With the development of finite element technique and computer technology , numerical simulation has become an effective tool for optimal designing and analyzing the process gradually 隨著有限元技術(shù)與計(jì)算機(jī)技術(shù)的發(fā)展,數(shù)值化模擬已經(jīng)逐漸成為工藝分析和優(yōu)化設(shè)計(jì)的有效工具。
The acoustic reflections from a submerged piezoelectric / elastic bilaminar sphere shell are studied by applying of the computational software ansys in which the finite element technique is used 摘要采用有限單元計(jì)算軟件ansys對(duì)無限水域中壓電彈性材料復(fù)合層球殼的聲波反射進(jìn)行了數(shù)值研究。
The forward problem is solved using a finite element technique in two dimensions that is a foundation of the inversion problem . this paper finished 2 - d finite element forward program based on the theory of 2 - d finite element technique 正演計(jì)算是電阻率反演成像的基礎(chǔ),本文從二維有限元基本理論出發(fā),完成了高密度電法的二維有限元正演模擬程序,為后期多方法反演奠定了基礎(chǔ)。
Based on two - dimensional muti - classs continuous equlibrium assignment model , a new model using triangle finite element technique is proposed to solve the sensitivity analysis problem of regional transportation pivots 摘要在二維連續(xù)空間多類型平衡配流模型的基礎(chǔ)上,采用三角形單元有限元離散方法,建立了區(qū)域交通樞紐設(shè)施敏感性分析的一般模型,并給出了常用指標(biāo)的敏感性計(jì)算公式。
Application of structural optimization and nonlinear finite element technique to nonlinear multi - component structural system ( assembly ) is studied for the sake of the obturator of the breech mechanism of an automated mortar . the method and technology for optimizing nonlinear multi - component structural system with contact is mainly researched in this thesis 以某自動(dòng)迫擊炮炮閂閉氣結(jié)構(gòu)為背景,對(duì)結(jié)構(gòu)優(yōu)化與非線性有限元技術(shù)在多構(gòu)件非線性結(jié)構(gòu)(裝配體)系統(tǒng)中的應(yīng)用進(jìn)行研究,著重在對(duì)存在接觸關(guān)系的多構(gòu)件非線性結(jié)構(gòu)系統(tǒng)進(jìn)行優(yōu)化設(shè)計(jì)的方法和技術(shù)途徑方面進(jìn)行了研究和探索。
Different modals of sr motor are completely calculated and analyzed by using ansys in this paper . this paper also presents a detailed research on the stator mode shapes and natural frequencies of srm by use of 3d finite element technique , based on its real structural model for the first time . when the reseach conclusions is compared with the former results , a conclusion will be drawn , that is the rationality and approach to reality of the modeling are essential to the fe analysis of motor properties 應(yīng)用有限元軟件ansys對(duì)電機(jī)進(jìn)行了不同建模方法的模態(tài)分析與計(jì)算,并首次基于真實(shí)sr電機(jī)定子模型,用3d有限元方法研究了定子模態(tài)和固有頻率,從取得的一系列研究結(jié)論,與以前的研究成果進(jìn)行對(duì)比,可以得出結(jié)論:模型建立的合理性和逼近真實(shí)性對(duì)于電機(jī)各類性能的有限元分析至關(guān)重要,要得到盡量準(zhǔn)確的結(jié)果,必須建立盡量逼近實(shí)際的模型。
Firstly , finite element model of lathe spindle using finite element technique is established , and supporting bearings are treated as springs , unknown physical parameters and partial vibration displacement make up of new solving vector through using method of combination of academic modeling and experiment , mathematic model of solving stiffness of beating of lathe spindle is established using inverse analysis method of response problem finally 建立了機(jī)床主軸的有限元模型,將支承軸承簡化為支承彈簧,通過理論建模與實(shí)驗(yàn)相結(jié)合的辦法,將待識(shí)別的物理參數(shù)和部分振動(dòng)位移組成新的求解向量,利用響應(yīng)問題的逆分析方法建立了求解主軸軸承剛度的數(shù)學(xué)模型。
Research of numerial modelling of the damage initiation and extension during impact of composite laminated structures is briefly introduced , which includes damage criterions , the finite element techniques modelling failure damage initiation and propagation , and analysis of mechanical behaviours after impact 簡要介紹了復(fù)合材料層合結(jié)構(gòu)沖擊損傷破壞過程及沖擊后力學(xué)性能的數(shù)值模擬,包括各種破壞準(zhǔn)則、描述損傷破壞產(chǎn)生和擴(kuò)展過程的有限元方法及沖擊后力學(xué)性能的研究現(xiàn)狀。
The main popular theoretical method adopted to study end - plate connection is finite element technique under monotonic loading at present . this paper applies nonlinear ( material , geometry and contact ) finite element method to analyze the behaviors of connections under cyclic load at fist time . contact elements are set between end plate and column flange , screw cap and neighborhood plane , bolt bar and hole 對(duì)于端板連接的理論分析,目前國內(nèi)外的研究主要局限在單向加載有限元分析范疇,本文首次采用三維非線性(包括材料、幾何與狀態(tài)非線性)有限元對(duì)端板連接進(jìn)行了循環(huán)加載分析,端板與柱翼緣間、螺栓頭(帽)與相鄰板件間、螺栓桿與孔壁間都設(shè)置了反映邊界狀態(tài)的接觸單元。
Using three - dimensional finite element techniques , wave propagation theory , modals synthesis theory and numerical analysis methods , the vibration characteristics of steam turbine system are studied . according the structural features of practical blade discs , the 3 - d 8 - node element model is used because of its fitness to complex structures 本文采用三維有限元技術(shù)、波傳播理論、接觸分析、預(yù)應(yīng)力模態(tài)分析等數(shù)值分析方法,對(duì)汽輪機(jī)葉片?輪盤系統(tǒng)的振動(dòng)特性進(jìn)行了深入而較全面的分析研究。