finite boundary 中文意思是什麼
finite boundary
解釋
有限介（界）面-
For a class of quadratic finite element diseretization systems of an elliptic boundary problem with jump coefficients under the unstructured quadrilateral grids, we are concerned with two kinds of quadratic lagrangian finite element equations, by analyzing the relationship between the linear finite element and quadratic finite element basis functions, a hew amg method is designed
摘要針對一類帶間斷系數的橢圓邊值問題，在非結構四邊形剖分下，討論了兩種二次拉格朗日有限元方程的代數多重網格法，通過利用雙線性元和二次元基函數之間的表示關系，給出了一種新的網格粗化演算法和構造提升運算元的代數途徑。 -
Introducing the theory and application of boundary element method on the sound radiation, giving the process of solving vibration noise radiation problem using boundary element analysis software ; presenting the coupling theory and the combination analysis of finite element method and boundary element method, and doing relevant analysis based on close drum shell ; programming the noise data simulation program using the numerical calculation software, simulating the acoustic and pressure data of a key point in the transient response acoustic field of the close drum shell, realizing the audibility of the noise, using the virtual reality tools to simulate the vibration noise of the drum shell ; combining the finite element method and boundary element method to analyze the vibration noise radiation of some gear box, and completing the whole simulation process of the vibration noise of the gear box
綜合介紹了邊界元法在聲輻射問題上的理論及應用；並給出了運用邊界元法分析軟體求解振動聲輻射問題的過程。闡述了有限元法和邊界元法的耦合理論及組合分析方法，並以封閉鼓形薄殼為分析對象進行了相應的分析。利用數字計算軟體編制了噪聲數據模擬程序，並模擬了通過組合方法分析封閉鼓形薄殼瞬態響應聲場而獲得一關鍵點的聲壓數據，實現聲音的可聽化，隨后通過虛擬現實工具實現了該情形下橢球殼振動噪聲的虛擬模擬。 -
Due to nonlinear bottom boundary condition, the generation of internal tides over finite topography can only be deal with by using of ray - tracing method beforetime. the transforms introduced in this dissertation make it possible use eigenvalue method to investigate the generation of internal tides over finite topographies
由於非線性邊界條件的使用，前人處理有限地形上內潮的產生問題只能求助於射線理論，本文提出的坐標變換將若干海底地形變換成平底，從而使得利用特徵值方法研究這些地形上的內潮生成問題成為可能。 -
And the explicit finite difference method, the combining method of the central difference method and newmark s constant average acceleration method, and the transmitting boundary are used. by comparing the acceleration determined by the several methods of the displacements or velocities, a computing method of acceleration employed the one side difference of velocity is more practicality in this research. corresponding to normal incidence of the body waves, p waves or svwaves, and rayleigh surface waves, two two - dimensional finite difference programs are compiled to compu te the dynamic response of two - phase media
以土力學模型為基礎，利用以土骨架和孔隙流體的四個位移為基本未知量的數值方法去模擬二維飽水介質中的地震波傳播，採用了顯式差分方法（中心差分法和newmark常平均加速度法結合）和透射邊界，通過比較利用幾種差分格式求解的加速度結果，發現一種用速度單邊差分求解加速度的方法在本文研究中較為實用，分別編制了體波（ p波或sv波） 、 rayleigh面波輸入時求解兩相介質動力響應的兩個二維數值分析程序。 -
Using the split steps finite element method, the varied - boundary two - dimensional numerical model of diurnal tide and tidal current in the luoyuan bay is constructed
摘要採用不規則三角形網格的分步雜交法，建立羅源灣海域二維變邊界全日潮汐和潮流數值模型。 -
Road wheel in this paper is created according to gb / t 3487 - 1996 and application of load is simulated the actual situation. msc. patran finished is used to build model of road wheel, divide finite element graticule, apply boundary load, and define material properties, which are submitted to msc. nastran to analyze strength
本文所使用的車輪是按照輪輞的國家標準而構建的，而載荷的加入是模擬實際情況而添加的，在此基礎上，運用msc . patran ，完成車輪幾何建模，有限元網格劃分，邊界載荷的加入，材料特性的定義，再提交到msc . nastran中進行強度分析。 -
Road wheel in this paper is created according to gb / t 3487 - 1996 and application of load is simulated the actual situation. ansys finished is used to build model of road wheel, divide finite element graticule, apply boundary load, and define material properties, which are submitted to ansys to analyze strength
在車輪的構建上，本文採用了三維繪圖軟體ug ，在ug中首先完成車輪幾何建模，然後導入到ansys裏面進行修改並進行有限元網格的劃分，邊界載荷的加入，材料特性的定義，對車輪進行強度分析。 -
There are three sections in this paper. the first section : we consider the initial boundary value problem on half line and bounded interval, with kato ' s method for abstract quasi - linear evolution equations and a prior estimates of. solution, we get the existence of global smooth solution and the blow - up of solution in finite time under some conditions
第一部分：考慮了camassa ? holm方程在半無界和有界區域上的初邊值問題，用kato關于擬線性演化方程的初值問題的理論及先驗估計的方法，證明了整體解的存在性，及在一定條件下，解在有限時間內的blow ? up 。 -
At first the finite element theory for temperature analysis is introduced, and then mainly discussed the calculation models of cement hydration heat and the boundary condition under sun radiation
首先對這一方法的基本原理進行了簡要的介紹，著重探討了計算中的水化熱計算模型、日照邊界條件處理等。 -
The study indicate that the surface form has no effect on kl, but has obvious effect on kll, and will affect the breaking angle and mode ; in finite plate, the boundary condition has effect on the sif and the k is bigger than in infinite plate ; the effect of the distance and the angle between cracks are all have obvious effects on the multiple crack interaction, and the interactions between cracks also have obvious effects on the sif, which can be neglect only when the distance is bigger enough
研究表明：裂面狀態對k _的大小沒有影響，而對k _的影響卻很大，相同應力條件下，裂面狀態會影響裂紋的開裂角和開裂方式；有限板的邊界對應力強度因子有一定的影響，其k比無限板中的k略大；裂紋間的距離、夾角等因素對裂紋間的干涉效應均有較大影響，裂紋間的干涉效應對應力強度因子的影響非常顯著，只有當裂紋間的距離充分大時，干涉效應才可忽略。 -
Consequently, on the basis of non - winkler foundation model, a finite - element method that utilizes foundation flexibility matrix into iterative calculation is proposed in this paper originated from the item " the optimal design theory and research of pile capping beam " sponsored by natural science fund of hunan province, which the continuity of soil mass can be accounted for under various boundary conditions, different loadings and irregular beam characters
本文結合湖南省自然科學基金項目「樁基承臺梁優化設計理論與方法研究」 ，針對非文克爾地基（半空間、線性變形層或單向壓縮層地基模型等）上的樁基承臺梁，提出一種利用地基柔度矩陣來進行迭代的有限單元法，可充分考慮梁下土體的連續性，並對基礎與土體脫開、承臺梁截面變化、梁體邊界條件復雜、上部荷載類型變化以及梁下基樁承載力差異等情況進行分析計算。 -
In this paper, the bend stress of engine crankshaft was analyzed by the finite element method ( fem ). an one - fouth crankthrow fe model is used to analyze it taking different boundary conditions into account
本文用有限元法計算分析了發動機曲軸的彎曲應力。採用1 4曲拐有限元模型對不同邊界條件進行了研究，計算了安全系數。 -
To draw this boundary, physicists and mathematicians use a distorted length scale similar to escher ' s, squeezing an infinite distance into a finite one
為了畫出這個邊界，物理學家和數學家利用了類似於艾雪所用的扭曲尺度，將無窮大的距離壓縮成有限的長度。 -
The markov chains ' analysis results show that the expected casualty of the former form is the same as one of the latter form at unknown or infinite mine - field boundary, the expected casualty of the former form is less than one of the latter form at known or finite mine - field boundary
根據馬爾可夫過程理論的分析，可以比較出2種清掃模式下掃雷艇期望損失在雷區邊界未知或無限時是相同的，而對邊界已知的有限雷區，邊緣漸進模式的期望損失比中心航道模式小。 -
The numerical algorithm of solving the adjoint equations for different design cases have been developed by using finite volume methodology which is usually used to solve the flow governed equation. it includes the some important aspects, such as flux formulation, wall and far - field boundary treatment methodology, dissipative term formulation, etc. after the solution of the adjoint equations is obtained, the derivatives of the cost function with respect to all the design variables can be evaluated with the same operation. this can yields a significant saving over the other gradient - based techniques when there are many design variables
（ 3 ）進行了應用控制理論和三維歐拉方程的機翼氣動反設計研究，以及有升力約束情形下機翼跨音速減阻問題研究，分別推導了相應的共軛方程及邊界條件數學表達形式，研究與發展了三維共軛方程的有限體積數值求解方法，及相應梯度公式的數值求解方法，通過對計算網格生成、流場計算、共軛方程數值求解、梯度求解和優化演算法等多方面的有效結合，成功發展了三維機翼的氣動反設計和跨音速減阻優化設計程序，成功地進行了多個設計算例研究。 -
( 3 ) temperature field and residual capacity of reinforced concrete member after fire studied by the numbers, various boundary conditions of heat exchange equation and the solutions of them given an account, the formulae of the residual capacity of the members after fire established, the program of temperature field programmed on the basic of finite difference algorithm, a case given to demonstrate
（ 3 ）對火災后構件溫度場的分佈和剩餘承載力的計算進行了系統地分析和研究。討論了熱傳導方程的各種邊界條件及相應的解法，建立了不同構件的剩餘承載力計算公式，並結合工程實例用有限差分法編制了相應的溫度場計算程序，與實例吻合良好。 -
According to actual situation of production wells, external boundary conditions and coupled inner boundary conditions between welibore and adjacent rocks, welibore and production zones, adjacent rocks and production zones are constructed, and an alternate direction implicit finite difference algorithm ( adi ) is used to solve temperature models
根據生產井的實際情況，構建起外邊界條件以及井筒與圍巖、井筒與產層、圍巖與產層之間的耦合內邊界條件，採用交替方向半隱式有限差分方法（ adi方法）求解所建立的井下溫度場模型。 -
The novel three - dimensional finite - difference approximations of mur ' s absorbing boundary conditions are also presented in frequency - domain. then the ddm based on fdfd is investigated in the applications of three - dimensional electromagnetics problems. and it is used to analyze the leaky wave antenna based on image nonradiative dielectric ( nrd ) guide
最後，闡述了maxwell方程組和劃分區域的despres傳輸條件的頻域差分格式建立，在截斷邊界上構造了三維頻域mur條件的差分近似，探討了基於頻域有限差分的區域分解法在三維電磁問題中的應用實現，並將該演算法用於分析一種基於nrd波導結構的漏波天線。 -
In this thesis, the construction and monitoring general method of cable replacement work for qianwei minjiang river cable - stayed bridge is introduced firstly, then, using large - scale commercial finite elements analysis software, algor, a space solid model is developed. in order to give attention to internal force and deformation, the thesis simulates the factual situation of the bridge by adding boundary elements. the analyzed items include : cable forces, deflections, stress of box - girder and maximum horizontal deformation of tower under different cable - replacement cases, which can be used to tutor design and construction for other similar works
本文以犍為岷江大橋換索工程為背景，首先介紹了該橋換索施工與監控工作的大致情況，並應用大型商業有限元軟體algor建立了該橋空間計算模型，建模過程中為了真實地模擬結構換索前的內力狀態，實現內力與線形兼顧，本文使用了「添加邊界元還原結構內力」的方法。 -
In this paper, temperature distributions of buried cable were analyzed according to the knowledge of heat transfer, after constructing heat conduction equation and boundary condition, temperature distributions were calculated with the finite element method in which the grids divided into a triangle format
摘要結合傳熱學知識對地下直埋電纜溫度場進行分析，構造出熱傳導方程和邊界條件后利用有限元法計算了地下電纜的溫度場分佈，計算區域採用三角形單元剖分法。
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