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1)  double layer torsional reticulated shell
双层扭网壳
1.
In this paper artificial neural networks are used for design of large span double layer torsional reticulated shell.
应用误差反向传播的人工神经网络技术对大跨度双层扭网壳进行设计,双层扭网壳的跨度在50~80 m之间变化,训练了估算双层扭网壳的最大挠度、重量和杆单元横截面面积的神经网络。
2)  Double-layer reticulated shell
双层网壳
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3)  double layer hyperboloid latticed flat shell
双层双曲扁网壳
1.
In this paper,double layer hyperboloid latticed flat shells free vibration differential equation are founded according to the method of simulated shell,and then,its frequeney and amplitude are derived.
建立双层双曲扁网壳的拟壳法自由振动微分程方程，求解其自振频率与振型，编制计算程序，并通过实例计算与有限元法进行比较。
4)  hyperbolic paraboloid shell
双曲扭壳
5)  torsional reticulated shell
扭网壳
1.
In this paper, the nonlinear FEM is used to analyze the general stability of torsional shell and torsional reticulated shell with original imperfections.
本文应用非线性有限元法，对考虑初始缺陷的扭壳、扭网壳进行整体稳定分析，获得了临界状 态时的失稳模态和临界荷载。
6)  arch-supported double-layer reticulated shell
拱支双层网壳
1.
Based on the structural features of double-layer reticulated shells and prestressed arch structures,prestressed arch-supported double-layer reticulated shell structures have been developed as a new large space structural system.
预应力拱支双层网壳结构体系是在综合双层网壳和预应力拱结构等优点的基础上,构思出的一种新型大跨空间结构形式。
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补充资料：双层θ网环
分子式：
CAS号：

性质：一种高效实验室散装填料。用双层金属丝网制成的θ网环。其结构、特点与θ网环相同，但由于用双层丝网制成，因而增加了机械强度。

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