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)與計算機技術(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算軟件ansys對無限水域中壓電彈性材料復(fù)合層球殼的聲波反射進行了數(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 以某自動迫擊炮炮閂閉氣結(jié)構(gòu)為背景,對結(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)用進行研究,著重在對存在接觸關(guān)系的多構(gòu)件非線性結(jié)構(gòu)系統(tǒng)進行優(yōu)化設(shè)計的方法和技術(shù)途徑方面進行了研究和探索。
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對電機進行了不同建模方法的模態(tài)分析與計算,并首次基于真實sr電機定子模型,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行對比,可以得出結(jié)論:模型建立的合理性和逼近真實性對于電機各類性能的有限元分析至關(guān)重要,要得到盡量準確的結(jié)果,必須建立盡量逼近實際的模型。
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,通過理論建模與實驗相結(jié)合的辦法,將待識別的物理參數(shù)和部分振動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,包括各種破壞準則、描述損傷破壞產(chǎn)生和擴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)有限元對端板連接進行了循環(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,對汽輪機葉片?輪盤系統(tǒng)的振動特性進行了深入而較全面的分析研究。