This tusk is done by program constructed by appropriate method . so , this thesis talks about electron trace modeling by investigating method of calculating electromagnetic field , mathematic model of modeling electron trace , and how to program 本论文从电磁场的计算方法、电子轨迹模拟的数学建模和电子轨迹模拟的程序设计三个方面对强流电子枪电子轨迹的模拟进行了研究,并利用fortran语言编写了强流电子枪电子轨迹模拟程序vbgun 。
The paper makes a " second exploitation " of ansys for solving certain problems through fortran and apdl programming in order to apply the ansys finite element simulation software tool more conveniently and effectively to the simulation analysis of the ic package 本文针对相关问题，通过fortran语言和ansys软件自带的程序设计语言( apdl )作了二次开发，编写了相关程序，从而能够更方便、更高效地利用ansys有限元软件来实现芯片封装的模拟分析。
The paper derived the formulae for the strain response mode with the knowledge of dynamics of structures , of materiaj mechanics , of elastic mechanics , and pointed out their use range . a computer program is worked out with fortran power stations 4 . 0 , it can compute the characteristic value , the characteristic vector and the strain mode for a bridge structure , and it is verified correct 论文综合结构动力学、材料力学、弹性力学等知识推导出桥梁结构应变响应模态模型的数学公式，指出了该方法的适用范围，基于fortranpowerstation4 . 0计算机工作平台，用fortran语言编制了能h算桥梁结构特征值及特征向帛羽小于变模态的哭小m序。
The modified momentum - blade theory is used in the theory calculation method , to get the result of forces , moment , power , flow flux and other parameters . the cfd software fluent is then applied to carry out the numerical simulation of flows around cooling fans with 3d meshes . the experimental results for several typical fans are analyzed and discussed as well in this paper , providing a sound ground for fan design and aerodynamic parametric analysis 首先根据经典设计方法,糅合动量?叶素理论,用fortran语言自编程序,计算风扇的气动力和力矩,得出速度、流量、功率等结果;然后利用商用计算流体力学软件fluent和三维网格生成软件gambit进行风扇的数值模拟计算,分析其流场的气动特性;本研究还对风扇的风道实验数据进行了分析讨论,为风扇的气动设计和参数分析打下基础。
The three - dimensional convective storm numerical model system is based on the three - dimensional convective storm model ( csm3d ) developed in the institute of atmospheric physics ( 1ap ) , chinese academy of sciences . this system is an interactive system running in windows operating system and can be used in severe convective cloud numerical simulation and numerical forecast in the system designation , software is programmed in vc + + , fortran and grads . mixed - languages programming ( vc + + and fortran ) , multithreading programming , vc + + interface programming and windows shell programming are applied 使用visualc + +和fortran语言以及grads等软件，利用vc + +和fortran混合语言编程技术、 visualc + +界面编程技术、 windowsshell编程等多种编程技术，基于多线程程序设计思想，将原来的基于dos操作系统的强对流云数值模式系统移植到windows操作系统下，理顺了原系统各个模块之间的逻辑关系，建立了具有windows风格的友好界面，本系统操作简单直观，交互性好，方便使用者的操作。
As a part of the civil 863 plans , two multiple - contact models for two kinds of braking system are built in the paper , in which contact fields are described as coons surfaces , initial velocity is programmed in fortran . the thermal - mechanical coupling braking processes are simulated for the first time by msc . marc , the general - used nonlinear fem software . time distributions of the velocity , the stress and the temperature of the components under various initial velocity and brake force are obtained , which offer theoretic gist to study the life of the wheel , the disc and so on 作为国家行业863重大课题《铁路机车车辆虚拟样机系统》的一部分，本文在研究接触问题和热?机耦合问题数值方法的基础上，采用国际上通用的非线性有限元分析软件msc . marc建立了踏面制动和盘形制动主要部件的多体接触计算模型，其中用解析方法描述，即用nurb曲线、高斯曲面来描述接触区域，用fortran语言编写定义初速度的用户子程序，首次对两种制动过程热?机耦合进行了数值仿真，定量给出了主要制动部件在不同初速度、不同制动力下各个时刻的速度、应力和温度的变化规律，为研究车轮、闸瓦以及制动盘寿命提供了理论依据。
In this paper , key method is that it takes mixed programming means and human - machine mutual mode to develop cad system ; gives priority to c as master programming language in unix graphics workstation ; puts to use fortran working out structure ' s computing program ; adopts osf / motif scheming out friendly gui ; utilizes opengl function library achieving visualization of design calculation 其中关键技术是采用混合编程技术和人机交互方式来进行cad系统设计，在unix图形工作站上以c语言为主控程序语言，以fortran语言编制结构计算程序，采用osf motif开发友好gui ，调用opengl函数库实现设计计算的可视化。
At the same time , the program corresponding to the proposed method is compiled in fortran90 , which is used to analyze the influence of several factors on behaviour of barrettes , including ratio of length to width , ratio of depth to equivalent diameter , ratio of modulus of pile to soil , possion ' s ratio , the finite layer etc . many useful conclusions are obtained from the above analyse 该方法考虑了壁板桩桩身横截面的非轴对称性，并用fortran语言编制了相应的程序，进而分析了多种因素对壁板桩承载特性的影响，包括长宽比、桩径比、桩土刚度比、泊松比以及有限压缩层深度等。
At the same time it has the shortcoming of complex mechanics analysis . in this thesis we mainly discuss the structure behaviors of the mega structure . firstly considering the differences between mega - frame and normal - frame , that is the influence of rigid zone and shearing type deformation are considered . a computer program for calculation of mega - frame structures based on element stiffness matrix to members with rigid zone considering shearing type deformation has been written and some of mega - frames have been calculated by using the program 首先,根据巨型框架与普通框架的主要区别,采用带刚域杆件考虑剪切变形时的杆单元模型,利用fortran语言编制了巨型框架结构线弹性有限元静力分析程序,并利用该程序对多个巨型框架结构进行了计算,分析了巨型框架结构的静力性能,深入研究了结构在竖向荷载和水平荷载作用下的传力机理、力学特性和变形特点。
With the help of this program , this paper does research on the moved backwards of the slide surface , lengthening the anchor section , the soil nail ' s total force , gets conclusion about relations between the soil nail ' s length and the slope ' s grade , height , soil ' s mechanical parameter ; relations between soil nail ' s total force and coulomb soil pressure . with the help of the large multiuse finite element program ansys , this paper analyzes the soil nailing in one - step ' s slopes , in two - steps " slopes , puts the emphasis on the axis force ' s distributing along the soil nail at each rows , the effect of both the excavating mode and the original slope figure to the axis force of the soil nail , the one another effect between the upper - step slope and the nether - step slope in the soil nail ' s axis force , gets conclusion about the design of soil nail at the first low , different slope body is the same with different excavating mode , the original slope figure has more effect to some than others because of the slope body , the reasonably design of the step width in two - steps slopes , the two - steps excavating and retaining has more virtue than the one - step ' s . through soil pressure analysis this paper does research on the differences and the links between the coulomb soil pressure theory and the rankin ' s , the vertical pressure at the slope surface when the slope surface is inclined and the retaining wall is rough , the soil pressure ' s distributing behind the panel , gets conclusion about the effect of both the slope body inner stability and the slope surface local stability to the soil pressure 通过分析比较，论证了对数螺旋线型比圆弧形作为边坡的假设滑裂面具有较多的工程优点，并为此编制了一个采用极限平衡法分析土钉支护的fortran语言程序，以此作工具对滑裂面的后移、土钉锚固段的超长、土钉总力的大小等方面作了研究，得出了有关土钉的长度与边坡的坡角、坡高、土体力学参数的关系、土钉总力与库仑土压力间的关系等结论；采用大型通用有限元数值分析程序ansys分别对采用土钉支护的一阶边坡、二阶边坡进行分析，重点是研究各排土钉的轴力分布规律、开挖方式及原始边坡形态对土钉的轴力的影响、上下阶边坡在土钉轴力方面的相互作用，得出了有关第一排土钉的设计问题、不同类型的土体应适用于特定的开挖方式、原始开挖出的边坡形态对一些类型坡体的边坡土钉支护有较大的影响而对另外一些影响不大、二阶边坡台阶宽度的合理确定、二阶开挖及支护比一阶时具有较多的工程优点等结论；通过土压力分析对朗肯、库仑两种经典土压力理论的区别与联系、坡面倾斜及墙背有摩擦时的坡面竖向应力分布、面板背土压力的分布形态作了研究，得出了边坡支挡土压力受坡体内部稳定与坡面局部稳定两个方面的影响、土钉支护面板背土体中卸荷拱的存在对面板受力有利等结论。
