions about the improvement of the drum mesh design. With the modal analysis of the model，the natural frequencies and mode shapes of the drum mesh is determined. The stiffness’ strength and the elastic deformation of each component are derived from the analysis of the modal shape，which prevents the damage caused by the vibration of the