computational element 中文意思是什麼

computational element 解釋
計算單元
  • computational : adj. 計算的。
  • element : n 1 要素；成分；（構成）部分；分子。2 【化學】元素；【數學】元，素；【機械工程】單元；單體；【無...
  1. 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 。
  2. The natural element method and its computational algorithms in three dimensions

    自然單元法原理與三維演算法實現
  3. By means of area method and stress field intensity approach and computational analysis of finite element, the fatigue strength of misaligned welded joint, " t " type of plate welded joint and cruciform joint are estimated. estimations are consistent with fatigue testes

    利用面積法和應力場強法，通過有限元計算分析，預測了錯位板接頭、 t型板接頭和十字型板接頭在對稱循環和非對稱循環時的疲勞強度，並與疲勞試驗進行了比較，理論預測與試驗基本一致。
  4. Creep analysis methods of high - rise buildings and large span buildings can only refer to creep coefficient method in bridge engineering or the method of degree of creep in hydraulic construction engineering under the present experiment conditions. in this paper, the incremental expressions of concrete creep and shrinkage strain when the initial computational age is not the same as the loading age are derived and corrected from the concept of concrete creep coefficient and the mean value theorem of integral and the principle of superposition. the differences of efficiency and accuracy of creep analysis between the finite element method with creep coefficient and the initial stress method with degree of creep are presented. this paper suggests that engineers should use the initial stress method with degree of creep to estimate the influences of creep on high - rise buildings and large span buildings on the basis of conceptual design

    基於現有的試驗資料，高層及大跨度民用建築的徐變分析只能參照橋梁結構中的徐變系數方法或水工結構中的徐變度方法進行.從徐變系數的定義出發，利用積分中值定理和疊加原理，推導並修正了加載齡期與起算齡期不同時徐變收縮應變增量的表達式，對比了應用徐變系數分析徐變的有限元法和應用徐變度分析徐變的初應變法在效率和精度上的差別，並建議應從概念設計的角度出發，採用徐變度的初應變法來估算徐變對高層及大跨度民用建築的影響
  5. Abstract : creep analysis methods of high - rise buildings and large span buildings can only refer to creep coefficient method in bridge engineering or the method of degree of creep in hydraulic construction engineering under the present experiment conditions. in this paper, the incremental expressions of concrete creep and shrinkage strain when the initial computational age is not the same as the loading age are derived and corrected from the concept of concrete creep coefficient and the mean value theorem of integral and the principle of superposition. the differences of efficiency and accuracy of creep analysis between the finite element method with creep coefficient and the initial stress method with degree of creep are presented. this paper suggests that engineers should use the initial stress method with degree of creep to estimate the influences of creep on high - rise buildings and large span buildings on the basis of conceptual design

    文摘:基於現有的試驗資料，高層及大跨度民用建築的徐變分析只能參照橋梁結構中的徐變系數方法或水工結構中的徐變度方法進行.從徐變系數的定義出發，利用積分中值定理和疊加原理，推導並修正了加載齡期與起算齡期不同時徐變收縮應變增量的表達式，對比了應用徐變系數分析徐變的有限元法和應用徐變度分析徐變的初應變法在效率和精度上的差別，並建議應從概念設計的角度出發，採用徐變度的初應變法來估算徐變對高層及大跨度民用建築的影響
  6. In this work, we detailedly introduced the whole ideas of rkdg finite element method and the theory of constructing gas - kinetic schemes based on boltzmann equation. and then presented a kind of new computational method for solving id and 2d compressible euler equations, i. e. firstly, we discretize euler equations in the space with discontinuous galerkin finite element method ; secondly, we discretize temporal variable t with runge - kutta formula ; thirdly, for numerical fluxes constructing, we give two kinds of different numerical fluxes - kfvs and bgk numerical fluxes by using gas - kinetic schemes

    本文分別對rkdg有限元方法的整個思想和基於boltzmann方程的分子動力學格式的構造思想給予了詳細的介紹，並分別結合rkdg有限元方法與kfvs數值通量和bgk數值通量的構造方法，給出了一種求解一維、二維可壓縮流體力學方程組新的計算方法，即，我們先用間斷有限元方法進行空間離散，然後再對所得到的半離散格式使用runge - kuttatvd方法進行時間離散，得到全離散格式。
  7. Hydraulic pound, vibrate, noise and cavitation are the main difficult problems in water hydraulic valves, and finite element numerical analysis is proved to be an effective computational method, so numerical simulation and visualizing research on the flow field in water hydraulic valves by applying finite volume method is very important

    水壓閥中的液壓沖擊、振動、噪聲以及水壓閥中的氣蝕是研製水壓閥存在的主要難題，而有限體積數值計算方法又被證實是一種可行而有效的流場計演算法，因此應用有限體積法對水壓閥閥道內流場進行數值模擬和可視化研究，是非常有意義，也是非常重要的。
  8. Based on theoretical analysis and computational model, a three - dimension numerical simulation software 3c3d ( concrete cracking control 3d ) was finished in which finite element and finite difference method were both hired. compared with the known data, good agreement proved it reliable and practicable. finally, by means of the software, with variant of environmental temperature and relative humidity and different curing conditions, the variety regulation of temperature and humidity and the stress due to them within concrete were analyzed

    然後針對收縮開裂的本質因素即混凝土內部的溫度梯度和濕度梯度，進一步從理論上分析了高強高性能混凝土早期溫濕度場隨齡期發展的分佈情況，分析溫濕度變化與收縮變形的關系，建立了相應的計算模型，並且採用有限元和有限差分方法編制三維模擬系統軟體3c3d （ concretecrackingcontrol3d ） ，通過與已知數據的對比分析，驗證了該模型的可靠性和實用性。
  9. Thirdly, to improve the application of light gauge steel structure in our country, some experimentations of institute of new - style steel structure which adopting native productions are induced nally, three - dimensional finite element model is presented. compared with the tests, mumerical results are verified much accurate and efficient, therefore a reliable way is provided to utilize the computational technique adequately to reduce the tests and to utilize the experimental results adequately to improve design quality, ( 3 ) study on floor system. not only adequate strength, stiffness and integer stabilization must be provided, but also insulation, fire and acoustics must be satified

    本文首先論述了lgsfcbw各種破壞模式及其原因，總結了各因素對lgsfcbw抗剪性能的影響，從而為我國引進和應用輕鋼龍骨結構體系奠定了基礎；其次從試驗模型、試驗方法和試驗結果三方面探討了國外lgsfcbw抗震性能的研究，並分析該體系的破壞模式和抗震特性、提出研究建議；然後介紹了為推動輕鋼龍骨住宅國產化，我們採用國產材料開展的系列試驗；最後提出了lgsfcbw的有限單元分析法，數值計算與試驗結果一致，為充分利用計算技術減少試驗數量和充分利用試驗成果提高設計水平提供了一條可靠途徑。
  10. Fluent is based on finite volume method, which is different form the widely used traditional analytical solution and numerical method based on finite element method and finite difference method, and its advantage is the high computational efficiency and precision

    目前針對徑向軸承和止推軸承靜特性的研究，多採用簡化的解析方法或數值解法，數值解法主要是有限元法和有限差分法，計算效率較低。
  11. A nonlinear numerical model for wave transformation is established in time domain based on integral equation transformed from two dimensional laplace equation. then the model is applied to compute the linear wave and nonlinear wave deformation in offshore flow field. a new 0 - 1 combined bem ( boundary element method ) is adopted in this thesis to avoid computational errors accumulated with time steps

    本文以波動勢函數的laplace方程的green積分轉換得到的邊界積分方程為基本控制方程，建立了一種新的時域內波浪變形計算的數值模型，籍此對非線性波浪在結構物周圍的波浪形態進行了數值模擬，並通過數值造波水槽內的波浪試驗對數值模擬結果進行檢驗。
  12. A computational method is developed with couples the governing equations of the unsteady flow field and the rigid - body dynamics in six degrees - o f - freedom. 6. facing the complex multi - element and high - lift configuration, a series of methods including multi - zone algorithm and face - to - face technique is developed to lower down the great difficulties of grid generation and finish flow calculation of high - lift system with the dual - time method

    採用基於自適應直角切割網格的分區面搭接方法，結合隱式雙時間推進演算法，實現了三維復雜增升裝置繞流的euler方程數值計算，發展了對存在不連續面的高陞力系統外形進行流場計算的一種方便、實用、高效的三維增升裝置繞流計算方法。
  13. Only clouds of points instead of grids are distributed over the computational domain and the spatial derivatives are estimated using a least - square curve fit on local clouds of points. the paper gives discrete form for euler equations on base of gridless method, and adopts five steps runge - kutta scheme for time - marching. the numerical results have been obtained for the 2 - d flows over airfoils or multi - element airfoils using the method presented

    本文首先對無粘euler方程進行無網格離散，並運用顯式runge - kutta格式推進求解，成功地數值模擬了二維單段和多段翼型的繞流；在此成功的基礎上通過在euler方程的右端加入粘性項，使求解方程變為層流navier ? stokes方程，得到了翼型繞流，數值結果顯示出粘性的影響。
  14. This thesis deduces computational formulations of displacement sensitivity and stress sensitivity in structural shape optimization considering geometric nonlinear element. in the calculation of stress sensitivity, the modules required to cut the stiffness matrix of node coordinates few. in order to simplify calculation and make program conveniently, this thesis uses half - parser method

    在空間剛架結構的形狀優化設計中，關鍵的一項工作就是計算應力靈敏度，在計算應力對剛架結構形狀優化的設計變量? ?結點坐標的靈敏度時，需用到單元剛度矩陣對結點坐標的導數。
  15. Using the approximation form of lumped mass matrix instead of the mass matrix in finite element discretization in space, backward differencing scheme in time, an implicit computational scheme is yielded, it proved the convergence estimate for this implicit scheme

    對有限元離散中引起較大誤差的質量矩陣，採用了近似形式的集總質量矩陣來代替，時間項採用向後差分，得到了一個隱式的計算格式，證明了計算格式的收斂性及其收斂速度估計。
  16. Secondly, two carbon fiber reinforced composite beams were fabricated, and their modal frequencies were measured by an experiment method. thirdly, delaminations were modeled by pairs of nodes with the same coordinates but different node numbers, while the modal frequencies of these beams with different delamination location and size were computed by an eas piezoelectric solid element. moreover, a novel method combining computational mechanics and neural network was demonstrated for composite health monitoring ; the first five flexure modal frequencies obtained by fem were modified by a primary revising approach and were used to train the neural network

    本文較全面地評述了神經網路的應用模型、改進演算法等，編制了bp神經網路程序：制備了纖維增強復合材料試件，並進行實驗模態分析；利用坐標相同、節點號不同的方法模擬脫層損傷，基於eas列式的壓電固體單元計算了不同脫層損傷情況下的頻率信息；針對基於實驗數據訓練神經網路存在樣本不足的缺陷，本文提出了利用有限元方法對含有脫層損傷的復合材料試件進行數值模擬，以前五階彎曲模態頻率構建訓練樣本的新思路，並提出了一種初步的計算值修正方法，以此構建神經網路的訓練樣本：將實驗模態分析的結果送入訓練好的神經網路進行預測，實現了對復合材料梁的脫層損傷的定位和損傷程度的評估。
  17. Firstly, the theory of compound foundation and pile foundation are summarized in this paper. the finite element, displacement models and computational program are introduced, then how such factors as the stiffness of pile, the ratio of length and radius of the pile & replacement ratio influence the settlement of compound foundation are analyzed. there has the best modulus of pile, the best of the length & replacement ratio and some data have been obtained

    首先總結了復合地基和樁基的理論和設計計算方法，對有限單元和位移模式以及有限元計算程序進行了介紹，然後分析了樁的剛度、長徑比、置換率等因素對復合地基沉降的影響，證實了帶承臺復合地基存在最佳樁土模量比、最佳長徑比和最佳置換率，並得出了相應的數值可供工程實踐參考。
  18. The finite element analysis method based on contact problem is a numerical algorithm used for solving contact problem of connection interface, which is developed from the general fem. this method is a combination of elasticity theory and fem, also it is an important aspect of computational structure mechanics

    考慮接觸問題的有限元分析法是在傳統的有限元法基礎上發展起來的處理連接面接觸問題的一種數值計算方法，它是彈性力學基礎理論與有限元方法相結合的產物，是計算結構力學的一個重要分支。
  19. Two variant semi - analytical generalized hybrid mixed crack finite element procedure for computational fracture mechanics in multi - layered domains

    金屬體積成形過程有限元模擬中六面體網格重劃技術的研究
  20. Local buckling capacity of steel composite beam subjected to combined bending, shear and patch loading is one of key problem in steel structures design. the computational formula for local stability of web was based on the assumption of infinite - elastic perfect plates in the steel structures design code ( gbj17 - 88 ). but in the revised code ( gb50017 - 2003 ), this formula was made big change with reference to british code ( bs5950, partl ) and australian code ( as4100 ), the related research result of our country was included as well. in the modified formula, influence of early geometric imperfection and elastic - plastic buckling stage were considered, which is compatible with both actual circumstance of engineering and the strength formula of beams under bending stresses ( considering partial plasticity of the section ). in this paper, the preceding problem is deeply analyzed and studied, considering the effects of various geometric parameters and stress combinations on buckling critical stress of web, the revised local buckling correlative formula for transverse and longituded stiffened web panels under combined stresses is analyzed and verified by finite element method

    組合鋼梁腹板在彎、剪及局壓復合應力作用下的局部屈曲承載能力是鋼結構設計中需考慮的問題，新的《鋼結構設計規范》 （ gb50017 ? 2003 ）對此部分內容作了較大改動，原規范中關于腹板局部穩定的計算公式是基於無限彈性的完善板假定；新的規范則參考了英國規范（ bs5950 part1 ）及澳大利亞規范（ as4100 ）並結合我國相關研究成果，考慮了屈曲進入彈塑性階段以及初始幾何缺陷的影響。這不僅與工程實際情況相符，而且也與鋼梁在彎曲應力作用下允許截面部分進入塑性的計算公式相協調。
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