接触问题

Another key point in the contact problem is how to deal with such contact constraints as normal force constraints and displacement constraints.

在接触问题分析中，接触约束的施加是一项关键的技术。

Good agreements are found while comparing the FE analysisresults with available analytical results. It shows that the FE method of tireanalysis under driving state and the method dealing with large slip frictionalcontact problems are correct and reliable.

基于本文提出的大滑动摩擦接触问题求解方法，通过在胎圈和轮辋接触节点上施加滑移滚动约束，提出了匀速滚动条件下轮胎驱动特性有限元分析方法，并编制了有限元分析模块。

It shows that the FE method of tireanalysis under driving state and the method dealing with large slip frictionalcontact problems are correct and reliable. The properties of tires under steady cornering state are studied with FEmethod and experiment. Based on the presented contact solution algorithm, a FEmethod is carried out to analyze the properties of tire under steady corneringstate via imposing slip-rolling-constraints on tire bead nodes which contact therim, and the modules are programmed. The mechanical properties anddeformation of tire under pure steady cornering state and steadycornering-driving state are analyzed, and the results show good agreement withthe experimental data.

对匀速侧滑条件下轮胎侧偏特性进行了试验研究和有限元分析研究，基于本文提出的大滑动摩擦接触问题求解方法，通过在胎圈和轮辋接触节点上施加侧偏滚动约束，得到了匀速侧滑条件下轮胎侧偏特性有限元分析方法，编制了有限元分析模块；利用本文给出的有限元分析方法，分析了轮胎在匀速纯侧滑和侧滑-纵滑联合工况下受力变形特性，分析了侧偏角和载荷对轮胎侧偏特性的影响。

In order to improve the capability of Hooke's universal joints, the effects of structural parameters on the contact pressure distribution are analyzed based on Lundberg's logarithmic equation and the numerical calculation of three-dimension elastic contact problems in finite length.

为改善万向节的性能，文中基于Lundberg对数凸型方程和三维有限长弹性接触问题的数值计算，分析了轴承结构参数对接触压力分布的影响，提出滚针凸度量设计时必须考虑滚针倒角半径和越程槽宽度的影响，并给出了相应的数值计算方法。

Based on the characteristics of the manned spherical pressure hull in the submersible,the authors think that there are contact problems in the locations of the access hatch and three viewports.

基于对载人耐压球壳特点的分析，作者认为在出入舱口和三个观察窗部分严格来说是接触问题，应该采用接触有限元分析的方法而不是通过假定没有滑动采用传统的有限元分析。

The numerical example shows the validipy and effectiveness in the analysis of the contact problem of tire/road interface by this approach.

轮胎 /路面的接触问题是一个强非线性问题，这决定了求解这类问题的复杂性和困难性。

Based on finite element theory, the contact problem of sliding block was studied with the application of Stribeck friction model, and the stress and displacement distribution of sliding block were obtained.

以干摩擦滑块模型为对象，基于有限元理论研究了Stribeck摩擦条件下的准静态单边接触问题，探讨了Stribeck摩擦对接触求解的影响。

Then the uniqueness of the solution of variational inequality for the elastoplastic contact problems is demonstrated.

针对弹塑性接触问题所构造的等价变分不等式，解除了弹塑性本构状态约束方程和接触状态约束方程的约束。

BEM for elastio-plastic contact problem is employed to study the deformation and loading station of the sleeve and roller neck of film bearing in rolling mill under special way of assembly in this paper.

利用弹塑性接触问题边界元法分析了轧机油膜轴承锥套与轧辊辊颈装配过程中的变形和载荷特性，讨论了接触应力和变形对锥套与辊颈损伤的影响，给出了防止锥套与辊颈装配过程损伤的具体改进措施。

In this paper, a 4-node plate element combined with rivet element and contact element is employed to analyze two typical rivet joint structures, i.e., lap joint and butt joint. The penetration between two sub-plates in the lap zone or butt zone is avoided by introducing contact element in the proposed FE model. Bending deformation and its effect on in-plane displacement of the two typical rivet joint structures are studied.

本文采用四节点板单元，结合铆钉单元、接触单元，建立了针对铆接搭接及铆接对接两种典型结构的有限元模型，并考虑了搭接或对接区内的接触问题，通过参数分析研究了铆接搭接和对接结构在拉伸载荷下的弯曲效应及其对面内位移的影响。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷