numerical calculation 中文意思是什麼

numerical calculation 解釋
數值分析法
  • numerical : adj 數字的；數值的；用數字表示的。 （a） numerical order 號數。 a numerical statement 統計。 the ...
  • calculation : n. 1. 計算，計演算法。2. 推定，預測。3. 深思熟慮，精打細算；慎重的計劃；算計。
  1. 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。
  2. By numerical calculation and analysis of bimorph and unimorph piezoelectric beams, the difference and applicable scope between linear and nonlinear models were found

    通過對雙壓電晶片梁和單壓電晶片梁的數值計算及分析得到線性與非線性模型之間的差別和適用范圍。
  3. It is the key of ebfs, therefore, furthermore calculation about link are carried out in this thesis, introduced achieved research, summarized the affect of link on whole capability in the first, the second, numerical calculation are proceeded on link with ansys : with the purpose of discussing yielding mode critical length of link, established five different specimens ; with the purpose of discussing the influence of h / tw of web, b / tf of flange and h / b, established eighteen different specimens ; with the purpose of discussing the affect of stiffener, established four different specimens, and elaborated the affect of stiffener on link based on achieved test researches

    因此，本文對耗能梁段進行進一步計算分析，概述耗能梁段對整體性能的影響，並利用有限元程序ansys對耗能梁段進行數值計算：針對耗能梁段的屈服類型建立5種不同長度的模型，計算討論耗能梁段屈服類型的長度劃分；針對耗能梁段腹板高厚比、翼緣寬厚比以及梁段截面形狀等因素共建立了18種模型進行計算分析；針對加勁肋對耗能梁段的作用建立了4種模型，並結合已有的試驗闡述了加勁肋對耗能梁段的影響。
  4. Application of numerical calculation into draft tube construction

    數值計算在三峽電廠尾水管施工中的應用
  5. First, the noblesse new slender ship theory is introduced and modified to make it suitable for numerical calculation, with which we can calculate the wave - making resistance coefficient of a ship

    首先引入noblesse新細長船理論，通過在理論方法上的改進，使之適合於半滑行船興波阻力系數。
  6. It adopts reynolds time - average n - s equation and k - ? turbulence model to calculate the inner 3 - d viscid turbulence flow of centrifugal pump. in the unstructured grid, the governing equations are discretized with finite volume method based on finite element method. then the pressure correction method is used to carry out numerical calculation

    而後採用基於雷諾時均n - s方程與標準-湍流模型來求解離心泵葉輪內三維粘性紊流，在非結構化網格中，採用基於有限元的有限體積法對方程進行離散，用壓力校正法進行數值求解。
  7. Firstly, a representative wind and wave model, which could both simulate the main characteristics of wig over sea waves and be suitable for numerical calculation, is presented. the model completely considers the fully nonlinear effect of wave surface on the wavy air flow, separates the disturbance of wave surface from the wing - air wave interaction flow, and overcomes the numerical calculation difficulties due to the large difference of dimensions between wing and water waves

    首先針對機翼在風浪中的非定常非線性氣動力問題，提出了一個既能夠反映風浪場主要特徵又適合於數值計算的風浪場模型，該模型完整地考慮了波浪表面對氣流場的全非線性影響，使波面對流場的擾動分離出來，消除了機翼和波浪幾何尺度上的巨大差異帶來的數值計算上的困難。
  8. Another based mathematics model about the anchor cable is used for ship - anchor system. the numerical calculation have been worked by programmed in the matlab language. at the same time the influence that the dragging speed of antisubmarine helicopter and the height over the surface of ocean acts on the shape and the tension of underwater cable, and that the current velocity and the diameter of anchor cable acts on the shape and the tension of anchor cable, has been calculated

    把建立的水下拖索數學模型和錨索數學模型分別應用於航空吊放聲納探頭?纜繩動力學系統和船?錨系統，採用matlab語言編程進行了數值計算，同時分別計算和分析了反潛直升機拖速、距海面高度對拖索形狀和張力的影響以及海流速度、錨索直徑對錨索形狀和張力的影響。
  9. In this thesis, the assur group theory and kineto - elasto dynamics ( ked ) are applied to conduct the theoretical analysis deeply and to carry out a great deal of numerical calculation for kinematics and dynamics properties of planar linkage

    本文主要針對連桿機構，對其進行了運動學分析和彈性動力學研究，通過matlab軟體，對得出的大量數據進行了可視化後置處理。
  10. In this paper, we study an alternative approach by numerical calculation. at first, we introduce the fundamental principles and the basic components of the electron linear. second, we introduce a way of coupler testing - - three frequency method. and present a example of coupler testing. third, we use numerical calculation method to simulate several accelerator structures. the hfss code and mafia code is used to simulate a three - cavity accelerator structure. the two results are compared

    因此，尋找好的方法來設計加速結構耦合腔很重要。本文首先介紹了電子直線加速器的各相關基本理論和其基本組成部件。接著，介紹了現階段耦合腔測試中常用的一種方法? ?三頻法，並給出了測量加速器耦合腔的實例。
  11. We use hfss code to simulate a four - cavity and eight - cavity accelerator structure. the results are compared with the tesing results of the network analytical apparatus. finally, we present the numerical calculation of hfss code to design accelerator coupler cavity and we give out the whole processes and results

    在第三部分中，用數值模擬的方法模擬了多個加速結構，三個加速腔的結構分別用了hfss和mafia來模擬並進行了比較，四個加速腔與八個加速腔的結構用hfss來模擬並與用網路分析儀測試同結構的實驗腔的結果進行了比較。
  12. It is showed that numerical calculation could give the same position of separation line with the cold gas simulation. however, numerical simulation result is of a little deferent from cold gas simulation in some details, such as recirculation velocity and turbulent intensity. the main problem of numerical simulation is that the turbulent model is not perfect, and the computational grid is not precise enough

    利用實驗結果對數值模擬的準確性作了檢驗和評價，結果表明數值模擬能給出與實驗結果一致的分離線位置，但在某些流動細節上還有差別，如迴流速度大小和湍流度等，數值模擬中存在的主要問題是湍流模型不夠完善和網格生成不夠精細。
  13. Then the nonlinear coupled electromagnetic and electron motion equations were obtained from the lorentz equation. and numerical calculation and analysis of cold cavity by pic software were applied to analyze the both hot and cold dispersion characteristic of this waveguide

    接下來，從電子運動方程出發得到了自洽非線性方程組，通過一階線性近似導出了螺紋波導中注波互作用色散關系，從中分析該波導超寬帶特性。
  14. Material is transported forward in the absolute sliding way driven directly by frication force. some contents of this paper are below : one of them to establish whole machine model, study the theory of transportation and analyze the dynamic characteristics. a numerical calculation method is put forward to solve the theory of material transportation

    通過對輸送機實際工作狀況及工作機理的分析，建立了輸送機整機模型及力學模型，對其進行力學和運動分析，建立動力學方程，提出了一種判斷式數值求解方法，研究了運行的輸送機理
  15. In the thesis, the insulation recovery properties of spark gap switch are investigated through theoretic analyses and numerical calculation, and the influence of gas flow on the insulation recovery of switch is studied experimentally

    本文從理論分析、數值計算等方面研究了氣體火花開關的絕緣恢復特性，實驗研究了氣流對火花開關恢復速度的影響，其研究結果為火花開關的多脈沖運行奠定了堅實理論基礎。
  16. Based on the structure and emission characteristic of the diode bar, a numerical calculation. model of the thermal dissipation was proposed and a related simulation of the effects of heatsinks parameters on the performance of the packaged laser was carried out

    根據二極體條結構及輻射特性，建立了散熱過程數值計算模型，數值模擬研究了熱沉參數對封裝激光器性能的影響。
  17. 4. based on the viscous hydrodynamics, the leakage characteristics of newton liquid that is transmitted by helical gear pump are researched for the aim of the least power loss, and the leakage model is founded, the mathematic models of the radial and the axial leakage are gained. at the same time the optimal radial leakage and axial leakage are got, and the numerical calculation is achieved

    基於粘性流體力學，以功率損失最小為目標，首次對牛頓流體在斜齒齒輪泵中的漏流特性進行了研究，建立了泄漏模型，分別得到了斜齒齒輪泵的徑向和軸向泄漏的數學計算模型；同時得到了斜齒齒輪泵最佳徑向間隙和最佳軸向間隙，並在此基礎上進行了數值計算。
  18. Researching into electromagnetic field by the method of numerical calculation has had in mind, but the researcher of non - linear medium electromagnetic field numerical calculation with hysteresis characteristic is slowness. the reason is that it is difficulty to acquire the magnetization characteristic with high accuracy for non - linear medium magnetic material

    近幾十年來採用數值方法對電磁場進行分析以取得了豐碩的成果，但對于考慮磁滯特性的非線性介質的電磁場數值分析進行緩慢，其原因是對于非線性介質磁性材料，很難精確的獲取其磁化特性。
  19. A method of fuzzy optimization design based on genetic algorithm is presented as a new method of parameter optimization design for dc double closed loop speed adjusting system. the method covers three steps. firstly, speed overshoot rate and settling time are chosen as performance indice according to the demand of engineering. these indice are normalized by using fuzzy membership function and then weighted to form objective function of optimization model of the system. secondly, the dynamic response curve of the system with corresponding parameters and peoformance indice are obtained by computerized numerical calculation and simulation. finally, parameters of engineering design are expanded as searching space ; and parameters of speed regulator and current regulator are taken as genes in chromosome. these genes in searching space are optimized to get best solution by way of genetic algorithm. as shown by experimental results, the parameters designed by this method are capable of significantly improving performance indice of the system, which proves that it is a practical and effective method

    提出一種基於遺傳演算法的直流雙閉環調速系統參數優化設計方法.根據工程技術的要求，選用速度超調量和過渡時間作為參數優化性能指標.將該指標用模糊隸屬度函數歸一化，再加權平均形成系統優化模型的目標函數.採用計算機數值計算方法，通過模擬獲得系統對應參數的動態響應曲線及其性能指標.最後以工程設計的參數為搜索范圍，以速度調節器和電流調節器的參數為染色體中的基因，通過遺傳演算法在搜索范圍中優化這些基因，獲得優化解.實驗結果表明，所設計的參數能使系統性能指標有顯著提高
  20. The theoretical investigation in ionic fluids has been done with analytical or numerical calculation of integral equations

    對于離子液體的研究理論上主要是用解析或數值計算求解積分方程組。
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