Based on the viewpoint of interaction between waves in plasmas , the partial differential equation that causes the spectral lines broadening has been deduced from radiation transfer equation of high - frequency electromagnetic waves in plasmas . the numerical solution has been obtained by using the fortran program we compiled . we concretely calculated the spectral lines widths of and fraunhoferx 3704 in corona , fj / a4923 . 9 in dwarf nova oy car and f . / a4934 in the variable star rr lyrae 本文从等离子体波与波相互作用观点出发,由高频电磁波辐射转移方程导出了引起谱线宽度变化的偏微分方程,编写fortran程序求解偏微分方程的数值解,具体计算了日冕绿线f _ exiv 5303和夫朗禾费线3704 、矮新星oycarf _ eii 4923 . 9 、天琴rr型变星f _ ei 4934的谱线加宽值,对以上各谱线加宽中的等离子体致宽效应作了初步计算。
A good model of the full - grade aggregate concrete with high aggregate content is precondition to successfully execute concrete meso - mechanical simulation , so that the main work in the dissertation is focused on the following study concerning the random aggregate model of dam fully - graded concrete : ( 1 ) based on the topology of spherical aggregates , an algorithm of the random convex polyhedron aggregate model was presented considering the actual aggregate content , grading , and aggregate shape , and corresponding fortran program was developed to generate random convex polyhedron aggregate 针对全级配大坝混凝土的实际骨料含量和骨料形态,本文做了以下主要工作: ( 1 )在一种高效率生成的随机球骨料模型的基础上,形成随机凸多面体骨料模型,同时研究了细观单元属性判别方法,编制了对含有凸多面体骨料的细观区域进行结构性有限元网格剖分程序。本文给出的三维随机骨料模型算法不但考虑了混凝土的骨料的实际级配和含量,而且计及了骨料的实际形态。
The stress and deformation in any spots of 3d foundation soils which is under rectangular homogeneously distributed load are calculated and analyzed by methods of elastic theory and fortran program ; 3 . the scope of foundation soils deformation under rectangular homogeneously distributed load is analyzed by the use of slide and move thread theory ; 4 . by using the finite element analysis software of ansys , with engineering examples , the deformation characteristics of 3d elastic - plastic foundation soils under rectangular homogeneously distributed load are imitated and analyzed , at the same time , the method of settlement calculation of soils is checked 研究内容包括: 1 、测试了天然地基、复合地基在不同压板形状及尺寸下承压板下及周围地基土体的沉降,并做了数据计算分析; 2 、利用弹性理论方法和fortran程序分析计算了三维地基土体在矩形均布荷载下任意位置点的应力及变形; 3 、利用滑移线方法分析了均布荷载下土体的变形范围问题; 4 、应用ansyas大型有限元分析软件,结合工程实例,模拟分析了三维弹塑性地基土体在方形均布荷载下的变形特性,并对地基沉降计算方法进行了工程验算。
The main work carried out goes as follows : ( 1 ) the principal theory of nonlinear finite element analysis was expatiated and a computer program was developed with fortran powerststion . the reliability of the fortran program was proved by comparing computed results with experimental results , besides , by using this program . the appropriate length of shear connections of slit shear walls was investigated 本文的主要内容有以下几个方面: ( 1 )阐述了剪力墙结构非线性有限元分析的基本理论,编制了静力非线性分析的fortran程序,程序的可靠性通过理论计算与试验结果的对比加以验证,并用该程序分析了带竖缝耗能剪力墙,探讨了耗能剪力墙结构的连梁合理高度问题。