排序方式： 共有9条查询结果，搜索用时 15 毫秒
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基于Pro/ENGINEER开发的材料力学仿真实验系统 总被引：1，自引：0，他引：1
基于Pro/ENGINEER的三维实体造型、装配模拟、机构运动仿真等功能开发了材料力学仿真实验系统,使抽象、复杂的教学内容变得生动、形象、直观,提高了实验教学效果。 相似文献
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应用线弹性微结构理论和黏弹性理论,讨论了带孔隙损伤的黏弹性材料压力容器问题.所得的解是准静态的.应力的解和线弹性的压力容器的应力解相同,位移场和损伤场与带孔隙损伤的线弹性材料压力容器问题的位移场和损伤场相似. 相似文献
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Dynamical Behavior of Nonlinear Viscoelastic Timoshenko Beams with Damage on a Viscoelastic Foundation 总被引：2，自引：0，他引：2
Based on convolution-type constitutive equations for linear viscoelastic materials with damage and the hypotheses of Timoshenko beams with large deflections, the nonlinear equations governing dynamical behavior of Timoshenko beams with damage on viscoelastic foundation were firstly derived. By using the Galerkin method in spatial domain, the nonlinear integro-partial differential equations were transformed into a set of integro-ordinary differential equations. The numerical methods in nonlinear dynamical systems, such as the phase-trajectory diagram, Poincare section and bifurcation figure, were used to solve the simplified systems of equations. It could be seen that simplified dynamical systems possess the plenty of nonlinear dynamical properties. The influence of load and material parameters on the dynamic behavior of nonlinear system were investigated in detail. 相似文献
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系统地给出了曲线坐标系中的基矢及基矢的空间变化率,应用Christoffel符号的定义分析了圆柱坐标系和球坐标系的Christoffel符号计算.比较了完整坐标系下和非完整坐标系下Christoffel符号计算公式. 相似文献
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有限板宽孔边应力集中的非线性有限元分析 总被引：1，自引：0，他引：1
对有限板宽孔边应力集中问题进行非线性有限元分析,分析结果表明,孔边应力集中系数不仅与板宽、孔径大小有关,而且还与材料的性质、所处的状态也有关. 相似文献
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Based on convolution-type constitutive equations for linear viscoelastic materials with damage and the hypotheses of Timoshenko beams with large deflections, the nonlinear equations governing dynamical behavior of Timoshenko beams with damage on viscoelastic foundation were firstly derived. By using the Galerkin method in spatial domain, the nonlinear integro-partial differential equations were transformed into a set of integro-ordinary differential equations. The numerical methods in nonlinear dynamical systems, such as the phase-trajectory diagram, Poincare section and bifurcation figure, were used to solve the simplified systems of equations. It could be seen that simplified dynamical systems possess the plenty of nonlinear dynamical properties. The influence of load and material parameters on the dynamic behavior of nonlinear system were investigated in detail. 相似文献
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自动化立体仓库中库位优化模型研究 总被引：7，自引：0，他引：7
在研究现有自动化立体仓库存储模式的基础上，提出库位优化的思想。根据货物存放最低能量原则，建立了库位优化的数学模型。按该库位优化模型存储货物，不仅节省物资出入库过程的能量消耗，降低立体仓库的运行成本，而且提高物资出入库的节奏。 相似文献
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从损伤的粘弹性材料的卷积型本构关系出发,建立了在小变形下损伤粘弹性梁-柱的控制方程,提出了以卷积形式表示的损伤粘弹性梁-柱弯曲问题的泛函,并给出了损伤粘弹性梁-柱的广义变分原理.应用这个广义变分原理,可分别给出梁-柱位移和损伤满足的基本方程,以及相应的初始条件和边界条件. 相似文献
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对弹塑性大变形，由于外界栽荷的作用和材料自身性能的影响，损伤常常表现为各向异性。通过有效应力的概念，损伤对变形的影响可用一个四阶损伤影响张量来表示。对于弹塑性损伤变形，可以通过不同的极分解途径，而得到各种定义的变形梯度张量和相应的应变张量。分析结果表明：变形与材料的损伤有着较为密切的关系。 相似文献
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