虛位移 的英文怎麼說
中文拼音 [xūwèiyí]
虛位移
英文
virtual displacement-
Fist of all, on the basis of the research of agone boffins, this author investigates the interaction mechanism of bolts and rock, and introduces the elastic ? lastic analytical resolution which is consist of the liner structure, the equivalent reinforced wall rock and the original wall rock in the simple loading from the equivalent well - proportioned view ; this solution is very important meaning for the engineering design. on the basis of coulomb friction model, the author introduces the finite element equation of the contact problem in order to provide the academic foundation for the application of msc. marc. finally, combining the engineering practice of the non - linear analysis of shield tunnel through yellow river of the south - north water transfer and using the model of friction, the author researched the evolution law of stress and displacement field in the structure of grouted rock bolts, and analyzed the effect to the stress and deformation of surrounding rock mass due to anchor supports
首先，在前人研究成果的基礎上，對錨桿與圍巖的相互作用機理進行研究，利用全長錨固錨桿的中性點理論，從等效均化的角度來考慮錨桿對圍巖的加固作用，並推導了在簡單荷載作用下，含有襯砌、等效加固后的圍巖、原始圍巖三者的彈塑性解析解，對工程設計有著重要的參考意義；在數值模擬方面，以考慮錨固圍巖滿足規則化庫侖摩擦模型為基礎，利用虛功原理推導了接觸問題的有限元方程的計算格式，為開發運用大型商用有限元軟體msc . marc提供了理論根據，也形成了本文的理論基礎：最後，論文以南水北調東線穿黃隧洞穩定性分析項目為工程實例，利用本文所述的接觸問題的摩擦模型理論，對錨桿支護結構的應力場、位移場的變化規律進行了研究，分析了加錨支護對隧洞圍巖應力、變形的影響。They are studied that the nonlinear problem and un - determinate problem of virtual displacement in nonholonomic system in the second chapter. in chapter 3, they are studied that chetaev model and vacco model in nonholonomic system. a unified form of hamilton principle in intrinsical linear nonholonomic system is studied in chapter 4
第一章對非完整動力學研究的有關現狀進行了綜合評述；第二章研究了非完整系統虛位移關系的不定性問題與非線性問題；第三章比較研究了一般非完整系統的chetaev模型和vacco模型；第四章研究了本質線性非完整系統的hamilton原理；第五章給出了本文的結論與有關研究的展望。The virtual displacement method specifies that the sum of the shaded areas is equal to the sum of the stippled areas.
虛位移法規定陰影面積之和等於點畫面積之和。Let the junction of the three fracture lines have a virtual displacement.
令三條折斷線的相交處有一虛位移。We recall that the principle of virtual displacements is a statement of equilibrium.
前面已敘述過，虛位移原理是對平衡的一種描述。Principle of virtual displacement
虛位移原理This dissertation studies the problem of dynamics modeling, dynamical response, and distribution of moving mass for a re - entry vehicle ( mmcrv ) under the background of national natural science fund project “ precision control and guidance for moving mass control of a re - entry vehicle based on the virtual displacement concept ”
本論文以國家自然科學基金項目「基於虛位移概念的變質心再入飛行器精確制導問題研究」為背景，研究基於變質心控制的再入體動力學建模、動力學響應和落點分佈等問題。The rational spectrums of all kinds of virtual displacement definitions and commutativity of d, ? operations are given and testified in this paper. the research methods of intrinsical linear nonholonomic dynamics are similar to those of holonomic dynamics. the rationality and equivalence of chetaev model and vacco model in the intrinsical linear nonholonomic system are testified from the mathematic and mechanical aspects
本文研究了非完整動力學中使不定性問題確定化的交換關系和將非線性問題線性化的虛位移定義，首次證明並給出了在非完系統中各種虛位移定義與交換關系的合理適用范圍，指出完整動力學與本質線性非完整動力學在研究方法上具有相同性。Based upon virtual displacement method and the updated - lagrangian approach, stiffness matrices for two - dimensional elastic - plastic beam model in large displacement were proposed, in the derivation of which transverse stress was included because it was believed that part of the 2nd order effects of various stresses, which are in equilibrium with each other and with the external loads, will counteract each other and neglecting either part would possibly lead to incorrect results
利用虛位移原理和更新的拉格朗日方法，導出了大位移彈塑性梁單元剛度矩陣的顯式表達式，在剛度矩陣推導中引入了截面內非線性剪應力和橫向應力的影響，剛度矩陣通過了剛體檢驗。之所以要引入橫向應力的影響，是因為本文認為，保持平衡所需的所有應力，它們各自的二階效應會相互抵消，因此忽略其中的任何一項都可能導致不正確的結果。This paper employs the dynamic - static force principle to simplify the mathematical models, and employs the virtual - displacement principle and adopts the sor digital algorism to extract the dynamical performances. the solutions extracted is coincidental with the practical situations
本論文應用了達朗貝爾原理簡化數學模型，並應用虛位移原理和sor迭代法求解機構的動力特性，求得的模擬曲線與實際情況比較吻合。By taking advantages of epipolar line features and depth discontinuities in reference 中國科學院 軟件 研究所 博士 學位 論文 基于 圖 象 的 快速 繪制 技術 的 研究 images ， an efficient inverse wmping algorithm is pfoposed in chapter 3 for gcnerating nagcs of novel views by combining multiple eference images 帆 enhm different vie 呷 oints because continuous segnents determi 。 d by pairs ofedge pixels at co 。 spending epipolar lines are order kept ， only pairs of edge pixels in the reference 渝 明 e e necess 叨 口 cowute to obtain generalized disparity of all points in the desired image as a result ， sighficant acceleraion could be made in the endering pfo 比 鴕 two accelerating techiq 此 s e presented in this algori 山 mb accelerate the hole illing process his algorithm extends the reference images rom projection of single col ： ii ’ ected surface in previously developed nvnverse w 出 下 er to ima 驢 s captured rom complex scene in chapter 4 ， an 《 dent ibr method is prese 庇 仙 y takn ull 訕 antage of 呷 bies c 咖 the method can simulate the 3d details on sllri ： ace of object successfully he 。 叩 proach ， called rered ature mopmp consists of two pans at fst ， an origi 。 ltexture with orthogonal displacements per pixel is deco 啊 osed into a series of new t6 刀 mfcs with each 他 lug a given displacement per pixel ， called ae ， ea atures ， or lt hen hese lt e used to render the novel view by conventional texture mapping d avoid gaps n the endered hlla 驢 ， some phels are to be interpolated nd extended in the 廠 kaccoding to the depth differe eee between two neighbor pixels in the original texture as these ltlt fc … e much storage nd therefore much time is equired to install ltlt into the text ’ ufc buffec an 舊 thod is pfoposed to co 呷 fcss the ltlt ， nd the cottcspondingfclldering method is given experimental esults show that the new method is efficient ， especially n rendering those objects with a smaller depth rnge compared withtheir size ， such as relief surfaces of building
與己有的三維變換方法相比較，該方法不但成功地填補了由於投影區域擴張而產生的第一類空洞，而且成功地填補了由於空間深度非連續物體相互遮擋而產生的第二類空洞，從而方便地實現了虛擬環境中的漫遊；基於物體表面深度的連續性，本文提出了一個位移預測方法? ?此方法可以從單幅參考圖象獲得逆映射過程中所需要的目標圖象的位移信息，從而大大提高了演算法的效率：與通常的正向映射演算法相比，此演算法克服了多幅參考圖象所帶來的計算量成倍增長等問題，而且誤差較小。 2 ）基於極線幾何的快速逆映射演算法。利用參考圖象的邊界信息與隱含的遮擋關系，以及極線幾何的性質，本文第三章提出了一個基於極線幾何的快速3 『一中國科學院軟體研究所博士學位論文基於圖象的快速繪制技術的研究逆映射演算法，從多幅參考圖象精確合成當前視點目標圖象。The base is divided into finite block element. so, the stress and load that this system divided can be calculated. combining analyzing morrow point dam on colorado river with this method, the rationality of it is validated
應用上述方法，結合morrowpoint雙曲拱壩，計算了該壩的分載與徑向位移，其成果合理，驗證了本文建立的壩體虛擬彈性地基梁與壩基塊體有限元組合的拱壩分載法的合理性，且滿足工程精度的要求，有一定的實用價值。( 2 ) to determine the worst load case accurately and quickly, influence faces of main sections are plotted < > ( 3 ) combining the influence face with the pre - reinforcement space fe model, the internal force and the stability are computed, then the main reasons of the disease are analyzed
（ 2 ）為準確快速地確定最不利荷載工況，運用虛位移原理和邊界元相結合的新方法，繪制了主要檢算截面的內力影響面。 （ 3 ）應用空間有限元模型，結合內力影響面，對加固前進行內力和穩定性計算，分析其主要的病害原因。Abstract : this article deduces the calculation formulation of jointless - track ' s stability using the theorem of bogus - locomotion, and calculates the influences of the changes of various parameters on jointless - track ' s stability and suggests some important principles of keeping jointless - track ' s stability in the process of maintaining jointless - track
文摘:利用虛位移原理推導了無縫線路穩定的公式，計算了各種參數的變化對無縫線路穩定的影響，提出了在線路養護工作中保證穩定的一些重要原則。In the majority of application, either the force field or the displacement field is imaginary.
在多數應用中，不是力場就是位移場總有一個是虛設的。In the majority of applications either the force field or the displacement field is imaginary.
在多數的應用中，不是力場就是位移場總有一個是虛設的。In the paper, based on the method of low pair replacing with high pair, the problem of cam design was transferred to that of linkage design. by means of rotary unit vectors, the equations of displacement, velocity and acceleration of the replacement mechanisms were developed. and then, the virtual linkage ' s length and direction were deduced
論文基於高副低代原理，將平面凸輪機構設計與再現函數的平面連桿機構設計統一為同一種方法，運用圓向量函數建立代換機構的位移、速度、加速度矢量方程式，求取虛擬連桿桿長和方向，由此展開凸輪理論廓線、實際廓線、曲率半徑和壓力角的求解，並得出用圓形刀具加工凸輪時刀具中心的軌跡方程。On the basis of large - displacement virtual principle, the finite element equations of stable type suspension bridge containing towers are driven. the stiffness matrixes of the cable element, the bar element and the beam element using node coordinates are given, too. such method has not been found in reference books
論文從有限位移彈性理論的虛功方程出發，推導出穩定橋全橋結構的非線性有限元運動方程，還推導了用節點坐標表示的索單元、桿單元和梁單元的單元剛度矩陣，這一點在參考文獻較少見。Then each. cable - strut - membrane unit is analyzed by adopt the non - linear finite element analytical method. according to virtual work principle, the equation of solving is formed, from the timid displacement principle, derive and happen to ask the equation of solving. through the whole n - r method, cooperative form - finding of the cable - strut - membrane structure will be realized
然後，採用非線性有限元分析方法，對各個單元進行分析，由虛位移原理，推導出求解方程，通過全n - r法迭代，實現索桿膜結構的協同找形。By means of computing it makes clear that this way is simple, and if you make out the non - polar velocity diagram of planer rigid - body system, you may determine speedily the relations of the imaginary displacement, and moreover it brings about a new way to determine the imaginary displacements of planer rigid - body system
算例表明，該方法簡單，而且只要作出平面剛體體系的無極速度圖，便可快速地確定該體系的虛位移關系；同時，該方法也為平面剛體體系虛位移關系的確定提供了一條新途徑。分享友人