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The effect of the boundary condition in elastic guided-wave system is discussed.

讨论了弹性波导系统的边界状态在整个系统的作用。

The direct methods to solving the boundary condition problems of elastic mechanics are introduced in the present work.

本文的工作提供了直接求解弹性力学边值问题的一个新思路。

The paper studies the application of boundary element method in shape optimization of elastic problems.

应用边界元法的弹性结构灵敏度分析及其形状优化边界元法

A weak form equation containing boundary parameters was given for elastic problems in three-dimension.

本文从弹性力学平衡方程更为一般的弱形式出发，给出了含边界参数的弱形式方程。

According to the Perzyna elastic viscoplastic constitutive relation and the mixed strain hardening models,a consistent tangent operator concept-based implicit boundary element method was presented.

该方法根据Perzyna弹黏塑性本构关系，基于混合硬化模型，采用隐式欧拉计算格式，得出了两种常用流动函数下弹黏塑性的径向返回算法和一致切线算子。

The method is suitable for vibration analysis of the slab simply supported by internal elastic point under other boundary condition.

该方法适用于内部为弹性点支承的其它边界条件的简支板分析。

Comparison of bounding surface model and traditional elastic mechanics model of concrete

模型中采用了基于应变能量释放率空间的边界面模型，通过极限断裂面的不断移动模拟疲劳过程中损伤阈值的不断变化。

Based on a bounding surface model of the concrete and elastic-plasticity constitutive relationship of steel, this paper establishes the finite element model of the self-stressing concrete filled steel tube short column under axial load and eccentric load. the mechanical performances are analyzed.

对本课题组共进行的37根轴压短柱的试验结果分析，采用分解分析的方法，回归出钢管自应力免振混凝土轴压结构核心混凝土的等效单轴本构关系，与传统的弹性、塑性、断裂、损伤等力学模型相比具有简单实用的特点，便于进行工程计算。

Damage function is introduced in elastic and plastic modulus expression of the bounding surface formulation directly; then a bounding surface damage model for structural soft soil is developed; the complication induced by introducing damage parameter into the bounding surface equation is avoided and its numerical implementation is easy for the analysis of earth structures.

在边界面理论的弹塑性模量中直接引入损伤函数，建立结构性软土的边界面损伤模型，避免了在边界面方程中引入损伤变量带来的复杂性，易于在土工数值分析时采用。

Based on the plasto-elastic bounding surface model, the dynamic characters of typical clay and silt were studied through several types of laboratory dynamic tests. The parameters of dynamic bounding surface model were given upon the tests. By using a nonlinear procedure for response analysis of horizontally layered sites subjected to multi-directional earthquake loading, the response of acceleration, pore pressure and dynamic stress in Shanghai area under different earthquakes were studied.

在弹塑性边界面模型的基础上，通过试验，研究了上海地区典型粘土和砂性土的动力特性，取得了针对边界面模型的计算参数，并采用多向地震作用下的水平地层弹塑性动力反应分析程序对以深厚软土覆盖地层为特点的上海地区典型的土层断面，以苏南核电站为主的地震输入进行了场地反应分析，在加速度特性、孔压特性和动应力特性等方面取得了相应的结果。

Through comparing with the results by simulation to study the effects of theprojectile"s final velocity, the angle of rotation and the ballistic trajectory"s migration withdifferent projectile"s rotating speeds, different target"s moving speeds and differentpenetration angles.

通过比较数值模拟的结果来研究不同弹头转速、目标速度、侵彻角对侵彻过程中弹头最终速度、翻转角度和弹道偏移的影响。

I love stationery and all the accoutrement of writing.

我爱文具以及所有的书写的工具装备。