平面体系 meaning in Chinese

plane of system
plane system
two-dimensional system

In this paper , ansys , the software on finite element analysis , is made use of processing the static and modal analysis on the preliminary models and its " modified ones . by analyzing the results , we can conclude that the stresses on the components of the modified models are tended to equilibration and the location of the branches " brace can also influence stresses and translations on the branches . in addition , the values of the intrinsic frequencies on modified models " are larger than the ones on preliminary models , but the ranges of the frequencies on both models are almost same
传统的弧形闸门的支臂结构基本上都是三角架式的，这主要是因为按平面体系进行计算的传统设计方法忽略了结构的整体性及弧形闸门的空间结构特点，设计得比较保守，而实际上，将其改为a型结构也存在可行性，本文是利用有限元分析软件? ? ansys对原模型及修改模型分别进行静态和固有频率的计算，通过分析比较其结果可知，支臂改为a型后会使闸门的整体受力趋于均匀，即原模型受力大的部件其应力变小，而原模型受力小的部件其应力会变大；而且a型支臂的支杆在不同的放置位置对支臂的应力和位移变化也有一定的影响。