finite changes 中文意思是什麼

Chapter 4 time - dependent computational simulation of the response of cable - suspension feed system in gusty wind based on the time - independent structure finite element method, and with consideration of the movement laws of cabin, a 3 - d time - dependent structure finite element model formulated by a new method named iss method ( instantaneous structure supposition method ) to deal with the vibration response of cable - suspension feed system in gusty wind is presented. in the model, all sources of geometric non - linearity, cable sag and changes of cable geometry due to large displacement, are fully considered

基於時不變結構的有限單元法，在綜合考慮饋源艙運動規律的基礎上，提出了時變系統的瞬時結構假定法，通過將懸索離散為索桿單元，建立了系統的時變有限元模型，該模型充分考慮了懸索的垂度和大變形等幾何非線性因素，應用ne 。

Then the isoparametric finite - difference three - dimensional transient groundwater numerical model is presented. visual modflow, the most popular standard visualization software package approved by the hydraulic scientists and technicians on simulating the groundwater flow is used to simulate and calibrate the groundwater level and quantity of the research area. at last, the changes of the hydraulic head and the produced quantity in the future were predicted according to the tested parameter and the modified model

在水文地質概念模型的基礎上，進一步建立了研究區完整的三維有限差分非穩定流數學模型，利用目前國際上最盛行，且被各國同行一致認可的三維地下水流模擬軟體? ? visualmodflow對該區地下水的水位和水量進行模擬求解，最後，利用識別的參數和驗證后的模型預測了今後的水位變化趨勢和可開采量。

And for geometrically split link, sharp integrality of the ohtsuki invariant is given. a new multiplicative group, braid array, is constructed through a series of basic changes in the second part, and we conclude that any tame knot or link can be represented by finite braid array

第二部分，由於辮子群與紐結理論的密切聯系，本文構造了一個類似於矩陣的乘法群? ?辮子陣群，並給出了它的一系列基本變換，且得到所有溫良紐結或環鏈都可由有限階辮子陣惟一表示。

The paper applies ansys finite program to analyse coalstore - shale fired perforated brick ' s hole shape, and finds the factors that influence the strength of bricks. the author attempts to explore from the basic principle of heat transfer the effect of the changes of hole arrangements and hole ratios of the perforated ( hollow ) brick in certain dimensions on the thermal transition of the brick, and to improve the thermal insulation property of the brick on this basis

通過ansys有限元應用軟體對不同孔型、不同孔排列的多孔磚進行力學性能分析，找出影響多孔磚力學性能的因素；探討了在一定尺寸條件下，多孔磚、空心磚的孔洞排列與孔洞率的變化對磚體傳熱性能的影響，以此改善磚體的抗壓強度和隔熱保溫性能。

Finally, the finite element software ansys is used to analyze the stress of missile connecting mechanism in critical moments, which displays the inner load changes with the outer force

最後，應用有限元分析軟體對重要環節的導彈連接機構進行了應力分析，體現出外力變化時的內部載荷響應。

This software can be used to construct automatically 16 electrodes and 32 electrical electrodes finite element method ( fem ) division model. the equi - potential lines in any drive pattern can be plotted and the boundary potential changes in its forward problem can be obtained. using back projection method, the impedance imaging in simulation and real measurement can be reconstructed

該軟體對任意形狀、結構的場域可實現自動剖分，可建立16電極、 32電極求解模型；正問題部分可給出各種激勵情況下的等位線分佈和邊界電位變化情況；逆問題部分用反投影法實現了圖像重構，並成功應用於所研製的測試系統。

The simulation methods and content about the mesh generation, the boundary condition of rotating wheels and moving ground of single car, and about the steady study on the two car running in row and overtaking process has shown the calculation results reliability and the numerical simulation methods feasibility. based on the comparison and analysis of mesh strategy, the descartes mesh strategy and the tetrahedron + prism mesh strategy are chosen. the continuous unsteady overtaking process of the vehicles, traveling with constant but unequal speed is replaced by a finite numerber of steps ; in each the relative position of both vehicles changes

最後利用滑動交接面技術和動網格技術進行了瞬態的轎車超過某國產大型運輸車的數值模擬研究，在此之前國內外對此項技術均未有系統的研究和可借鑒的結論，以側向間距0 . 5倍轎車車寬為典型，用定性和定量兩種方法對比分析了超車過程中的轎車和運輸車與其單車情況及前文穩態模擬的異同，並將六種側向間距的瞬態結果與單車情況和穩態模擬結果進行了對比分析。

To investigate the effect of different laminar cooling patterns on the microstructure and mechanical properties of plates in rolling process, the changes in temperature and microstructure of plate in such cooling process were calculated simulatively by coupling finite difference method with microstructural evolution models, thus predicting the ferrite grain size and phase composition under different cooling patterns

摘要為了研究層流冷卻方式對中厚板組織和性能的影響，用耦合有限差分和微觀組織演變模型模擬計算了中厚板層流冷卻過程中的溫度和組織變化，預測出了不同冷卻方式下的鐵素體晶粒尺寸和相組成。

Under the horizontal earthquake action and wind force, aim at " the pure frame structure with rectangle columns ", " the pure frame structure with special - shaped columns ", " the frame - truss structure with special - shaped columns " and " frame - shear wall structure with special - shaped columns ", earthquake action analysis was done by the spacial finite element method through the changes structural parameter. analyzing systematically " structure vibration mode ", " vibration period ", " structure lateral rigidity ", " seismic action force ", " seismic response force ", " floor seismic shear force ", " lateral horizontal displacement of structure " and " members internal force ". results indicate : ( 1 ) based on equal area, the special - shaped columns replaced the rectangle columns, the structural lateral rigidity enlarges, the lateral displacement minishes obviously, the earthquake response increase slightly, the biggest increasing amount of frame columns axis - compress ratio is smaller than 0. 08. the whole aseismic performance of structure has improved ; ( 2 ) when the section ' s length and section ' s thickness ratio of special - shaped columns is smaller than 3. 6, the structure benefits to resist seismic action ; ( 3 ) the angle of horizontal seismic action with the whole coordinate is 0 degree, structure earthquake response is bigger, belonging to a control factor of structure aseismic design ; ( 4 ) the frame - truss structure with special - shaped columns and the " a " - brace has the biggest lateral rigidity ; ( 5 ) the frame - shear wall structure with special - shaped columns have bigger lateral rigidity and smaller displacement, members internal force enlarged just rightly, have much superiority of resisting seismic action ; ( 6 ) in the higher seismic fortification criterion region ( 8 degree of seismic fortification intensity ), aseismic disadvantageous building site ( iii type site ), adopting special - shaped columns structure system, should reduce possibly the building ' s self - weight in order to reduce the earthquake response ; ( 7 ) the response spectrum method of computing seismic response and the time - history analysis method have similar analysis result

西安理工大學碩士學位論文在水平地震作用下，並考慮風荷載組合，分別對「矩形柱純框架結構」 、 「異型柱純框架結構」 、 「異型柱框一析架結構」及「異型柱框-剪結構」等四種結構體系，通過改變結構參數，運用空間有限元方法，進行地震作用計算。系統地分析研究「結構振型」 、 「振動周期」 、 「結構側向剛度」 、 「結構地震反應力」 、 「樓層地震剪力」 、 「結構側向位移」 、 「層間位移角」 ，以及「構件內力」 。結果表明:在等面積原則下，異型柱代換矩形柱后，結構剛度增大，側向位移明顯減小，地震反應力略有增加，框架柱軸壓比最大增幅小於8 % ，結構整體抗震性能有所提高;當異型柱肢長肢厚比小於等於3 . 6時，結構有利於抗震;水平地震作用力與整體坐標夾角為0度時，結構地震作用效應較大，屬結構設計的控制因素之一;異型柱框一析架結構採用「人」字斜撐，側向剛度大於「八」字斜撐和「人一八」字混合斜撐;異型柱框一剪結構側向剛度大、位移小，構件內力增大適中，是一種抗震性能優越的結構體系:在抗震設防烈度較高地區（ 8度）和抗震不利的建築場地（ m類場地） ，採用異型柱結構體系時，應盡可能減輕結構自重，降低地震作用力;分別採用「振型分解反應譜」法和「時程分析」法進行地震作用計算，兩種方法所得結果基本一致。

3. by using the techniques of an explicit criterion to determine the number of real roots of a univariate polynomial in ( [ 13 ], [ 73 ] ) ; b - net form of bivariate splines function ; discriminant sequence of polynomial ( cf. [ 13 ], [ 73 ] ) and the number of sign changes in the sequence of coefficients of the highest degree terms of sturm sequence, this paper determines the number of real intersection points two piecewise algebraic curves whose common points are finite. a lower bound of the number of real intersection points is obtained in terms of method of rotation degree of vector field

大連理工大學博士論義：分片代數價線i片代數簇的若十m穴3 ：利用楊路，張景中，侯曉榮在文獻v13 ， 73 ）中關於一元多項式實根的顯式判準，以及二元樣條函數的b網形式，多項式的判別序列和sturm序列的最高次數項系數序列的變號數，本文給出了兩個分片代數曲線的丈交點數（假設公共點是有限的）的計算公式。

The coupled turbulent flow field and temperature field are simulated by finite element method ; the influence of casting speed on the turbulent flow field and temperature field in the melting bath and the interaction between those two field are analyzed ; the variation tendency of the heat flux intensity between the melting bath and casting roll and law of variation with changes of casting speed in the process of solidification are given ; a comparison between the simulation results and experimental results demonstrates their good agreement ; and the mechanism of the heat flux variation is identified by analysis on the temporature gradient and development of solidification within the melting bath and its influence on the variation of the heat flux intensity

採用有限元法模擬了雙輥鑄軋不銹鋼過程的流熱耦合問題;分析了鑄軋速度對熔池內流場、溫度場的影響以及流場與溫度場之間的相互影響;給出了凝固過程中熔池與鑄軋輥之間的熱流密度變化趨勢及隨鑄軋速度的變化規律，並把此模擬的結果與試驗的結果相比較，吻合較好;通過熔池內溫度場及溫度梯度分析了熔池內凝固的發展及其對熱流密度變化的影響。

This paper sets about studying room - temperature fracture mechanisms of tial - based alloys of fully lamellar and duplex microstructures through the measurements of mechanical properties, in - situ observations of fracture surfaces and finite element method ( fem ) calculations, the measurement of macro - parameters, the observations of fracture surface and fem calculations on notch specimens ( 4pb ) and pre - crack specimens ( 3pb ), detailed observations of configuration changes at pre - crack tips in metallographic cross sections of specimens unloaded at various applied loads and fem calculation

本文通過光滑試件機械性能的測定，原位拉伸試件的表面觀察、相應的斷口觀察及有限元計算；缺口彎曲宏觀參數的測定、斷口觀察及其有限元計算；裂紋彎曲參數的測定、裂紋卸載試樣剖面的觀察及其有限元模擬與計算研究了tial基合金全層組織和雙態組織的室溫斷裂機理。

Taking the long span continuous rigid - frame structure of the south bank approach spans of wuhan tianxingzhou changjiang river bridge as the research object, and using the large scale finite element analysis program ansys and two ways of modeling with solid element and spatial beam element, this paper respectively analyzes the dynamic characteristics of the rigid - frame structure of the approach spans, makes a study of the influences of rigidity changes and bearings failure of the thin - wall piers on the dynamic characteristics of the structure of the approach spans and also compares the results of numerical analysis of the two kinds of modeling

摘要以武漢天興洲長江大橋南岸引橋大跨度連續剛構為研究對象，運用大型有限元分析程序ansys ，採用實體模型與空間梁單元兩種建模方式，分別分析了其動力特性，探討了薄壁墩的剛度變化與支座失效對其動力性能的影響，並對兩種模型的數值分析結果進行了比較。

Abstract : after the relationship between radial and tangential strains and resistance changes of strain gage on the surface of elasticity pressure sensor is established by finite element method, the output voltage is related to the resistance changes in the electrical bridge, and the nonlinear precision of this kind of pressure sensor is analyzed

文摘:本文用有限元方法分析平膜片式壓力傳感器彈性元件表面徑向應變及切向應變與薄膜應變片阻值變化的聯系后，根據電橋原理得到與其輸出電壓之間的關系，最終並分析了傳感器之非線性精度

All concrete structures are exposed to volume changes caused by hydration reactions in the early age. if the volume changes are restrained, stresses is generated which will cause cracking when it overcomes the tensile strength. as the mechanical properties of early age concrete vary with time, especially the creep degree depends on the time elapsed and the time at loading, to calculate the stress of concrete structure is a complex nonlinear problem. the finite element method ( fem ) can take account of the evolution of the stiffness properties, the development of thermal strain, creep, shrinkage and so on. in this paper, a general approach for numerically simulating this type of behaviour is presented firstly. then, how to solve this problem is introduced by the general finite element software ansys using the initial stress method. finally, a detailed description of an example calculation that demonstrates the potential of the numerical simulation strategy follows

早期混凝土由於水化反應都會產生體積變化.如果體積變形受到約束就會產生應力，一旦超過混凝土的抗拉強度就會產生裂縫.由於早期混凝土的力學性能是隨時間變化的，特別是徐變，它不僅與加載時間有關而且同時隨齡期而變化，因此計算早期混凝土結構應力是較為復雜的問題.有限單元法不僅可以考慮混凝土剛度的變化，而且可以考慮溫度、徐變、收縮等因素.本文利用初應力法對通用有限元軟體ansys進行了二次開發，通過工程實例計算了高層建築地下室側墻早期混凝土應力的變化過程，並提出了相應的抗裂措施

Although, this is such a world which is flooded with temptations, changes and uncertainty ; although, mundane and finite lives are filled with various misfortune and limitation ; although, living is full of the time of countless hardship, frustration, pain and trial ; for us who walk together in such way, i am sure, our bodies would have something to depend on, our spirit would have somewhere to cling to, our pain could be stood somewhat or more, our lives could have some satisfaction, our hearts could taste some peace, and our souls could feel comfort more or less

雖然，這是一個充溢著誘惑、變化和不確定性的世界；雖然，凡俗的、有限的人生充滿了各種不幸和缺陷；雖然，生活中充斥著無數的艱難、挫折、痛苦和考驗的時刻；但這樣走到一起的你和我，我堅信，我們的凡軀會有所寄託，我們的精神會有所附著，我們的痛苦會有所忍受，我們的人生會有所滿足，我們的心靈會有所寧靜，我們的靈魂會有所安慰。

Under finite size of neuronal membrane, the transmembrane potential will fluctuate due to the random changes of conformational state of ion channels embedded in the membrane

在考慮有限大小膜面積時，神經元系統由於膜上通道的隨機開關而使神經元本身具有了隨機性。

In this dissertation, area geology background, engineering geology condition and mechanism of deformation - destruction of the landslide are adequately analyzed, and finite element method is applied to analyzing the landslide stability in the study area, then changes of stress field, displacement field, plasticity destruction zone and stability coefficient contour are discussed

論文充分分析了巫山縣四道溝滑坡的區域地質背景、工程地質狀況，系統分析了滑坡的變形破壞機理，採用有限元法進行了滑坡穩定性分析，討論了在各種工程情況下的應力場、位移場、塑性破壞區以及穩定性系數等值線圖的變化情況。