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truss structures
相关语句
  桁架结构
     Random Earthquake Response Analysis of Truss Structures
     桁架结构随机地震响应分析
短句来源
     Failure Analysis in Redundant Truss Structures
     冗余桁架结构的故障分析
短句来源
     Topology Optimization Design for Truss Structures
     桁架结构的拓扑优化设计
短句来源
     A Hybrid Algorithm for Topology Optimization of Truss Structures with Discrete Variables
     离散变量桁架结构拓扑优化的杂交算法
短句来源
     Structural optimization design of random truss structures based on system reliability
     基于体系可靠性的随机桁架结构优化设计
短句来源
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  桁架
     Design and Analysis of a Specimen of Steel Composite Staggered Truss Structures
     多层混合式交错桁架钢结构体系循环加载试验试件设计及分析
短句来源
     Experimental and Simulation Study of Vibration Control of Adaptive Truss Structures
     桁架自适应结构振动控制仿真实验研究
短句来源
     Experimental Simulation Study of Vibration Control of Adaptive Truss Structures
     桁架自适应结构振动控制仿真实验研究
短句来源
     Mech Electric Coupling Dynamic Analysis and Vibration Control of Intelligent Truss Structures
     智能桁架机电耦合动力分析与振动控制
短句来源
     IMPROVED GENETIC ALGORITHM FOR SHAPE OPTIMIZATION OF TRUSS STRUCTURES
     改进的遗传算法求解桁架的形状优化
短句来源
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  桁结构
     STUDY ON STATIC ANALYSIS AND DYNAMIC CHARACTERISTICS OF CABLE TRUSS STRUCTURES
     索—桁结构的静力分析及动力特性研究
短句来源
     Theoritical and Experimental Research on the Large-Span Annular Open-Web Cable Truss Structures
     大跨度环形空腹索桁结构体系的理论和实验研究
短句来源
     The geometric nonlinear analysis of three types of large-span annular cable truss structures is put forward by using commercial FEM program. Their static properties in deferent load case are concluded, and some suggestions for actual projects are also presented.
     本文利用通用有限元软件ANSYS对大跨度环形空腹索桁结构体系中三种典型的结构(即内外圈都为圆形、外圈圆形内圈椭圆形、内外圈都为椭圆形的三种外形的结构)进行了几何非线性分析,总结出各自在不同荷载工况下的静力性能,并提出一些有实际工程意义的建议。
短句来源
     Shape-finding of large-span annular cable truss structures
     大跨度环形索桁结构体系的找形
短句来源
     Recently, tubular truss structures are used extensively in the large-span space structures.
     近年来,管桁结构在大跨空间结构中得到广泛应用。
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  “truss structures”译为未确定词的双语例句
     Selection of 750 kV Substation Truss Structures
     750kV变电构架结构选型
短句来源
     The Optimal Design and Ultimate Analysis of Truss Structures
     网架结构的优化设计及极限分析
短句来源
     DYNAMIC RELIABILITY ANALYSIS OF STOCHASTIC TRUSS STRUCTURES UNDER STATIONARY RANDOM EXCITATION
     平稳随机激励下随机机架结构动力可靠性分析
短句来源
     A finite element method for nonlinear dynamic analysis of beam/truss structures in construction machinery
     工程机械梁杆系统动力非线性分析的有限元方法
短句来源
     FAILURE THEORY AND RELIABILITY ANALYSIS OF TRUSS STRUCTURES CONSIDERING STATIC STRENGTH AND FATIGUE
     杆系结构静强度和疲劳失效机理及可靠性分析
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  truss structures
A modified version of Joines and Houck's [18] penalty function method is introduced and studied with respect to discrete optimization of truss structures.
      
Several numerical examples of maximum stiffness design of truss structures are presented.
      
Determination of the natural frequencies of longitudinal and torsional vibrations of truss structures with apparent additional m
      
In this work, a nonlinear path-following method is given for analysing the nonlinearstability problems of space truss structures.
      
The analytical model based on equivalent truss structures, allows one to determine the bearing capacity of corbels, distinguishing the different ultimate states reached.
      
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(1) A new method for optimal design of trusses is presented. The trusses are subjected to multiple loading conditions and behavioral constrairts on node displacements, element stresses and member sizes. This method is bases on the Kuhn-Tucker conditions, in which the active constra'nt gradients are expressed through Taylor series expansion In terms of design variables So that a new design point A, at which the Kuhn-Tucker conditions would be satisfied, can be obtained directly. Because of the approximation...

(1) A new method for optimal design of trusses is presented. The trusses are subjected to multiple loading conditions and behavioral constrairts on node displacements, element stresses and member sizes. This method is bases on the Kuhn-Tucker conditions, in which the active constra'nt gradients are expressed through Taylor series expansion In terms of design variables So that a new design point A, at which the Kuhn-Tucker conditions would be satisfied, can be obtained directly. Because of the approximation of Taylor series expansion, the iterative steps in design procedure are necessary.(2) On the basis of the prnciple of v rtual force method and the concepts of generalized forces and displacements, the related tasks of computing the first and second derivatives of structural node displacements and sfresses with respect todesign variables are also solved. The forms of the formulas of ccmputingderivatives are very simple for calculate and are also suited to use in optimality criteria approaches.(3) A typical three-bar truss structure has been optimized to illestraie the application of this method.

(1)本文提出一种桁架优化设计的新方法。桁架可承受多种载荷情况并具有节点位移约束,元件应力和几何尺寸约束。此方法以Kuhn—Tucker条件为理论基础;主动约束梯度用以设计变量组成的Taylor级数来表达,故可直接求得满足Kuhn—Tucker条件的新设计点A。由于Taylor级数展开式的近似性,在设计过程中迭代步骤是必须的。 (2)利用虚力原理和广义力以及广义位移的概念,求解节点位移和元件应力对设计变量的一阶和二阶导数。导数计算公式很简单并适用于准则法。 (3)以一典型的三杆桁架为例说明此方法的应用。结果表明此方法相当有效。

This paper proposes an approach for obtaining minimum weight design subject to multiple constraints of different types (i. e., stress,displacement and side constraints) under multiple load cases. The design point is moved along the boundary of the most critical constraint by using the scaling step and then the single disp1acement criterion step (if the critical constraint is a displace- ment one) or the fully stressed criterion step (if the critical constraint is a stress one), until the optimum solution has...

This paper proposes an approach for obtaining minimum weight design subject to multiple constraints of different types (i. e., stress,displacement and side constraints) under multiple load cases. The design point is moved along the boundary of the most critical constraint by using the scaling step and then the single disp1acement criterion step (if the critical constraint is a displace- ment one) or the fully stressed criterion step (if the critical constraint is a stress one), until the optimum solution has been found. An improved techni- que. for the approximate structural reanalysis and a reduced basis technique for sensitivity analysis are presented in this paper. Numerical examples have shown that these approximate techniques are very useful and efficient in structural optimization. The approach in this paper avoids the difficulties for deciding the active and passive variables and for calculating a large set of Langrange multiplies for the active constraints, and greatly reduces the num- ber of reanalysis of the modified structure. The application of the approach to a number of truss structures has demonstrated the efficiency and accuracy of the approach. The application of this approach can be extended to the structures which consist of the membrance elements.

本文提出了桁架结构在多种荷载工况多种约束类型约束(位移、应力和尺寸约来)条件下最轻重量设计的齿行法.利用射线步把设计点拉到最严约束界面上,然后使用单位移准则步或满应力准则步来确定设计变量修改的方向和步长,直到找到一个满意的最优解为止。另外.本文还提出了修正的摄动法和敏度分析的降维法,应用这些方法于结构优化设计收到相当显著的效果.数字例题表明,这些近似的重分析方法在结构优化设计中是很有效的。 本文的方法可以用于由膜单元组成的多种单元组合结构。

The internal forces in the members of orthogonal space truss structure can be adjusted by elevating or settling its supports. By this way, the maximum internal forces in members of interior truss can be reduced and the internal forces in members of trusses in edge region can be increased, so that the internal forces in members in the same panels of trusses running in the same direction or in both directions can be made nearly equal, thus minimizing the types of joints and members so as...

The internal forces in the members of orthogonal space truss structure can be adjusted by elevating or settling its supports. By this way, the maximum internal forces in members of interior truss can be reduced and the internal forces in members of trusses in edge region can be increased, so that the internal forces in members in the same panels of trusses running in the same direction or in both directions can be made nearly equal, thus minimizing the types of joints and members so as to economize materials as well as to render the structure to be lifted easily and synchronously during construction.The same economical effect can be obtaind when the space truss structure is supported on four corners.Numerical examples are given in this paper.

本文利用支座升降来调整正交交叉平板网架结构的内力,使中部桁架的最大内力降低,边区桁架的内力值升高,使每个方向或两向同部位处构件的内力相等,从而减少节点类型、统一构件、节省材料,在安装过程中容易同步提升。 当交叉结构为四角点支承时,只要将边跨主要支承结构的刚度与跨中次要结构的刚度比值或对应各杆的截面面积比值按各自所承受的荷载的比值取值,在加载过程中,整个结构体系就会自行调整其内力,可获得同样的经济效果。文中附有实例。

 
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