Theory of finite element method and finite difference method for bfia are briefly discussed 摘要簡要分析了用有限元法和有限差分法計算下部鉆具組合的理論。
By the theory of finite element analysis , the intension of the steel wheel is analyzed and the stress drawing of the steel wheel is made 摘要應(yīng)用有限元分析理論,對鋼圈的結(jié)構(gòu)進行強度分析,得到鋼圈的應(yīng)力分布圖。
Based on the theory of finite element method , the factor of safety of slope stability is straight obtained by examining the convergence of calculation after making material strength reduced 本文基于有限元法,通過對邊坡巖土體材料參數(shù)的折減和判斷有限元計算收斂性,直接獲得邊坡穩(wěn)定安全系數(shù)值。
Based on the theories of finite element and reliability , the basic idea about application of the stochastic finite element method used to analyze the abutment stability against sliding of the arch dam is presented in this paper 本文以有限元理論和可靠度理論為基礎(chǔ),提出了應(yīng)用于拱壩壩肩抗滑穩(wěn)定分析的隨機有限元的基本思路。
At first , the paper introduces the elementary theory of finite element method and optimum design , and then introduces the chief functions and characteristics of the finite element software , ansys , and the cad software , pro / engineer , in detail 本文從介紹有限元及優(yōu)化設(shè)計的基本思想著手,具體說明了有限元分析軟件ansys以及cad軟件pro / engineer的功能及其主要特點。
The topic first illuminates the significance about a axle of airplane ' s main landing gear and other parts . the paper presents the basic theory of finite element method in detail . and it adapts general engineering fea software system ansys 本文首先闡述了飛機主起落架的車軸等主要部件的作用,論文詳細地闡述了有限單元法的基本原理,并引入了大型工程有限元分析軟件? ? ansys 。
Basing on the theories of finite element method , analysed computer simulation of high frequency structure in resonator ; 3 . compared effects to resonate frequency and fields caused by coupling slots of buncher in different azimuth ; 4 從有限元理論的角度出發(fā),對計算機仿真計算諧振腔內(nèi)高頻場結(jié)構(gòu)進行了分析探討; 3比較了調(diào)制腔部分耦合縫的位置變化對諧振頻率及腔內(nèi)場的影響; 4
The main works and achievements are described : firstly , the characteristic of contact problems and the theory of finite element method are introduced , then on the base of finite element method , building models about contact problems are discussed , and the basic theories of some algorithms such as general finite element method , super element method and mix finite element method are presented simply 工作內(nèi)容主要包括以下幾個方面:首先介紹接觸問題的特點及有限元法的一般原理。然后討論接觸問題有限元模型的建立,并對接觸問題的一般有限元法、超元技術(shù)、混合有限元法的基本原理作簡要闡述。
In this dissertation , the theories of finite element and the buckling analysis of shell are discoursed systematically . under the direction of these theories , with the help of ug software and msc / nastran software , the defective casing texture is analyzed on static strength and buckling , and then , the maximum loads of the texture with different defect value are gotten , the changeable curve of the maximum load with the defect value and the permissible defect value are gotten . that the texture with various defects can be destroyed variously is discoursed in considerable detail as well 本論文系統(tǒng)論述了有限單元法和板的屈曲穩(wěn)定理論,并在這些理論的指導下,以ug軟件和msc nastran軟件為工具,對存在一定幾何缺陷的典型箱形構(gòu)件進行靜強度和屈曲的綜合分析,分別得出了不同缺陷度的構(gòu)件的極限載荷,從而得到缺陷度與極限載荷的變化曲線,給出了缺陷度的最大許用值;同時,本論文還針對不同缺陷度構(gòu)件的破壞形式不同這一問題進行了詳盡的論述。
Then the general plan of underwater vibrators is put forward . in chapter 3 , combining fluid - solid coupling theory and mechanical vibration theory , we get the coupling equation of moving parts and water . the dynamic characteristics of moving parts are studied with theory of finite element , and additional mass of moving parts is found in fluid - solid coupling field , which makes vibrator ' s natural frequency descend and amplitude - frequency curve downward shift 第三章運用流固耦合理論和機械振動學理論相結(jié)合的方法建立運動部件與水的耦合運動方程,利用有限元法對其的動態(tài)特性進行了研究,得到了在流固耦合場下運動部件存在的附加質(zhì)量,該附加質(zhì)量導致固有頻率下降,單位推力下的加速度頻響曲線整體下移。