虛荷載法 的英文怎麼說
中文拼音 [xūhézǎifǎ]
虛荷載法
英文
method of fictitious loads-
After the briefly present the origin and features of internet protocol version 6 ( ipv6 ), the paper detailedly introduced the conception, characters, security technologies of vpn, and main tunnel protocols used to implement and deploy vpns. after analyzing and comparing these technologies of realizing vpns, we choosed ipsec. then, the paper analyzed in the ipsec structure, function, work mode, and its components such as authentication header ( ah ), encapsulating security payload ( esp ), internet key exchange ( ike ), encryption and authentication algorithms, security association, security policy, and how they cooperate with each other in order to secure ip packages
在簡要介紹ipv6協議的由來和優點之後,詳細闡述了虛擬專用網的概念、特點、安全技術及實現的關鍵隧道協議,通過對實現技術的分析比較,選用了安全性強大的ipsec隧道技術,接著深入研究了ipv6安全協議ipsec的體系結構、操作模式,詳細論述了ipsec協議簇的各個組成部分,如認證報頭ah協議、封裝安全載荷esp協議、密鑰管理ike協議、加密認證演算法、安全聯盟和安全策略等,以及這些組件之間如何協作,來共同實現對網路層ip數據包的安全保護。The elastic methods are beam - columns method, the pseudo load method, the pseudo lateral load method, the iterative gravity load method and the negative rigidity method
常用彈性分析的方法有:樑柱法、虛擬荷載法、虛擬側向荷載法、迭代重力荷載法和負剛度法。( 2 ) to determine the worst load case accurately and quickly, influence faces of main sections are plotted < > ( 3 ) combining the influence face with the pre - reinforcement space fe model, the internal force and the stability are computed, then the main reasons of the disease are analyzed
( 2 )為準確快速地確定最不利荷載工況,運用虛位移原理和邊界元相結合的新方法,繪制了主要檢算截面的內力影響面。 ( 3 )應用空間有限元模型,結合內力影響面,對加固前進行內力和穩定性計算,分析其主要的病害原因。The methods considering the elastoplasticity are the elastic - plastic hinge method and the pseudo load method. based on the need of non - linear analysis, researchers brought forward nonlinear calculation methods to control the iterative constringency, such as the load controlling method, the displacement controlling method, the arc length controlling method and the pseudo load method
考慮彈塑性的分析方法有:彈性-塑性鉸法和虛擬荷載法根據非線性研究分析的需要,研究人員先後提出了:荷載控製法、位移控製法、弧長控製法和做功控製法等控制迭代收斂的非線性計算方法。Then using the method of unit virtual - load, the displacement constraints are transformed into a explicit function to the design variables
然後利用單位虛載荷法將位移約束轉化為設計變量與約束的顯式關系。2. for the problem with size, stress and displacement constraints, the stress constraint is transformed into movable lower bounds of sizes, the displacement constraint is transformed into an approximate function which explicitly includes design variables by using mohr integral theory. a mathematical programming model of the optimization problem is set up. the dual programming of the model is approached into a quadratic programming model
2 .對于尺寸、應力和位移約束的問題,將應力約束化為動態下限,用單位虛荷載方法將位移約束近似顯式化,構造優化問題的數學規劃模型,將其對偶規劃處理為二次規劃問題,採用lemke演算法進行求解,得到滿足尺寸、應力和位移約束條件的截面最優解。Some hardware are used to construct data acquisition system, virtual instrument are used to compile data processing programs. just as expected, according to standard of iec61400 - 13, some diagram and curve are depicted in the end of dissertation, and program can provide life prediction method of wind turbine from damage theories in the end of dissertation
疲勞載荷測試系統通過一定的硬體系統採集相關數據,在數據分析方面使用虛擬儀器軟體進行數據處理,使用功能強大的labview軟體編程,得到iec61400 - 13標準中所要求的曲線和圖表,最後根據損傷理論得到機械部件的疲勞載荷譜和疲勞壽命的估算方法。In the analysis, a cfst arch ( single tube ) is first divided into a finite number of straight beam elements. according to the virtual work principle and the modified newton - raphson iteration method the tangent stiffness matrix considering double nonlinear properties is established. with regard to the non - equilibrium forces, the material nonlinear property along the height of the section and the length of the element is considered and the computation accuracy is improved as a result
本文首先將拱肋劃分為一系列的直梁單元,運用虛功原理和修正newton - raphan數值迭代演算法的基本原理準確推導了拱肋直梁單元的非線性切線剛度矩陣;在不平衡力方面考慮了沿截面高度和單元長度方向材料非線性的發展過程,提高了計算精度;再根據得到的切線剛度矩陣採用荷載增量步內修正newton - raphan迭代的增量迭代法進行了求解。Abstract : a previously proposed approximate quasi - static theoretical method is employed herein to examine the deformation and perforation of a simply - supported circular plate struck by a flat - faced projectile at normal incidence. based on the principle of virtual work, static load - displacement relationships are first obtained and then used to predict the energy - absorbing capacity of the plate subjected to relatively low speed impact. it is shown that good agreement is obtained between the theoretical predictions and the available experimental data, provided that adiabatic shear plugging failure does not occur, but the influence of strain rate sensitivity is taken into account
文摘:採用準靜態近似理論方法分析簡支圓板在平頭彈丸正撞下的變形和穿透.首先基於虛功原理得到了靜態荷載位移關系,並將其用於預測低速沖擊下圓板的能量吸收能力.當考慮了材料的應變率敏感性,並且不發生絕熱剪切沖塞破壞的前提下,理論預測和實驗結果吻合良好The random excitations are transformed into pseudo excitations expressed in the state equations before the resulting deterministic equations of motion are solved by the proposed precise time - integration scheme with augmented matrix and in unified form
先用虛擬激勵法將隨機荷載化為確定性荷載,然後把確定性荷載用狀態方程表示,進而構造出形式統一的增維精細時程積分格式。分享友人