擬正則元 的英文怎麼說
中文拼音 [nǐzhēngzéyuán]
擬正則元
英文
quas invertible element-
Thirdly writer, using linear elastic theory and finite element program ( ansys ), analyzed expanding bolt pullout test. fifthly, writer using the modified mohr - coulomb failure theory, on the base of curving failure surface, derived a theoretical formula between pullout force and compressive strength. then the thesis compared the formula with the strength - detecting formula of expanding bolt pullout method
本文採用ansys有限元程序對脹栓拔出法試驗過程進行彈性理論分析；以修正的摩爾-庫侖破壞準則，在擬合實際破壞面的基礎上推導出極限狀態下脹栓拔出法的混凝土拔出力與混凝土抗壓強度的理論公式，並把該公式與脹栓拔出法測強公式進行了比較。According to the rules and considerations which are based and taken into account in the practical work, this paper proposes a new model for distribution maintenance scheduling which intends to find the most economical maintenance schedule without violating any restrictions and also the paper makes a deep research of ga, sa and ts. by constructing two effective instructive rules which derive from the feature of distribution maintenance schedule and introducing ts into mutation operation of ga in the earlier generations, the proposed method improves the convergence of optimization and shortens the calculation time. the proposed model and method are applied to a practical system, and numerical results verify ' the correctness and validity of them
本文結合實際電力調度計劃工作中檢修計劃的制定原則和所要考慮的各種因素，抽象出適合配電網檢修計劃優化的數學模型：對遺傳演算法、模擬退火演算法以及禁忌搜索演算法等多種演算法進行了研究和分析比較，針對遺傳演算法的不足提出了通過對實際問題的分析抽象出一定規則指導演算法在解空間進行搜索和兩階段變異運算元兩項改進措施，並應用於配電網檢修計劃優化，編制了相應的應用軟體；應用該軟體對我國南方某地區供電局某月的檢修計劃進行優化的結果表明，本文所提出的模型和改進的優化方法是正確和有效的。In this thesis it was proposed to simulate the drawing, trimming, flanging by using error - adjustment method. the initial trimming lines would be adjusted and optimized in the computer by adjusting error. if the shape error between the flanging boundary line and the target is larger than prescribed, the redundant area is subtracted from the initial blank by some amount of volume along the deformation path, and the insufficient volumes are added to the initial blank by the same amount
本文提出，利用基於變形路徑的誤差修正法（ error - adjustment ） ，結合cae技術將對初始修邊線的調試過程在計算機中進行模擬（包括拉延、修邊、翻邊、整形等）計算，通過控制翻邊后零件成型邊界與實際目標輪廓之間的尺寸誤差來優化修邊線，如果初始切邊、翻邊后的輪廓與目標體的邊界存在較大偏差，則初始切邊輪廓中多餘部分單元將沿其變形路徑以相同體積量被切除，不足部分則沿其變形路徑以相同體積進行補償。At first, ploygon aggregate structure of concrete is randomly generated in two - dimensional plane with monte carlo method on the meso - level. then, the growth process of a crack of concrete 3 - point bending beam specimen is analyzed by fem, according to the criterion of maximum circumferential tensile stress. and the path of crack to spread in mortar, aggregate and interfaces of them is gained by the ultimate fracture criteria in construction standard that the width of crack should not be more than 0. 2mm
首先，在細觀層次上，根據蒙特卡羅隨機抽樣原理，在二維平面上建立了混凝土多邊形隨機骨料結構模型，然後採用有限元計算方法，根據最大周向正應力準則，對三點彎曲梁構件進行了開裂過程的模擬，並以建築規范中構件裂縫小於0 . 2mm的要求為最終破壞標準，得出了裂紋在基質、骨料及界面的擴展路徑。Base on the basic principle of continuum mechanics, 2 - d contact type model are derived using circular plate element. mohr - coulomb type failure criteria and failure coefficients related with stress ratio are used in this model to simulate the failure process. the wave propagation in an orthotropic plane under impact loadings was numerically simulated, by using this algorithm
從連續介質力學的基本原理出發，推導基於圓盤單元的正交各向異性二維連結型離散元計算模型，在模型中採用了mohr - coulomb型破壞準則和與應變率有關的材料破壞系數用以模擬材料的動態損傷和破壞過程。分享友人