initial stress method 中文意思是什麼

initial stress method 解釋
初始應力法
  • initial : adj 最初的，開始的；原始的；初期的，初發的。 the initial boiling point 【化學】初餾點〈第一滴餾物...
  • stress : n 1 壓力，壓迫，緊迫，緊張。2 【語音】重音；重讀；【詩】揚音；語勢，著重點。3 重要（性），重點，...
  • method : n 1 方法，方式；順序。2 （思想、言談上的）條理，規律，秩序。3 【生物學】分類法。4 〈M 〉【戲劇】...
  1. In the self - calibration scheme, the thesis emphasizes the accuracy of camera intrinsic and extrinsic parameters. we presents an accurate f method based on corresponding point adjustment. the method adjusts coresponding points according to the fixedness of projective transformed cross ratio, then calculates f matrix accurately through linear and non - linear methods. when computing intrinsic parameter, a matrix, we simplify the step, and stress on the two important parameters of a. the result will be getten through solving kruppa equation based on svd decomposition. in order to compute extrinsic parameters, we use linear method to get initial r and t, then apply non - linear method to accurate them

    提出了基於匹配點調整的f求精方法，先根據攝影交比不見性對手工選擇的匹配點進行調整，再用線性、非線性結合的方法求精f矩陣；在計算內部參數a中，進行了一定的簡化，把重心放在a中重要的兩個參數上，用svd分解法計算kruppa方程；在計算外部參數時，首先用線性法求解r 、 t ，然後再用非線性法迭代求精。
  2. Three main error sources are the variation of intensities, the orientation errors associated with the configurations of the polariscope and the initial stress existing in the model. a quantitative method is presented to analyze and estimate the influence of different error sources on the final isoclinic results calculated by fcpst or the other pst

    本文提出它們影響五步彩色相移法的定量誤差分析方法；提出控制各誤差的具體指標；給出了避免或降低這些誤差源影響的措施，為合理設計製造儀器、指導實驗和保證實驗結果的精度提供了依據。
  3. Abstract : the back - analysis on displacements may provide a new method for engineers responsible for the slope engineering design to choose mechanical parameters and some components of the initial stress

    文摘:位移反分析的提出，可望為邊坡工程設計工程師提供一個確定有關地層力學參數和某些地應力分量的新方法。
  4. Creep analysis methods of high - rise buildings and large span buildings can only refer to creep coefficient method in bridge engineering or the method of degree of creep in hydraulic construction engineering under the present experiment conditions. in this paper, the incremental expressions of concrete creep and shrinkage strain when the initial computational age is not the same as the loading age are derived and corrected from the concept of concrete creep coefficient and the mean value theorem of integral and the principle of superposition. the differences of efficiency and accuracy of creep analysis between the finite element method with creep coefficient and the initial stress method with degree of creep are presented. this paper suggests that engineers should use the initial stress method with degree of creep to estimate the influences of creep on high - rise buildings and large span buildings on the basis of conceptual design

    基於現有的試驗資料，高層及大跨度民用建築的徐變分析只能參照橋梁結構中的徐變系數方法或水工結構中的徐變度方法進行.從徐變系數的定義出發，利用積分中值定理和疊加原理，推導並修正了加載齡期與起算齡期不同時徐變收縮應變增量的表達式，對比了應用徐變系數分析徐變的有限元法和應用徐變度分析徐變的初應變法在效率和精度上的差別，並建議應從概念設計的角度出發，採用徐變度的初應變法來估算徐變對高層及大跨度民用建築的影響
  5. Abstract : creep analysis methods of high - rise buildings and large span buildings can only refer to creep coefficient method in bridge engineering or the method of degree of creep in hydraulic construction engineering under the present experiment conditions. in this paper, the incremental expressions of concrete creep and shrinkage strain when the initial computational age is not the same as the loading age are derived and corrected from the concept of concrete creep coefficient and the mean value theorem of integral and the principle of superposition. the differences of efficiency and accuracy of creep analysis between the finite element method with creep coefficient and the initial stress method with degree of creep are presented. this paper suggests that engineers should use the initial stress method with degree of creep to estimate the influences of creep on high - rise buildings and large span buildings on the basis of conceptual design

    文摘:基於現有的試驗資料，高層及大跨度民用建築的徐變分析只能參照橋梁結構中的徐變系數方法或水工結構中的徐變度方法進行.從徐變系數的定義出發，利用積分中值定理和疊加原理，推導並修正了加載齡期與起算齡期不同時徐變收縮應變增量的表達式，對比了應用徐變系數分析徐變的有限元法和應用徐變度分析徐變的初應變法在效率和精度上的差別，並建議應從概念設計的角度出發，採用徐變度的初應變法來估算徐變對高層及大跨度民用建築的影響
  6. In the hogging condition, double bottom and the side shell remain the ultimate bucking strength, deck and upperwing tank remain the yield stress, and the other parts keep elasticity. then the key to calculate the ultimate strength of ship hull girders is to ascertain the ultimate bucking strength of the stiffened panels. in this regard, the developed formulation is designed to be more sophisticated than previous simplified theoretical method for calculating the ultimate strength of stiffened panels under combined in - plane bending and lateral pressure. fabricatio n - related initial imperfections ( initial deflections and residual stresses ) are included in the panel ultimate strength calculation as parameters of influence. all possible collapse modes involed in collapse of stiffened panels, including overall buckling collapse, column or beam - column type collapse, tripping of stiffeners and local bukling of stiffened web are considered

    確定了船體梁整體破壞時的剖面應力分佈之後，關鍵在於確定板架的極限屈曲強度。本文充分考慮了在縱向彎曲、橫向壓力作用下加筋板可能發生的幾種破壞模式，即板架的整體屈曲破壞、樑柱形式的破壞、筋的側傾、腹板的屈曲並同時考慮了初始焊接殘余應力、初撓度的影響，使其更精確的計算加筋板的屈曲強度。對于加筋板中加強筋腹板的局部屈曲，採用解析法推導出筋的腹板的撓度方程及其邊界條件，求解相應的方程，從而計算出腹板的局部屈曲應力。
  7. ( 2 ) respectively by elastic theory analyses and methods of structural mechanics, transverse static analytical equations for flexible pipeline rigid pipeline are established whose outcomes are applied in numerical example to compare those with that by finite element method. ( 3 ) considering interaction of filled soil, pipeline and foundation, with an eye to non - linear soil model, in view of the initial geo - stress field and the effects of interface between soil and pipeline, and by finite element method the calculational model and method are built for transverse stress in pipeline. then, by the great finite element analytical software ansys, those outcomes are applied in calculation example of positive buried pipe to educe the distribution of circumjacent soil pressure and stresses on cross section and to compare it with that calculated by conventional ways before those outcomes are applied in engineering case of positive buried pipe with flexible filled materials to confirm distribution of soil pressures after the measure for reduction and to compare it with measurements. as a result, the model set up in this paper is proved to be applicable after all above - mentioned analyses

    本文基於彈性理論和有限元原理與方法，分析了上埋式地下管道橫向力學計算方法和性狀並探討了上埋式地下管道的減荷等問題： （ 1 ）在分析現有幾種典型的管道垂直土壓力計算方法的基礎上，探討了影響垂直土壓力的主要因素以及改進的方法； （ 2 ）分別通過彈性理論分析法和結構力學的方法，建立了地下管道柔性圓環和剛性管涵的橫向靜力計算方程，並應用在算例中，把所得結果和有限元方法所得結果進行對比分析； （ 3 ）考慮填土、管道和基礎的共同作用、土體的非線性特性、初始應力場以及土體和管道的接觸面因素的影響，利用有限元的思路，建立了地下管道橫向力學有限元計算模型和方法，並且採用大型有限元分析軟體ansys ，針對上埋式管道工程算例，得出了管周土壓力以及管道橫截面應力的分佈狀況和規律，並和理論值進行對比；針對施加柔性填料的上埋式管道工程實例，得出了減荷后的土壓力分佈，並和實測值進行了對比。
  8. A new kind of theory and calculating method which is suitable to cable supported bridges was developed in this paper. cable element can include the structure ' s geometry nonlinearity and initial stress, virtual laminated element has high calculating efficiency and good precision. dimensions of lsctb was put forward based on conclusions of optimum analysis

    推導了適合纜索承重橋梁的纜索單元；引入虛擬單元理論，提出適用於大跨纜索承重橋梁鋼箱梁的一種新方法?虛擬層合板單元法，該單元具有計算效率高，可以模擬復雜結構並滿足工程需要等諸多優越性。
  9. Initial ground stresses of rock slope were simulated, using boundary displacement method ( bdm ) and stress function method ( sfm ) respectively, and combining with finite element method ( fem ). the practical results indicate both methods can simulate the initial stress field with good effect

    採用邊界位移法和應力函數法，並結合有限元程序對巖質高邊坡進行了初始地應力場的模擬與分析，實踐結果表明這兩種方法均能取得較好的效果。
  10. The method for the additional deformation of the bar with initial stress was modified, by using a second - orde r deformation theory

    第八章討論了上述理論的應用范圍，提出了用二階理論改進的方法。
  11. Anew compensation method, " belated initial stress method ", is developed for term of dynamic stiffening by synthesizing the existing method

    在綜合現有方法的基礎上提出了新的動力剛化項補償方法?差時初應力方法。
  12. Mid - point incremental method and initial stress method are used to reflect the nonlinear of the material ' s stress and strain. at the same time, the process of load during construction is simulated

    用中點增量法結合初應力法反映築壩材料的應力應變非線性，計算時模擬壩體施工加載過程。
  13. ( 2 ) to cut down great calculation of assembling and disassembling of stiffness matrix in the nonlinear procedure, the initial stress method is introduced to resolve the nonlinear equations

    （ 2 ）使用初應力法對非線性方程組進行迭代計算，避免了組裝和分解總體剛度矩陣的繁雜而龐大的運算。
  14. In this paper we dissertate the common structure cross forms and excavating methods of highway double - arc tunnel home and abroad at the first part, and study common simulation methods of tunnel construction afterwards. based on the method of reversing and releasing the stress, and combined with the capacity of simulating continuous construction of ansys programme, we come up with the thought of using the method of applying virtual support force to release the stress step by step to realize the step - by - step release of initial stress during the tunnel construction simulation. with the help of design language of ansys, we develop a command to apply the virtual support force

    探討了應用平面應變模型進行隧道施工過程模擬的常用方法，在「反轉應力釋放法」的基礎上，結合ansys軟體可以模擬連續施工的特點，提出利用「施加虛擬支撐力逐步釋放法」來實現隧道施工過程中地應力隨工序的逐步釋放的思路，並且利用ansys的apdl設計語言，開發出施加虛擬支撐力的命令，實現了施工過程中應力的逐步釋放，從而找到了一種模擬隧道施工過程的好方法。
  15. All concrete structures are exposed to volume changes caused by hydration reactions in the early age. if the volume changes are restrained, stresses is generated which will cause cracking when it overcomes the tensile strength. as the mechanical properties of early age concrete vary with time, especially the creep degree depends on the time elapsed and the time at loading, to calculate the stress of concrete structure is a complex nonlinear problem. the finite element method ( fem ) can take account of the evolution of the stiffness properties, the development of thermal strain, creep, shrinkage and so on. in this paper, a general approach for numerically simulating this type of behaviour is presented firstly. then, how to solve this problem is introduced by the general finite element software ansys using the initial stress method. finally, a detailed description of an example calculation that demonstrates the potential of the numerical simulation strategy follows

    早期混凝土由於水化反應都會產生體積變化.如果體積變形受到約束就會產生應力，一旦超過混凝土的抗拉強度就會產生裂縫.由於早期混凝土的力學性能是隨時間變化的，特別是徐變，它不僅與加載時間有關而且同時隨齡期而變化，因此計算早期混凝土結構應力是較為復雜的問題.有限單元法不僅可以考慮混凝土剛度的變化，而且可以考慮溫度、徐變、收縮等因素.本文利用初應力法對通用有限元軟體ansys進行了二次開發，通過工程實例計算了高層建築地下室側墻早期混凝土應力的變化過程，並提出了相應的抗裂措施
  16. The method is applied to shenzhen pumped storage power plant, the regression coefficients corresponding to the in - situ stress factors are determined by fitting the stress measured values, and the initial stress field is obtained for the rock mass of whole engineering

    並以深圳抽水蓄能電站為實例，通過擬合實測地應力資料獲得對應于地應力構成因素的回歸系數，並得到整個工程區的巖體初始應力場。
  17. In the article, the flexible multibody system on the plane is researched ; the coupling dynamic model with relative accuracy is established ; and the phenomenon of dynamic stiffening is simulated by " belated initial stress method when the parts are rotating at high speed

    論文中以平面柔性多體系統為研究對象，建立比較精確的耦合動力學的數學模型，並使用差時初應力方法對其中部件在高速情況下發生的動力剛化現象進行模擬。
  18. With prestressed rolling mill of the middle steelworks of taiyuan iron and steel limited group company as the researched object, this article analyze the existent questions and research the initial stress of prestressed rolling mill and computer control system, analyze the design thought of prestressed rolling mill and clarify the relationship between the dimensional precision of rolled material and the rigidity of base of rolling mill and the main method to increase the rigidity of base of rolling mill, analyze how to confirm the rigidity, sectional area of handle and post, and pretightening force, put forward the viewpoint that the key to assure great rigidity is to assure that the remnant initial stress is always positive during rolling, and develop intelligent control system with plc as the core on the basis of the former research to assure that the remnant initial stress is always positive during rolling

    本文以太鋼集團公司中型型鋼廠預應力軋機為對象，分析了該廠預應力軋機所存在的問題，對預應力軋機的預應力以及微機控制進行了系統研究；分析了預應力軋機的設計思路，闡明了軋材尺寸精度與軋機機座剛度的關系及提高軋機機座剛度的主要途徑；分析了預應力軋機設計過程中預應力軋機的剛度、預緊拉桿和機架立柱斷面積及預緊力的確定；提出了預應力軋機保證高剛度的關鍵就是「確保軋制過程中，殘余預應力始終大於零」的觀點；在前述研究的基礎上開發了以可編程邏輯控制器為核心的智能監控系統，以確保「軋制過程中，殘余預應力始終大於零」這個要求。
  19. This method is not only convenient to consider tubular initial stress and temperature initial strain, but also is of self - superiority, computing result for calculated examples indicate that this method is feasible

    該方法便於考慮鋼管初始應力和溫度初應變，而且有其自身的優越性，算例計算結果表明，該方法是可行的。
  20. In chapter two, the liner theory of elasticity solid ' s addiontional on initial - stress configuration is narrated, the initial stress is adopted as parameter described currently configuration, corresponding virtual principal and variation method are given, and the energy theory of balanceable stable critical condition is put forward according to the ideology of addiontional deformation on initial stress configuration

    第二章從初應力位形上彈性固體附加變形的二次理論入手，引出了初應力位形上附加小變形的場論；採用初應力作為描寫當前位形的參數，提出相應的虛功方程和位移變分原理；從初應力位形上附加變形的思想，提出平衡穩定臨界條件的能量原理。
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