three-dimensional continuum

In order to overcome the structural singularity problem in the optimization process of a complex three-dimensional continuum structure, an approximate optimal model is introduced, and a three-dimensional structural virtual design method is proposed.

为了解决三维实体结构虚拟设计中结构的奇异性问题，引进了一种结构优化近似模型，并形成了一种三维实体结构虚拟设计方法。

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A model for its static and dynamic analysis of a large deformation spatial beam is developed, based on the virtual work increment equation for three-dimensional continuum, considering effect of shearing and warping deformations.

以三维连续体增量虚功原理为基础，建立了空间大挠度梁考虑剪切影响的静态分析模型和动态特性分析模型；

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ICM-based topological optimization of three-dimensional continuum structure

基于ICM方法三维连续体结构拓扑优化

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There are three approaches in numerical simulation of plate and shell structures: plate and shell theory approach, degenerated continuum approach, direct three-dimensional ( 3D) continuum approach.

对于板壳问题，共有三种数值模拟方案：线性或非线性的板壳理论、退化连续体方案和直接三维连续体方案。

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The stiffness equation for stringent three dimension beam column element was derived using nonlinear continuum mechanics and stability interpolation function considering shear effects, and the coupling effects between axial, flexural and torsional displacements were considered in the equation.

文中基于非线性连续介质力学理论和考虑剪切效应的稳定插值函数建立的严格三维梁柱单元刚度矩阵，包含了轴向、剪切、双向弯曲与扭转及其各耦合效应。

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Multi-item inventory system optimization with decaying products and probabilistic resource constraints; Topology Optimization of Three-dimensional Continuum Structure under Multiple Loading Cases and Constraints

多资源概率约束下多品种变质产品库存优化连续体结构的多工况多约束拓扑优化方法研究

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Modeling soil as a three-dimensional axisymmetric continuum and taking its 3D wave effect into account, longitudinal vibration of pile and its application is systematically investigated.

本文从三维轴对称土体模型出发，在考虑桩周土体三维波动效应情况下，较系统地对桩的纵向振动特性进行了研究。

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This paper builds the general forms of subspace variational principles of rods and shells which are taken as the controlled equations of the constitutive theories developed from the three-dimensional ( non-polar) continuum mechanics.

本文建立了杆、壳的子空间变分原理的一般形式，将它作为杆、壳的本构近似理论中的控制方程。

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A new method for topology optimization of three-dimensional continuum structures based on Bionics

三维连续体结构仿生拓扑优化新方法

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Modelling soil as a three-dimensional axisymmetric continuum and taking its radial and vertical displacement into account, the interaction between a soil layer and an integral end bearing pile undergoing vertical harmonic load is theoretically investigated.

从三维轴对称土体模型出发，同时考虑土体竖向和径向位移，对完整端承桩在垂直谐和激振力作用下与土的耦合纵向振动特性进行了分析。

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Topology Optimization of Three-dimensional Continuum Structure under Multiple Loading Cases and Constraints

连续体结构的多工况多约束拓扑优化方法研究

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A research on the numerical topology optimization technology of large three-dimensional continuum structures considering displacement requirements

考虑位移要求的大型三维连续体结构拓扑优化数值技术研究

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Based on the strain energy equation for the three-dimensional continuum, the finite element formulation for large deflection of three-dimensional beam is developed.

本文从三维连续体的应变能出发，推导了空间大挠度梁的静、动力学有限元方程。

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