弹性力学

Employed the Hamiltonian system theories of elastic mechanics, a series of crack singular analytical elements satisfying different boundary conditions along crack surfaces in the vicinity of crack tip are constructed. These hyper-elements can describe the crack tip fields accurately for different simplified fracture models.

应用弹性力学哈密顿体系理论，在裂纹尖端构造出满足不同裂纹表面边界条件的一类裂纹奇异解析元，该类超级单元能够准确描述不同简化模型下的裂纹尖端场。

The formulation for the contact force between two spheres and the stress and displacement which is caused because of the contact force is also derived. The calculation method of the contact of sphere and plane, sphere and tee is given .At the same time, the formulation for the force distribution of the contact surface is established on the discussion of two arbitary elastomer's contact.

第二章以《弹性力学》理论为基础，详细地介绍了接触单元理论，导出了两个球体之间的接触压力及由此引起的应力和变形，给出了球体与平面相接触、球体与球座相接触的计算方法，同时，对于两任意弹性体接触的讨论，得到了接触面上压力分布的公式。

Static equilibrium of structure is regarded as a self organizing process of cell s under the condition of force and displacement boundary.

用细胞自动机作平面弹性力学分析，将结构的静平衡认为是在力和位移边界条件下，物体元胞间的自组织过程。

The residual stress distribution of the tangential residual stress,the hoop residual stress and the normal residual stress test of spiral seam arc weld pipe were studied on the basis of elastic mechanics analysis and superposition theorem.

基于弹性力学应力分析和叠加原理，研究了螺旋缝埋弧焊管切环法残余应力测试中的残余应力分布。

This paper investigated the stress response while the reactor endures thermal shock, and bring out the basic thermal-elastic mechanics equations and their solutions. It also discussed the thermal stress changes with time, study on the relationship between stress and radium. It provides theoretical references for reducing reactors'damage from thermal shock.

论文研究了反应器承受热冲击作用的应力响应，给出了热弹性力学基本方程及方程解，探讨了热应力随时间的变化及当量应力与半径的关系，从而为研究反应器减小热冲击损伤提供了理论参考。

Subsequently, elastic behaviors of single polymer chains confined on rough surfaces constructed with an undersurface and some periodically tactic pillars are investigated.

接着研究了吸附在粗糙表面上的三维高分子单链的构象变化过程及弹性力学行为。

Therefore, it is necessary to explain the usage condition of the theorem of uniqueness of solution of elasticity.

为此，需要对弹性力学解的唯一性定理的适用条件适当加以说明。

Thequasi-conforming element methods are the exact solutions of generalized compatibilityequation and satisfy the weak continuity requirement naturally.

叙述了弱形式的弹性力学哈密顿正则方程，边界条件作为非齐次项，以便于采用数值、半解析和解析计算方法。

Methods Based on the elastic mechanics of the normal skin around facial spherical defects and geometrical principles, the dolabriform flaps were devised. The largest diameter of defect was 4.2cm.

我们利用颜面部圆形缺损周围正常皮肤的弹性力学和几何学原理，于缺损周边设计斧形皮瓣，修复缺损直径最大者4.2cm。

In this paper, the research object is the XM18 spherical generator, in order to improve the dynamic behavior of the machine tool, the following aspects have been studied in this thesis: Firstly, based on the elasticity theory and finite element analysis theory, the finite element models of the lathe bed, dovetail, dovetail shelf, headstock, fanlike plank and millhead shelf, which were the main parts of the spherical generator, were built up using ANSYS9.0. And based on the modal analysis theory and FEM technology, the free modal and the constrained modal analysis of the main parts were studied. Accordance to the analytical results, put forword methods to optimize the key parts.

本课题以XM18球面铣磨机为研究对象，为了提高其动态特性，本文主要从以下几个方面进行研究：首先，根据弹性力学理论和有限元分析的基本理论，利用ANSYS9.0软件建立了铣磨机的主要零部件床身、燕尾、燕尾座、主轴箱、扇形板和磨头座的有限元模型，利用有限元法对主要零部件进行了自由模态和约束模态分析，并根据分析结果对关键部件提出了改进方案。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。