为保证重要部位的计算精度，对模型的不同区域采用不同的网格划分策略，以便

为保证重要部位的计算精度，对模型的不同区域采用不同的网格划分策略，以便在有限的计算资源条件下以尽量少的计算用时获得足够精确的计算结果。壳体、支柱盖板、U形柱、连接板及连接板位置以下少部分立柱，是主要的分析区域，部件链接区域是主要的应力集中区，采用实体单元进行网格划分，下支柱采用壳单元进行网格划分，栏杆采用一维线体单元进行网格划分，并设置属性为只受拉不受压，单元只有拉伸刚度，受压时刚度为0，线单元与实体单元之间及壳单元与实体单元之间采用MPC（多点约束与装配）连接，时程分析中为保证计算结果的收敛性，采用弹簧代替拉杆，其承载特性的设置与线单元相同。

为保证重要部位的计算精度，对模型的不同区域采用不同的网格划分策略，以便在有限的计算资源条件下以尽量少的计算用时获得足够精确的计算结果。 壳体、支柱盖板、U形柱、连接板及连接板位置以下少部分立柱，是主要的分析区域，部件链接区域是主要的应力集中区，采用实体单元进行网格划分，下支柱采用壳单元进行网格划分，栏杆采用一维线体单元进行网格划分， 并设置属性为只受拉不受压，单元只有拉伸刚度，受压时刚度为0，线单元与实体单元之间及壳单元与实体单元之间采用MPC（多点约束与装配）连接，时程分析中为保证计算结果的收敛性，采用弹簧代替拉杆，其承载特性的设置与线单元相同。

In order to ensure the calculation accuracy of important parts, different meshing strategies are adopted for different regions of the model, so as to obtain enough accurate calculation results with as little calculation time as possible under the condition of limited computing resources. A small number of columns below the positions of shell, pillar cover plate, U-shaped column, connecting plate and connecting plate are the main analysis areas, and the connecting area of components is the main stress concentration area. Solid elements are used for grid division, shell elements are used for grid division for the lower pillar, and one-dimensional line body elements are used for grid division for railings, and the attributes are set as tension only and compression free, and tension only for elements In the time history analysis, in order to ensure the convergence of the calculation results, the spring is used instead of the pull rod, and the setting of the bearing characteristics is the same as that of the line element.<br>