spot displacement 中文意思是什麼

Secondly, the effort is made to develope new type of transition element for multi - scale fatigue damage simulaton of long - span structures for the transition between elements for the hot spot stress analysis and the structural element. the linear and piecewise linear interplotion function for displacement interplotion are used for the transition element formulation according to the displacement compatibility requirement between element interfaces

在綜合已有的構造過渡單元模型關于位移插值形式的基礎上，通過採用分段線性位移插值模式和線性位移插值方式，並在位移模式中引入非協調位移模式，強迫構造單元通過分片試驗，構造了一種用於疏密網格單元連接過渡單元。

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 。

Starting with the transducing mechanism, the relation between spot displacement and the displacement of sensing element is derived

從傳感原理出發，討論了psd上光點的位置變化量與敏感質量塊的位移變化量之間的關系。

The thesis analyze a on - the - spot test model combining a projiect. utilizing the non - linear finite element theory in the article, form - finding has been took apart with node balanced laws and propping up move law. under the loads every calbe unit strength of axle and node displacement ' s variation tendencies are computed

論文還結合工程實踐對一現場試驗模型進行了分析。文中利用非線性有限元理論，按節點平衡法與支座移動法進行找形分析。計算了外荷載作用下各索單元軸力及節點位移的變化趨勢。

So can amount of displacement measured comes with hall1 s component it has small inertia, respond and wait for the characteristic quickly, except that hall must move with the unit under test in succession component, there are not other activity parts, so can avoid the disadvantages, such as frictional force, mechanical breakdown, etc., adapt to doing the on - the - spot trends to test very much

因此可以用霍爾元件來測量位移量。它具有慣性小，響應快等特點，除了霍爾元件須與被測部件連動外，無其他活動部件，因此可避免摩擦力、機械故障等弊病，很適應做現場動態測試。

Calculating adopts the way of finite unit spot parameter by using the character of dispersion. thus, it can get the similar answer of stress, stress strain and displacement. supervising uses strainmeters, non - stressmeters and tiltmeters, which are buried in the concrete wall to supervise the stress, tress strain, displacement during period of working and makes the forecast

計算採用有限元法將混凝土防滲墻利用離散化變為有限單元節點參數，從而得到應力、應變、位移的近似解；監測採用應變計、無應力計及測斜儀現場埋設在砼墻體內對混凝土防滲墻在施工期及運行過程中進行監測其應力、應變、位移，從而作出預報。