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 本論文從電磁場的計算方法、電子軌跡模擬的數學建模和電子軌跡模擬的程序設計三個方面對強流電子槍電子軌跡的模擬進行了研究,并利用fortran語言編寫了強流電子槍電子軌跡模擬程序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 本文針對相關問題,通過fortran語言和ansys軟件自帶的程序設計語言( apdl )作了二次開發(fā),編寫了相關程序,從而能夠更方便、更高效地利用ansys有限元軟件來實現(xiàn)芯片封裝的模擬分析。
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 論文綜合結構動力學、材料力學、彈性力學等知識推導出橋梁結構應變響應模態(tài)模型的數學公式,指出了該方法的適用范圍,基于fortranpowerstation4 . 0計算機工作平臺,用fortran語言編制了能h算橋梁結構特征值及特征向帛羽小于變模態(tài)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 首先根據經典設計方法,糅合動量?葉素理論,用fortran語言自編程序,計算風扇的氣動力和力矩,得出速度、流量、功率等結果;然后利用商用計算流體力學軟件fluent和三維網格生成軟件gambit進行風扇的數值模擬計算,分析其流場的氣動特性;本研究還對風扇的風道實驗數據進行了分析討論,為風扇的氣動設計和參數分析打下基礎。
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語言以及grads等軟件,利用vc + +和fortran混合語言編程技術、 visualc + +界面編程技術、 windowsshell編程等多種編程技術,基于多線程程序設計思想,將原來的基于dos操作系統(tǒng)的強對流云數值模式系統(tǒng)移植到windows操作系統(tǒng)下,理順了原系統(tǒng)各個模塊之間的邏輯關系,建立了具有windows風格的友好界面,本系統(tǒng)操作簡單直觀,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 作為國家行業(yè)863重大課題《鐵路機車車輛虛擬樣機系統(tǒng)》的一部分,本文在研究接觸問題和熱?機耦合問題數值方法的基礎上,采用國際上通用的非線性有限元分析軟件msc . marc建立了踏面制動和盤形制動主要部件的多體接觸計算模型,其中用解析方法描述,即用nurb曲線、高斯曲面來描述接觸區(qū)域,用fortran語言編寫定義初速度的用戶子程序,首次對兩種制動過程熱?機耦合進行了數值仿真,定量給出了主要制動部件在不同初速度、不同制動力下各個時刻的速度、應力和溫度的變化規(guī)律,為研究車輪、閘瓦以及制動盤壽命提供了理論依據。
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 其中關鍵技術是采用混合編程技術和人機交互方式來進行cad系統(tǒng)設計,在unix圖形工作站上以c語言為主控程序語言,以fortran語言編制結構計算程序,采用osf motif開發(fā)友好gui ,調用opengl函數庫實現(xiàn)設計計算的可視化。
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 該方法考慮了壁板樁樁身橫截面的非軸對稱性,并用fortran語言編制了相應的程序,進而分析了多種因素對壁板樁承載特性的影響,包括長寬比、樁徑比、樁土剛度比、泊松比以及有限壓縮層深度等。
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,根據巨型框架與普通框架的主要區(qū)別,采用帶剛域桿件考慮剪切變形時的桿單元模型,利用fortran語言編制了巨型框架結構線彈性有限元靜力分析程序,并利用該程序對多個巨型框架結構進行了計算,分析了巨型框架結構的靜力性能,深入研究了結構在豎向荷載和水平荷載作用下的傳力機理、力學特性和變形特點。
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 通過分析比較,論證了對數螺旋線型比圓弧形作為邊坡的假設滑裂面具有較多的工程優(yōu)點,并為此編制了一個采用極限平衡法分析土釘支護的fortran語言程序,以此作工具對滑裂面的后移、土釘錨固段的超長、土釘總力的大小等方面作了研究,得出了有關土釘的長度與邊坡的坡角、坡高、土體力學參數的關系、土釘總力與庫侖土壓力間的關系等結論;采用大型通用有限元數值分析程序ansys分別對采用土釘支護的一階邊坡、二階邊坡進行分析,重點是研究各排土釘的軸力分布規(guī)律、開挖方式及原始邊坡形態(tài)對土釘的軸力的影響、上下階邊坡在土釘軸力方面的相互作用,得出了有關第一排土釘的設計問題、不同類型的土體應適用于特定的開挖方式、原始開挖出的邊坡形態(tài)對一些類型坡體的邊坡土釘支護有較大的影響而對另外一些影響不大、二階邊坡臺階寬度的合理確定、二階開挖及支護比一階時具有較多的工程優(yōu)點等結論;通過土壓力分析對朗肯、庫侖兩種經典土壓力理論的區(qū)別與聯(lián)系、坡面傾斜及墻背有摩擦時的坡面豎向應力分布、面板背土壓力的分布形態(tài)作了研究,得出了邊坡支擋土壓力受坡體內部穩(wěn)定與坡面局部穩(wěn)定兩個方面的影響、土釘支護面板背土體中卸荷拱的存在對面板受力有利等結論。