numerical criterion 中文意思是什麼
numerical criterion
解釋
數字準則-
Abstract : to account some difficult problems in theoretical calculation of blasting demolition of buildings, the criterion for disintegration of brick - concrete structures, blasting height of frame structure, counteracting force of supports are analyzed. a numerical simulation is demonstrated for structure ' s destabilization and dilapidation in the process of blasting demolition of buildings such as chimney and bridge, which services a guide for theoretical study and practice of blasting demolition of buildings
文摘:針對建築物爆破拆除理論計算難以把握的幾個問題，如磚混結構解體的判據，框架結構建築的爆高、支座反力，以及框架結構失穩和煙囪、橋梁爆破拆除倒塌過程的數值模擬方法，進行了分析和說明，為建築物爆破拆除設計理論研究與施工提供了參考依據。 -
Abstract : incompatible element nh11 and hybrid stress element 18 were employed to analyze rock burst occurring in coal face 9108 of sanhejian coal mine. compared with the results from ansys, the two optimized fems can execute more accurate numerical simulation in the research of rock burst as well as other rock problems and lessen the errors from inaedquately meshing in huge calculations due to the limitation of labor and computer time. in addition, the criterion of averaged generalized stress rate was proposed and used to determine the site and moment of rock burst. the given conclusion is in accordance with the face of coal face 9108 very well
文摘:利用優化非協調元和雜交元分析了三河尖礦沖擊礦壓，並與ansys程序的計算結果進行了比較.認為優化有限元在沖擊礦壓乃至巖石材料的數值模擬中能給出更為精確的結果，也可減小大型計算中由於人力、機時所限粗分網格產生的誤差.分析中，採用了廣義平均應力率準則來判斷沖擊點位置和沖擊時刻，所得結論與實際情況吻合 -
Using the complex potential method in the plane theory of elasticity of an anisotropic body, the series solution of finite anisotropic thin plate containing an elliptical inclusion is proposed with the help of faber series. a hybrid element with an elliptical inclusion for anisotropic materials is obtained by using the hybrid variable principle, and the element efficiency is verified by numerical examples. the state of the damage is modeled by an elliptical soft inclusion, and using the point stress criterion based on characteristic curve and yamada - sun etc. criteria, the prediction of the strength of a composite laminate with damage is set up
首先基於經典層板理論，將復合材料層板的彈性問題化歸為均勻各向異性板來求解；採用各向異性體平面彈性理論中的復勢方法，以faber級數為工具，給出了有限大含橢圓核各向異性板彈性問題的級數解形式；利用雜交變分原理，成功導出含橢圓核各向異性板雜交應力有限元，並用算例驗證了該單元的可行性和有效性；採用含剛度折減橢圓形彈性核的沖擊損傷模型，引入基於特徵曲線和yamada - sun破壞準則的點應力判據，建立了含損傷復合材料層板剩餘強度的分析方法；通過數值計算詳細討論了各種幾何參數對損傷層板應力分佈、剩餘強度的影響，得到了一系列對工程應用具有實用價值的結論。 -
With the help of the theoretical equation of rolling and the energy criterion of mechanical vibration, and on the base of full consideration of roll gap nonlinearity during vibration, this paper suggests an approach to analyse the stability of self - excited vertical vibraiton of high speed cold strip mills by numerical method
摘要本文在充分考慮軋機垂直振動過程中輥縫非線性的基礎上，利用軋制理論方程和機械振動理論中的能量判據，給出了更精確的分析高速冷軋機垂直自激振動穩定性的數值計算方法。 -
Concludes a concrete form of the criterion equation of ventilation efficiency by the regression analysis of the experimental and numerical simulation data in literatures
對有關文獻中的實驗和模擬計算數據進行了回歸分析，獲得了通風效率特徵方程式的一種具體形式。 -
Based on an analysis of the mechanism of flow pattern alternation, approximate criterion for flow pattern alternation was formulated, and a numerical model was worked out for simulation of free overfall and submerged overfall alternation by combination of the above two models
分析兩種不同水流形態的交替機理，建立兩種水流的轉換條件，聯立兩種不同形態的數學模型構成保水堰的堰流和滿流交替的非恆定流數學模型。 -
Accordingly, a new framework, which provides a common scheme for the numerical simulation on the macroscopic behavior of ferroelectrics though multi - scale analysis on the coupled thermo - electrics - mechanical behavior of multiphase in heterogeneous material, is induced to construct the effective constitutive equation of multiphase. in chapter four, based on the law of domain nucleation and domain wall motion of 1800 domain switching, a new scheme of domain switching and numerical simulation approach is put forward on the foundation of thermodynamics. driving traction, nucleation criterion, velocity of domain wall motion, kinetic relation and rate of domain switching in a single grain are given
第四章以鐵電體1800疇變的過程中形核規律和疇界運動規律的實驗觀察結果為基礎，根據熱力學理論建立鐵電體疇變的理論框架和數值模擬方法；給出了單疇內疇變驅動力、新疇形核準則、疇界運動速度公式、疇變動力學的表達式，單晶的疇變速率公式；用細觀力學的觀點給出了對多晶鐵電體多場耦合的有效性質進行包含疇變速率影響的多尺度分析方法。 -
Comparing experimental results with the numerical analytic results using the criterion, it is found that the criterion employs the axial deformations of bracing members as fatigue damage parameters and can be applied to real - time estimation of low - cycle fatigue damage of bracing members under a loading history - dependent random stale
研究結果表明：本文方法以鋼支撐軸向位移為損傷參量，能實時估算在隨機位移荷載下鋼支撐的低周疲勞累積損傷發展，並與試驗結果吻合較好。 -
Chung - ren chou, john z. yim, r. s. shih, 2003, numerical study on the breaking criterion for solitary waves, china ocean engineering. vol. 17, no. 4, pp. 589 - 604
周宗仁，黃偉柏，尹彰， 2003 ，離岸堤周圍波場特性之研究，海洋工程學刊，海洋工程學刊，第3卷，第1期，第35 - 52頁。 -
Chou, chung - ren, john z. yim, r. s. shih, 2003, numerical study on the breaking criterion for solitary waves, china ocean engineering. vol. 17, no. 4, pp. 589 - 604
周宗仁，黃偉柏，尹彰， 2003 ，離岸堤周圍波場特性之研究，海洋工程學刊，海洋工程學刊，第3卷，第1期，第35 - 52頁。 -
In the paper, on the basis of expounding the importance of similarity theory in the numerical simulation of tectonic stress field, it is pointed out that, only by making the numerical model be similar to the geological prototype in material, combination pattern, boundary condition, loading mode and cracking criterion, etc., may the simulation result be real
摘要論述了在構造應力場模擬中相似性原理的重要性，指出地質原形與數值模型在材料、組合形式、邊界條件、受力方式和破裂準則等方面必須相似，模擬的結果才具有真實性。 -
By means of numerical emulation, it analyses the pile vertical bearing capacity under different lengths, diameters and strength parameters of mediators as well as the inner force under lateral and combined loads, giving the criterion of rigid pile and flexible pile. with elastic theory, the paper deduces the inner force calculating formula under eccentric load and the bearing capacity calculating formula under vertical load ; establishes a complete design and calculating method of large diameter pile
通過數值模擬，對樁在豎向荷載作用下不同的樁長、樁徑及樁周介質強度參數變化時樁的承載性狀進行了分析，並對樁在水平向荷載及其組合荷載作用下樁的內力變化規律進行了分析，提出了大直徑鉆埋預應力混凝土空心樁的剛性與柔性界定標準。 -
Numerical stability, the other issue of the lattice boltzmann method, is discussed in chapter 5. corresponding to the uniform and shear background flow, the stability of d2q7 d2q9 and d3ql5 model is analyzed through the von neumann linear stability theory, both the conclusion about the mass distribution parameters, the wave number, the relaxation time and the uniform velocity, and the linear stability criterion n r0. 58 are instructive to numerical simulation of flow
第五章考慮了數值方法另外一個方面的問題，在均勻流和剪切流兩種背景流場下，運用vonneumann線性分析法，針對d2q7 、 d2q9及d3q15格子模型，分析了質量分佈參數、波數、鬆弛時間和平均流速等決定模型穩定性的主要參數對模型穩定性的影響，得到了對流場數值計算具有指導意義的一般性結論與線性穩定性標準n r _ e ~ （ 0 . 58 ） 。 -
A method of choosing the wind load influence modulus that decides the wind load numerical value of combination structure was proposed correspondingly. firstly the wind load parameter that influences the wind load of combination structure was chosen according to design criterion of high - rising structure and through tradition calculation methods of wind load. by using currently calculation methods the axis force and martix of the most danger section was worked out, and the security of structure was analyzed and checked
首先運用傳統風荷載計算的方法，結合本文的組合結構的特殊情況，以高聳結構設計規范為參考，參照風荷載理論選定了影響該組合結構風荷載的風荷參數，並依據一般塔架演算法（簡化懸臂梁法）計算出了與底座連接處斷面（最危險截面，距塔底6米段）的軸力和彎矩，同時對此處進行了應力分析和可靠性校核。 -
The finite element numerical simulation analysis is an important method to predict sheet metal instability in the sheet metal forming process. and the current general - purpose finite element codes all choose the strain - based forming limit diagram as the instability criterion, which has the limitation of correlative to the strain path. thus it is very inconvenient to study sheet metal forming under complex strain paths
有限元模擬是板料成形過程中預測板料失穩的重要手段，考慮到當前通用的有限元軟體都是以存在應變路徑相關性缺陷的基於應變的成形極限圖為失穩判據，以致在研究復雜應變路徑板成形時極為不便。 -
First using analytical method, we obtained the nonlinear baroclinic subcritical instability criterion and symmetric subcritical instability criterion. second using numerical experiments, we analyzed the influenced fact on the baroclinic subcritical instability, and we also analyzed what the nonlinear subcritical symmetric instability effects on a rainstorm, and advanced a new mechanism produced the rainstorm
本文利用解析方法導得了大氣中非線性斜壓亞臨界穩定性判據和對稱亞臨界穩定性判據；並分別用數值試驗方法分析了斜壓亞臨界不穩定的影響因素以及亞臨界對稱不穩定在一場暴雨過程中所起的作用，提出了產生暴雨的新的物理機制。 -
In this paper, systematic numerical test have been carried out to study the stability of surrounding rock mass with different distribution of weak interbed, different distance between weak interbed and limit of excavation, different thickness of weak interbed, in the different confining coefficient and representational surrounding rock mass graded ii, iii, iv. all of the numerical modeling is plain - strain type with elastic - plastic constitutive law and mohor - coulomb failure criterion, through the integrated numerical analysis program final. plentiful numerical test results have been drawn via analyse the deformation, tensile stress region, plastic region of surrounding rock and the stress status of shot - crete
大量的工程實踐表明，軟弱夾層對地下洞室圍巖穩定性的影響有著決定性的作用，本文以大型數值模擬分析系統final為平臺，採用彈塑性應力應變關系和m - c屈服準則建立平面應變問題有限元模型，對軟弱夾層的分佈部位、分佈距離、軟弱夾層的厚度對圍巖穩定性的影響以及在具有不同側壓力系數的地應力場中和、 、類代表性圍巖中軟弱夾層對圍巖穩定性的影響進行了系統的數值試驗，研究得出了軟弱夾層對圍巖位移、拉應力區、塑性區以及噴射混凝土層內力等影響豐富的量化成果，以便直接為工程設計人員提供參考。 -
Thus, non - negative property is suggested as the criterion of stability. furthef, diffusion coefficient is replaced by an artificial one in the finite difference equation to simulate the entropy generation can improve the accuracy of the numerical analysis
在盡可能滿足對流擴散過程數值格式中的輸運性或守恆性及穩定性的同時，以擴散熵產模擬為原則的偽擴散系數可有效地提高數值模擬的模擬性，為數值計算中擴散系數的修正提供了一種有效的手段。 -
Though the finite element analysis is a primary method for the numerical simulation research, the only elastic properties research on 3d braided composites is not enough when it is used in the key components, building the perfect fracture criterion is theoretical basis for its widespread availability
三維編織復合材料的力學性能的數值模擬主要以有限元方法為主，然而僅僅依賴于對其彈性性能的研究結果還遠遠不能滿足三維編織復合材料作為關鍵結構部件的使用要求，建立完善的斷裂準則是編織復合材料大量使用的理論依據。 -
Applying viscoelastoplastic theory, the modified nishihara model was extended into three dimension, the yield criterion and flow vectors fitting for computing were attained. according finite element theory, the computing method and step of nishihara rheological model was given, numerical simulating of three point bending creep test was performed and the results were coincided with that of test
運用粘彈塑性基本理論，對改進后的西原流變模型時空離散並拓展到三維空間，給出了適合數值計算的屈服準則和流動矢量求解方法；給出了西原流變模型數值計算基本方法和步驟。
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