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It effectively solves the problem of contact mechanics between burden granules. The dynamic data structure that is a linked list is built to save and delete the varying data in simulation calculation process. Therefore, the distinct element method simulation model of charging bell-less top blast furnace is established in view of the distinct element method model of blast furnace burden granular.

本文首先对离散单元法的基本原理和数值计算方法进行了系统研究，针对高炉炉料颗粒介质特点，对离散单元法进行了相应改进，建立了高炉炉料颗粒运动的离散单元法基本数学模型，推导出了相应的高炉炉料颗粒离散单元法数值计算基本参数的计算公式，例如阻尼、刚度、时步等，并确定了合理的数值模拟参数值。

In this dissertation, first, based on theory of cutting tooth about the gleason spiral bevel gear, the equation of meshing in the process of cutting tooth, the surface equation of generating gear as well as the general tooth surface equation of the double circular arc spiral bevel gear, using GB12759-1991 type of double circular arc gear as a basic gear profile, a three-dimension solid model of double circular arc spiral bevel gear which has the good adaptability was carried out by used of Unigraphics software;Second, by researching of the algorithm about contact and collision as well as various contact types based upon Contacting Finite Element Method, a foundation was laid for selecting the contact type in analyzing contact stress of double circular arc spiral bevel gearing;Finally, through the connection port of PARASOLID between UG software and ANSYS/LS-DYNA software, the three-dimension solid model of double circular arc spiral bevel gearing obtained above in UG was imported into ANSYS/LS-DYNA, a finite element analyzing about contact stress of double circular arc spiral bevel gearing was carried out by applying new loading method.

本文首先基于格利森弧齿锥齿轮加工原理及切齿啮合过程中的啮合方程、产形轮齿面方程以及双圆弧弧齿锥齿轮的齿面方程，选用GB12759-1991型双圆弧齿轮基本齿廓为基准齿形，利用Unigraphics软件的建模功能，绘制了有较好适应性的双圆弧弧齿锥齿轮传动三维实体模型。其次，描述了应用有限单元法进行实体接触与碰撞问题算法的公式，研究了有限元分析中的各种接触类型以及双圆弧弧齿锥齿轮接触应力分析中所选择接触类型的依据。最后，通过UG软件和ANSYS/LS-DYNA之间的PARASOLID接口工具包，将UG软件中得到的啮合齿轮模型导入ANSYS/LS-DYNA有限元分析软件，给出一种新的加载方法，进行了双圆弧弧齿锥齿轮传动的接触应力的有限元分析。

According to the test, the distribution of steel tube strain in course of shear bond failure is analyzed in detail.The finite element analysis model of the shear bond at the interface of CFST was also built up. Steel tubes, concrete and the interface between steel and concrete were modeled by Shell, 3D Entity and Contact element, respectively.

此外，本文还对其中2根圆钢管混凝土试件和2根方钢管混凝土试件的钢管外表面进行了应变追踪测试，研究了钢管混凝土在抗剪粘结破坏过程中钢管外表面应变分布规律。

New progresses in finite element analysis for telescopic box section hoist boom of truck cranes are summarized. Merits and defects of existing finite element methods arc analyzed.

总结汽车起重机箱形伸缩式吊臂有限元分析国内新进展，分析现有的有限元方法优缺点。

Considering the loading and boundary conditions of the model finite element calculation is carried out. Both for the working conditions of prestress and load, the finite element model of the box beam is approved to be suitable and correct by the actual test results.

考虑模型的载荷及约束进行有限元计算，在预应力和载荷两种工况下，利用实测结果论证了箱型梁的有限元分析模型是合适和准确的。

New type brake beam limited element model structure analysis solid element

新型制动梁；有限元建模；结构分析；实体单元

The result of study show:The landscape elements of the landscape system in the eastern section of QiLian mountain that mainly is grassland, and the forest and bush landscape elements large-scale distribution in it;Snow and ice landscape element and water was scattered in the mountain landscape by relatively small area, the water element which runs through the various landscape elements,The results show that, the study area, QiLian Mountain is high heterogeneous region and number of the high heterogeneous is moving.

结果表明：祁连山东段山地景观系统中草地景观要素为基质，水域景观要素为廊道，而森林、灌木以及冰雪景观要素为斑块；山地景观系统呈现出高度景观异质性且在1994年到2008年之间表现出明显的异质性变化。

The finite element analysis model of pre-pressing contact of low carbon steel resistance spot welding un-der spherical electrode condition is created with the finite element software.

1前言电阻点焊是汽车制造领域中的主导加工工艺，每辆汽车上的电阻焊点平均为3000～5000个[1]，因此电阻点焊的质量很大程度上影响着汽车的质量。

In this text the first part analyses the origin of the appearance of modern painting's decorative character, that is because of the development of the society under which is subjected to the new philosophy thought and art idea, meanwhile it is stimulated by the originality art and east art etc; in the second part elaborates the exploration of painting's decorative character by Western modern painting artists by analysising individual cases; the third part recounts the concrete manifestation of modern painting's decoration by analysising the composition, shape, color, skin texture aspect etc; the forth part puts forward the influence of western modern painting's adornment element to China contemporary painter and China painters'investigation to the adornment element.

本文第一部分分析西方现代绘画出现装饰性的历史渊源，既是由于社会的发展，受新的哲学思想、艺术观念的影响，又是受原始艺术和东方艺术等外来艺术的刺激；第二部分以个案分析的形式阐述了西方现代派画家对绘画装饰性的探索；第三部分着重从构图、造型、色彩、肌理等几个方面来述说现代绘画装饰性的具体表现；第四部分提出西方现代绘画装饰性对中国当代画家的影响及中国画家在装饰性上的探索。

A numerical model of wave diffraction was established using infinite similar element method,coupled with finite element method,to obtain wave force on a vertical cylinder of arbitrary cross section.

在海岸和近海工程中，如海上平台、离岸式码头及防波堤等大型建筑物，它们的水下结构往往是由一系列墩柱组成，这类构筑物的主要外力之一是作用在它上面的波浪力[1—2]。

Metrorrhagia is also gynaecological problems of common diseases.

崩漏是妇科常见病也是疑难症。

WordFTP gives you the convenience and timesaving you need.

wordftp让您的方便和省时您所需要的。