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Based on the study achievements of some predecessors,bridge,pier and abutment were simulated by solid element,rail and sleeper were simulated by space beam element,the links of rail,sleeper,bridge,pier and abutment were simulated by spring element,a three-dimensional finite element spatial mechanics model for calculating the rupture force between continuously welded rail and high-speed railway bridge was established.

在吸收前人研究成果的基础上,采用实体单元模拟桥梁及桥梁墩台,采用空间梁单元模拟钢轨及轨枕,采用弹簧单元模拟钢轨、轨枕、桥梁与墩台之间的连接,建立了断轨三维有限元空间力学模型。

A three-dimensional finite element spatial mechanics model for calculating the additional longitudinal force transmission between continuously welded rails and high-speed railway bridges is established by using solid element to simulate bridges as well as pier and abutment,using space beam element to simulate rails,using spring element to simulate the link between bridges and tracks as well as pier and abutment.

采用实体单元模拟桥梁及桥梁墩台、空间梁单元模拟钢轨、弹簧单元模拟桥梁与墩台及轨道之间的连接,建立梁—轨纵向相互作用三维有限元空间力学模型。以丰沙线永定河单线铁路桥梁、秦沈线沙河双线铁路桥梁对其进行计算验证。

This research method is to use the three-dimensional mapping software to draw the cardiovascular stent of different size first , next is it create their cardiovascular stent boundary conditions and simulation their of support after implantation according to finite element method into the human body to go; Receive different residue pressures and pressure of the repeated blood circulation , greatest stress , meets an emergency and the relation between total deformation amount caused; Being imitated the cardiovascular stent , the position with damage of fatigue life in the blood vessel by its greatest stress value at the same time ; But by the simulation result of the above , can understand that use life of Palmaz-schatz cardiovascular stent has been more than 109 up till now ; At the same time , can know the position where the stress two times concentrates , the right angle position joined in the rib and rib of Palmaz-schatz cardiovascular stent too.

本研究的方法乃是先会使用三维绘图软体画出不同尺寸的血管支架,然后在根据有限元素法去设定其血管支架的边界条件和模拟其植入人体后;受到不同的残留压力与反覆血液流动的压力,所造成的最大应力、应变及总变形量之间的关系;同时在由其最大应力值去模拟血管支架,在血管中的疲劳寿命与疲劳损坏位置;然而由以上的模拟结果,可以了解到目前Palmaz-schatz血管支架之使用寿命为109以上;同时也可以知道二次应力集中的位置,在Palmaz-schatz血管支架之肋和肋连接的直角位置。

The confidence and accuracy of distinct element method simulation model of charging of bell-less top blast furnace are only verified and affirmed by experiment. The experiments of one circle charging and multiple circle charging are made in the test model of bell-less top blast furnace.

从而,以高炉炉料颗粒离散单元法模型为基础,结合计算机实施技术,建立了高炉无钟炉顶布料的离散单元法模拟模型,并将其开发编制成了大型的计算机模拟应用程序BLTDEM,配置了功能齐全的前后处理器,以完善计算机模拟和应用。

It further proves the distinct element method simulation model of charging of bell-less top blast furnace is true, and indicates this mathematics model not only has great theory research significance, but also have full practical worth. The distinct element method simulation model of charging of bell-less top blast furnace is a computer model.

本文还对实际无钟炉顶高炉开炉布料进行了离散单元法模拟研究,模拟结果与实测结果也基本符合,这进一步证明了高炉无钟炉顶布料离散单元法模拟模型的正确性,并且表明此数学模型不仅具有理论研究意义,而且具有实用价值。

Results indicate that WRF and MM5 both can imitate distribution and tendency of the rain belt of this storm rainfall course.

结果表明:WRF和MM5都能较好的模拟这次暴雨过程雨带的分布和走向,而WRF能更好的模拟降水中心的位置和雨量;与暴雨过程相联系的低空急流和涡度场等分布特征的模拟,WRF模式亦优于MM5模式。

The feasibility of simulation test for antilock braking is analyzed using JF-132 vehicle brake tester.

第三,探讨了在JF-132型制动器试验台上模拟防抱制动的试验方法,分析了模拟防抱制动的可行性,对试验台的管路系统作出了改进,在试验台软件系统的基础上,编制了模拟防抱制动的试验程序,试验结果证明了该试验方法的有效性。

Furthermore, the paper also proposes another important algorithm: branch simulating algorithm without gap.

另外,一般的枝条模拟算法模拟植物枝条时往往在枝条间会出现缺口问题,针对这个问题,笔者提出一种无缺口的枝条模拟算法。

Numerical simulations by assemblies of circular panicles can qualitatively reflect the general characteristics of liquefaction behavior of sand. The interval effect of aspect ratio of elliptical panicle on the mechanical behavior of numerical sample is obtained, and the reason is related to the initial average co-ordination number. The regularity of evolution of fabric in the process of sand liquefaction under cyclic loading can be qualitatively achieved by using the numerical sample randomly mixed of panicles with different shapes. Numerical simulations can not only demonstrate the macro phenomenon of particle breakage, mostly importantly, it can also expose the evolution of particle breakage microscopically, and would contribute to further research of the micromechanics of particle breakage.

研究结果表明:Hertz-Mindlin非线性接触模型适用于变围压条件下砂土力学性质模拟;纯圆颗粒模拟能够定性地反映饱和砂土振动液化的一般规律;颗粒长短比变化对砂土力学性质的影响具有区间效应,其原因与粒间初始平均接触数有关;不同形状随机混合试样能够从定性规律上反映振动液化过程中砂土的细观组构演化规律;数值模拟不仅可得到颗粒破碎宏观响应,而且可以分析内部接触力变化和实现对粘结破裂位置的追踪,从而可进一步研究颗粒破碎细观力学机制。

The temperature fields of sand core for castings with thickness in 60, 30, 18 and 8 mm were simulated. The results show that the modified water glass sand has good knockout capability, and pouring experiment results also verify the simulated results.

用上述计算程序模拟计算了壁厚分别为60、30、18、8mm的铸件砂芯温度场分布,模拟结果表明改性水玻璃砂有好的出砂性,浇注实验证实了计算机模拟分析结果。

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