displacement sensitivity 中文意思是什麼

Finally, respect to the beam effect induced by special high ratio of modulus of elasticity of baise gravity dam, the sensitivity analysis are carried out to study the relation among displacement, stress state of dam and rock bed parameters

最後，針對百色重力壩特殊的高彈模比地質條件所致懸臂效應，對壩體及壩基的變形和應力狀態與壩基力學參數之間的關系進行了參數敏感性分析。

According to the guidline, two nd : yag lasers have been designed and set up, one is end - pumped by lower output power ld using a selfoc micro lens, and the other is end - pumped by high output power ld using a pair of lenses are designed, and the characteristics such as output power and power stabilization of both solid - state lasers are investigated. thirdly, when an empty liquid crystal cell is inserted in the cavity of the nd : yag laser pumped by high power ld, the laser can operates in single axial mode. finally, according to the relationship between the laser output power and the longnitudinal a ld - end - pumped nd : yag laser sensor for displacement measurement has been investigated theoretically and demonstrated experimently, the results indicate that when the mean radius of pumping inside the laser cavity is far less than that of the oscilating laser mode, the exponential of the output power is a gauss function of the longitudinal positon of focused spot of ld pumping beam, both the measurement range and the sensitivity are dependent on the incident pumping power, as the incident pumping power is increased, the measurement range is enlarged and the sensitivity is improve d

本文首先介紹了ld泵浦nd ： yag激光器的發展狀況、主要特性及其應用，從四能級速率方程出發，推導了ld泵浦nd ： yag激光器的閾值、輸出功率和斜效率的表達式，並簡述了激光器的工作原理、結構型式和倍頻方法；其次，以空間相關的速率方程為基礎，提出了ld端面泵浦nd ： yag激光器的設計方法，給出了一定泵浦耦合方式下，振蕩光模尺寸、最佳輸出耦合率、泵浦光模尺寸、泵浦光焦斑位置等參數的選取依據，以此為依據，設計了自聚焦透鏡耦合小功率ld泵浦nd ： yag激光器和透鏡組耦合高功率ld泵浦nd ： yag激光器，對激光器的輸出功率和功率穩定性等特性進行了實驗研究；再次，在帶尾纖輸出的高功率ld泵浦nd ： yag激光腔內插入一隻空液晶盒，觀察到了激光器以單縱模運轉；最後，根據泵浦光焦斑端面位置對激光輸出功率的影響規律，提出了ld端面泵浦nd ： yag激光位移傳感新方法，並進行了理論和實驗研究，研究結果表明：當激光晶體內泵浦光平均光斑半徑遠小於振西安理工大學碩士學位論文蕩光束腰半徑時，激光輸出功率的自然指數與泵浦光焦斑的縱向位置成高斯變化規律，測量范圍和靈敏度依賴于泵浦功率，隨著泵浦功率的增加，測量范圍擴大，靈敏度提高，當端面泵浦功率為7 . 24w （最大輸出功率為1 . 926w ）時，激光位移傳感器的測量范圍和靈敏度分別是13 . 045mm和0 . 148mw / pm 。

In order to study the thermal performance and residual stress of microelectronic subassembly, in this paper, a newly optical interferometry method for 3 - d displacement measurement is developed based on wavefront interference theory. in which the moire interferometry provide the in - plane displacement, but the system is different from the conventional interferometry, the system applies the double diffraction of the specimen grating, the in - plane displacement sensitivity is a factor of 2 higher than that of the conventional moire interferometer. twyman / green interferometry method for out - of - plane displacement measurement is adapted, the advantages of the optical set - up are structure novelty, and the fringe patterns of the displacement fields shown high contrast and spatial resolution

為了詳細研究試件的熱變形特徵以及殘余應力的影響作用，本文在波前干涉理論的基礎上，設計了一新型三維光學測試系統，該系統的平面位移測試基於雲紋干涉方法，但採用與普通雲紋干涉不同的光路系統，利用試件光柵和平面反射鏡組形成的兩次衍射，使平面位移干涉條紋倍增，測量靈敏度是普通雲紋干涉的2倍，系統的離面位移場測試採用泰曼格林干涉光路。

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。

This thesis is not only discussing and analyzing mathematically the working principle of y type reflection fiber optic detector, but also deducing the fundamental calculating formula of reflection light intensity, and drawing the displacement - responding sensitivity curve. this thesis also points out the three characteristics curves corresponding to the detections in tiny displacement, biggish displacement, and superficial roughness. these are very creative and completely valuable in practicality

按題目要求，論文對y型反射式光纖探頭的工作原理進行了初步探討和數學分析，推導出反射光的基本計算公式，繪出了位移- -響應靈敏度曲線，並指出y型反射式光纖探頭進行微小位移、較大位移、表面粗糙度測試時對應的三個特徵曲線段，具有創新之處和實用價值。

For the displacement sensitivity and positioning accuracy of transmission system, guide linearity, the detecting process and detecting result are expatiated

重點闡述了傳動系統位移靈敏度、導軌直線度、傳動系統定位精度的檢測過程和檢測結果。

For the transmission system ' s the least displacement sensitivity, affection factors of positioning accuracy, system toughness and natural frequency, the paper calculates them carefully. through a great deal of work as above, we affirm that the project of total structure design is feasible

對于該傳動系統的最小位移靈敏度、定位精度的影響因素、系統剛度及固有頻率都進行了細致的計算，肯定了所提出的結構設計方案。

Abstract : this paper studies the sensitivities in the structural optimization of the sheet cover, including the stress sensitivity and the displacement sensitivity as well as the eigenvector sensitivity. the sensitivities are solved by the finite element method. a beam element and a plate element are used for the structural analysis of the sheet cover. some equations about the sensitivities are given out and are applied to the structural optimization of the sheet cover. the results prove to be satisfactory

文摘:分析了在薄壁覆蓋件結構優化中應力敏度和位移敏度的計算方法，利用有限元法進行結構分析和敏度計算，推導出敏度的計算公式，並應用於薄壁覆蓋件的結構優化設計，得到了滿意的結果.薄壁覆蓋件的有限元分析採用了板單元和梁單元，應用實例的計算結果表明，應力敏度、位移敏度等的計算方法準確、可靠

Results show that the displacement sensor based on self - mixing interference has the same phase sensitivity as a conventional interferometer

並且推導出smi位移測量具有與雙光束干涉測量相同的相位靈敏度。

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 second part involves the coupled design optimization of thermal structures, which takes the thermal displacement, thermal stress, thermal buckling and thermal vibration into account, hi this part, the main contents are the theory and computational schemes of sensitivity analysis, the techniques of software design and the algorithms of design optimization for the coupled system. the research work will be introduced with the following chapters

這里的耦合有三方面的含義： 1 ）在系統分析中考慮熱傳導對結構分析的耦合作用； 2 ）在靈敏度分析中，針對直接法和伴隨法兩種計算格式分別考慮了熱傳導對結構或結構對熱傳導的耦合作用； 3 ）在優化設計時，優化模型中同時考慮了熱傳導約束和結構響應約束的共同作用。