接触问题

It shows that the frictional contact model of abutment and the arithmetic are reasonable and reliable.

堆石坝岸坡接触问题的提出及所提供的模拟方法，对狭谷地区面板坝设计研究是一项突破。

Firstly establishing mechanical model of casing structure , and then processing casing forces analysis using space finite-element method and superposition method(put structure stress and outer force stress together), it computes the stress of casing in three dimensions, and gets the internal force and transmutation. The structure of casing-coadjutor is computed overlaply and the question of contact is solved. In the aspect of design, it provides the mixed integer-discrete variable optimization method of casing cross section size and coadjutor layout.

本文就上述两个问题的最优化设计展开研究，首先建立了套管结构的力学模型，进行套管的受力分析，用了空间有限元法和叠加法(结构应力和外载应力相叠加)，对套管进行三维计算，确定结构的内力和变形，对套管—扶正器结构进行整体的叠代计算，解决接触问题；在设计方面，提出了解决套管截面尺寸参数和扶正器布局的混合整数—离散变量优化方法。

The computational method and formula of elastic multi-body contact problemwith mult-contact surface by boundary element method were carried out and the correspondingfortran program was eompiled as well.

推导了多弹性体多接触面无摩擦接触问题的边界单元法的计算公式和方法，并编制了相应的FORTRAN程序。

Since the impenetrability condition and the interaction of adjacent contact pairs are all considered in this algorithm, the contact constraint and equilibrium equations of the system are better satisfied as compared with the traditional penalty method.

随着并行算法的发展，在不涉及接触问题的情况下，有限元并行计算已经取得极大成功，大多数工程问题均能够以超过85%的并行效率J决速完成动力学过程模拟和分析。

Two. Solve the problem on the aspect of contact and nonlinear loading compatibly, to make sure that the simulation level of model can be elevated.

二、合理解决在轧制过程中两辊之间的接触问题和轧制区上的非线性加载问题，以提高模型的仿真水平和计算精度。

Finally,a formulation of frictional contact problem in BEM and parametriclinear complementary form is presented.

最后，本文还对用边界元法结合线性互补问题求解摩擦接触问题进行了探讨性的研究。

For the design and analysis to certain problem, theparameter method of 3D contact FEA using Delphi and MSC.

为便于对这一类问题的优化设计与分析，本文提出了三维参数化有限元分析方法，并从球面-平面接触问题入手，在对模型简化及边界条件进行一定假设的基础上，借助编程软件Delphi和有限元分析软件MSC。

Though it is helpful to improve the increasing serous resources and environment problems by propagandistic education and End-of-Pipe Control method, the adjustment by economic means maybe contact the root of the these problems.

教育宣传、末端治理的方式虽然有助于改善日益严重的资源、环境问题，但以经济手段去调整也许更能接触问题的根本。

Many contact problems are induced to boundary values and variational problem.

许多接触问题可归结为边值问题和变分问题。

The core of this model is using solid element to simulate elastoplasticity deformation of faultage and using contact element to simulate the interface of faultage and rock, and so, realizing the problems coupling of elastoplasticity and contact.

模型的核心是以三维实体单元模拟断层或软弱夹层材料弹塑性变形特性，以接触面单元模拟断层或软弱夹层与完整岩石之间交界面的力学特性，即剪切效应和法向提离效应，从而实现了弹塑性问题和接触问题的耦合。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。