AS2.0和XML制作Flash MX 2004课件的研究

主要阐述Action Script 2.0、XML数据结构和Flash MX 2004综合开发制作Flash课件的基本原理.三者综合形成的课件能够完成动态修改授课内容,动态加载各种文件内容等.     

钢筋混凝土粘结应力和局部滑移相互关系的 分方程及“悬臂虚梁”法的研究

本文对基本条件进行了分析,导得了粘结应力-局部滑移相互关系的二阶微分方程和六个边界条件,这些方程即为探索粘结状态内在规律的基本方程,但按目前的研究途径求解是很困难的.根据数学关系的相似性,文中提出了虚设的悬臂梁分析模型,则任一点局部滑移、裂缝宽度、钢筋与混凝土的应变差、相邻裂缝间的钢筋总伸长与混凝土总伸长、钢筋平均应变、钢筋应变不均匀系数以及粘结状态钢筋的刚度等重要变量的表达式均可以简便地导得.建议的方法可用于裂缝、变形、粘结性能和有限元法的分析.     

基于UGNX的电脑机箱跌落特性分析

为改变传统物理样机验证的高成本和低效率，针对电脑机箱的耐跌落特性分析，经过一系列的等效转换后，UGNX软件提供的CAE模块，可以分析出电脑机箱CAD模型上的缺陷和结构上的薄弱环节，为机箱的设计修改提供强有力依据，所述结果与实际情况比较吻合。不谨如此，UGNX软件主模型还能实现电脑机箱CAD／CAE设计和验证参数化。所述方法能适用于其它家电产品的设计和分析上。     

INTERPOLATED FINITE ELEMENT METHODS FOR SECOND ORDER HYPERBOLIC EQUATIONS AND THEIR GLOBAL SUPERCONVERGENCE

We develop the interpolated finite element method to solve second-order hy-perbolic equations. The standard linear finite element solution is used to generate a newsolution by quadratic interpolation over adjacent elements. We prove that this interpo-lated finite element solution has superconvergence. This method can easily be applied togenerating more accurate gradient either locally or globally, depending on the applications.This method is also completely vectorizable and parallelizable to take the advantages ofmodern computer structures. Several numerical examples are presented to confirm ourtheoretical analysis.     

用有限元法分析管道在空间内的固液耦合振动

本文用有限元方法研究有液体流动管道在空间内振动,液体流速与压强对其固有频率的影响。给出运动微分方程及其解法,并通过实例加以验证。     

引黄入晋联结段7号隧洞TBM卡机事故原因数值模拟分析

针对围岩中存在层间剪切带而导致引黄入晋联结段7号洞TBM(隧洞掘进机)施工过程中发生卡机停工的工程事故[2],在现场调查和工程地质分析基础上,本文运用二维弹塑性有限元方法[1],结合已有的力学参数和初始地应力条件,对其进行了模拟分析。其结果一方面量化和证实了工程地质定性分析结论,即层间剪切带是事故发生的主要原因;另一方面给出了发生剪应力集中区,有利于进一步认识问题的机理和影响范围。     

船舶兴波流场mj求解的边界元计算方法

船舶前进定常兴波对非定常水动力问题的影响，在物面边界条件中通过所谓的mj项体现出来。由于mj项含有定常兴波势的二阶导数，给实际计算带来困难。本文将边界元方法求解叠模流场mj项的技术进一步扩展到定常兴波流场mj项的计算。并以潜体为例给出计算结果。     

高应力软岩煤巷锚网索支护技术研究

为了研究锚网索支护技术在软岩煤巷的适用性,对2407巷道原锚网索支护方案出现的问题和软岩巷道破坏原因进行了分析,根据有限元计算结果确定支护关键部位。在此基础上,对支护方案进行优化设计,确定了具体的耦合支护参数。     

Comparison and analysis of dislocation density, morphology and evolution in microstructure of low-carbon steel produced using different technologies

Three kinds of specimens were produced from hot strips of similar composition and same thickness （nominal gauge 4.0 mm） but produced using different technologies, and the dislocation density of these strips was quantitatively measured by positron annihilation technique test. The dislocation morphology and evolution in microstructure of each pass for producing the 1.9 mm hot strip using CSP （compact strip production） technology were observed under an H-800 transmission electron microscope; its density was also quantitatively measured using the positron annihilation technique test, and the factors influencing the dislocation density during the production process were analyzed. The experimental results show that the dislocation density in the microstructure produced using CSP technology is higher than that in the microstructure produced using conventional technology. This result was discussed and confirmed on the basis of the finite element simulation and the theory relevant to dislocations.