Basing on the feature of the structure member , the structure is simplified to a 3 - d model consist of space beams and shells , so we can make response spectrum dynamic analysis on the finite - element models . at last nonlinear finite element dynamic analysis was made about the structures . the calculated results reveal the rule of dynamic response about model the and show that the aseismic behaviour and failure mechanism of shear wall structure with src supporting frames and src girder transfer floor is better than that of rc one 在7度多遇和罕遇地震力作用下,通过对振型、侧向位移、倾覆力矩和剪力在给定抗侧力结构间分配的比较,以及对框支柱和剪力墙的地震响应、转换层楼板应力比较等模拟分析,得到型钢混凝土梁式转换层框支剪力墙结构较钢筋混凝土梁式转换层框支剪力墙结构抗地震力特性上有较明显的改善的结论。
Also , 40m - length fore - and - aft antique city walls will be utilized to establish the 3d elastic finite - element model . in this case , a reasonable construction technique will be attained as the impact of tunnel construction on terrestrial sedimentation of antique city - wall sectors as well as the stability of mid - 以及取古城墙前后40m的长度范围,建立三维弹塑性有限元模型,考虑隧道施工对古城墙段的地表沉降的影响以及中隔墙在时空上的稳定性,得出较为合理的施工方式。
In this paper the different middle wall ' s mechanical behavior on different rock mass has been simulated by establishing the three - dimensional finite - element model of the shallow double - linked - arch tunnel , and the basic loading law of the middle wall is obtained , then the proper form of middle wall under different rock mass during constructing the shallow double - linked - arch tunnel is given , which offers foundation for the design of middle wall in double - linked - arch tunnel 通过建立双连拱隧道的三维有限元模型,模拟了不同围岩级别条件下浅埋双连拱隧道不同中墙形式的力学行为,得出了中墙的基本受力规律,提出了不同围岩级别条件下修建浅埋双连拱隧道所采用的合理中墙形式,为双连拱隧道的中墙设计提供依据。
( 4 ) the transient field - circuit model of large generator and the network model of power station are all studied . moreover , the coupling finite - element model with fast computational speed and high accuracy is found , which is very suitable for the on - line insulation safety forecast diagnosis of large generators . ( 5 ) the ( 5 )结合场路综合模型的分析计算,建立了大型发电机绝缘安全的评估模型,并对在厂站操作过电压冲击下的大型发电机绝缘安全的在线评估方法进行了研究。
Thus , two 2d elastic finite - element models of tunnel are respectively established , both of which go through i wall - rock sector and wall - rock sector by means of large - scale finite element software ansys . thereby , the magnitude of wall stress , displacement , submergence of arch roof and terrestrial sedimentation in tunnels will be attained via numerical simulation of the whole construction process 通过运用大型通用有限元软件ansys ,分别建立隧道穿越类围岩地段和类围岩地段的两个二维弹塑性有限元模型,进行施工全过程的数值模拟,得到隧道中墙应力和位移以及拱顶下沉和地表沉降值。
Studies of the sensitiveness of the damage - indicators showed that the success of damage identification procedures depends much on the type of indicator employed for diagnostics . finally , a generalization of the procedure based on floating - point - coding genetic algorithms associated with finite - element models , which makes possible the tackling possible complex structural cases , is developed and illustrated 本文考察了几种不同标识量对结构局部损伤的反映灵敏程度,通过分析比较可以看出:在结构损伤检测问题中,损伤标识量的选择是否合适,对整个问题求解的成败起着十分关键的作用。