超靜定性 的英文怎麼說
中文拼音 [chāojìngdìngxìng]
超靜定性
英文
hyperstaticity- 超 : Ⅰ動詞1 (越過; 高出) exceed; surpass; overtake 2 (在某個范圍以外; 不受限制) transcend; go beyo...
- 靜 : Ⅰ形容詞1. (安定不動; 平靜) still; calm; motionless 2. (沒有聲響; 清靜) silent; quiet Ⅱ名詞(姓氏) a surname
- 定 : Ⅰ形容詞1 (平靜; 穩定) calm; stable 2 (已經確定的; 不改變的) fixed; settled; established Ⅱ動詞...
- 性 : Ⅰ名詞1 (性格) nature; character; disposition 2 (性能; 性質) property; quality 3 (性別) sex ...
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Finally, the controller working based on the combination of rbf neural networks and traditional pid control was applied to in aclinic kinetic machinery and lifting machinery of tower crane. the simulation of this controller was made using matlab, and the simulation results showed that the control system has some merits, such as quick response, little overshoot, well anti - jamming capacity, and little steady - state error, etc. both the dynamic property and static characteristic of this controller are better than traditional pid controller, and meet the tower crane
應用matlab對塔機的變幅和起升機構的運動控制進行模擬,模擬結果表明基於rbf神經網路整定pid的控制系統具有響應快、超調小及穩態誤差小等優點,其動、靜態性能優于單一pid控制,從而提高了塔式起重機工作機構的工作性能。Optimal plastic design of statically indeterminate beams
超靜定梁的最優塑性設計The main work of this paper was as fellows : ( 1 ) generalized the development of pre - stressed steel structure in our nation and abroad, and pointed out the main problem in practice ; ( 2 ) presented the mechanism of pre - stressed steel structure and revealed its applicable range ; ( 3 ) established the optimization design model for pre - stressed steel structure, which accounts for constraints on stresses and displacements of structure ; ( 4 ) brought forward the optimization design method, which combined linear programming and the principle of full restriction, through which we can obtain the magnitude of each time pre - stress and the optimized sections of each members of structure ; ( 5 ) analyzed the best times of pre - stress and pointed out that 2 ~ 3 times is preferable ; ( 6 ) conducted optimization design on large - space steel roof, horizontal parallel steel truss with local cables, horizontal parallel steel truss with global cable, and ultra - static steel truss, the result of which indicated that the multiple pre - stress structure is very economic ; ( 7 ) compared different schemes of cable placement for horizontal parallel steel truss, and the results showed that the local cable only unloaded the second girders, but had no response on the first girders and stomach poles, while global cable could unload the second girders and the stomach poles outside of turning point of cable, thus proving that global cable is more economic than local - cable
本文的主要工作是:對國內外預應力鋼結構的發展歷史及現狀作了綜述和總結,指出當前預應力鋼結構工程實踐中存在的主要問題;闡述了預應力鋼結構的受力機理,並指出預應力鋼結構的適用范圍和特點;在考慮結構應力和變位約束的條件下,建立預應力鋼結構優化設計模型;提出多次預應力鋼結構優化設計方法和步驟,採用線性規劃和滿約束準則相結合的優化方法,可優化設計出施加的每一級預應力的大小,並得到結構各部分的優化截面;對多次預應力最佳的施加次數作了分析,並建議以2 3次為宜;為驗證文中理論和方法,分別對大跨多次預應力鋼屋架、局部布索的水平平行弦鋼桁架、整體布索的水平平行弦鋼桁架和局部布索的超靜定鋼桁架等算例進行了優化設計,經濟效益明顯;對水平平行弦鋼桁架的幾種施加預應力的方案進行比較,對于局部布索,預應力只對下弦起到卸載作用,對上弦和腹桿基本不起作用;而整體布索預應力除對下弦卸載外,對索折點以外部分腹桿也起到卸載作用,經濟效益好於局部布索。But because of an indeterminate flexible structure with many degree of redundancy, its variant inner force under dead - loading, nonlinear behavior and the correlation between construction method and completed structure, especially incessant conversion of system in construction method, these must bring many complicated change to construction internal force and displacement. these main factors resulting in construction control analysis become more important in the design of cable - stayed bridge
但由於它屬于高次超靜定的柔性結構,恆載內力狀態具有多樣性、結構狀態呈非線性、施工過程與成橋狀態具有相關性,特別是在施工階段結構體系的不斷轉換,必然給橋梁結構帶來較復雜的內力和位移變化,這些特點使得斜拉橋的施工控制分析成為突出的研究課題。Analytic solution for bi - material cantilever beam under thermal and distributed load
單跨超靜定梁在均布荷載作用下的彈性力學解It ' s the first time clearly and systematically to present the concepts of restraint influence coefficient of steel to strain increment, to curvature increment and to deflection increment due to creep which are different each other. theoretical formulae are established, and approximate formulae are also obtained while considering the characteristics of common - used concrete and ambient condition of real bridges in china. so, an approximate restraint influence coefficient method to analyze the effect due to creep and shrinkage in pc bridges is put forward, and the equations to estimate second - force due to creep considering influence of steel in system - transferred continuous pc bridges is also established
本文首次清晰而系統地提出了鋼筋對徐變的不同效應(徐變應變、徐變曲率、徐變上拱)約束影響系數的概念,建立了相應的計算式;結合我國普遍採用的混凝土的徐變特性和橋梁的構造特點及工作中南大學博士學位論文摘要環境特徵,給出了具有較高計算精度的實用計算式;在此基礎上,建立了橋梁徐變效應近似分析的鋼筋約束影響系數法,並推導出了考慮鋼筋影響的超靜定梁徐變次內力的近似計算式,可方便地應用於橋梁研究和設計中。The connection flexibility influences not only displacements but also distribution of moments of frame. moments of joints of semi - rigid frame are more than that of semi - rigid frame that include more flexible connections
對于超靜定鋼框架,考慮p -效應后,半剛性連接的柔性不僅增大結構的位移,而且還改變結構的彎矩分佈。The results obtained from the modified genetic algorithm indicate the algorithm is feasible and effective by some representative examples
用典型的遺傳演算法測試函數和十桿超靜定桁架結構優化問題作為考題,驗證改進遺傳演算法的有效性與可行性。The effects of spans on the static behavior of indeterminate multi - span beams
跨徑比對超靜定連續梁靜力特性的影響The top beam can reform the force - bearing mechanism of the retaining piles because the cantilever piles can be fixed by adding a restriction on the top of the piles and the displacement of the piles can be reduced too. as the same time, top beam can harmonize the displacement and force of the piles and avoid the phenomenon of chain failure as one of the piles is destroyed. if the top beam are closed it can work well because the support on the two ends
樁頂圈樑對支護樁的作用主要體現在:改善支護樁的力學性狀,變懸臂樁為頂端約束的超靜定狀態;對樁頂位移起限製作用,減小基坑工程對周邊環境的不良影響;協調各樁之間的受力和位移,避免局部受力過大引起各樁之間的連鎖破壞現象。For example, the large friction loss of prestressed tendons, complex anchorage bearing joint, the problem of cracks in large area structure, axial compress of long span continuous beam under prestress. all those hinder its use in long span structure. until now days, the cognition about the behavior of such structure under loads is not enough for the realm of prestressed concrete of all the world
但是,預應力技術應用於大跨連續框架結構,在設計和施工中還存在一些缺點和不足,例如預應力筋的摩擦損失過大,節點錨固區設計和構造復雜、大面積結構的裂縫控制問題、大跨框架梁在預應力作用下的軸向縮短等,這些都是困擾大跨預應力混凝土框架結構應用的突出問題,特別是目前對于預應力混凝土超靜定結構的受力性能,國內外預應力界的認識尚不夠全面。The validity of the subsection simulation method is proved, in which postprocessing technology is widely used. the sixth, the static simulation is neces sarily to find out the dynamic system ' s initial state for dynamic simulation. the gun is looked upon as a hyper - equilibrium structure, and a so - called " parallel projection method " is brought forward for the gun ' s static simulation
提出了一種求解線性方程組的方法?平行投影法,針對adams對超靜定系統靜態分析不力的情況,研究了求解全炮靜態問題的途徑和方法,並應用平行投影法求解車體懸掛的初始平衡力,求得了較符合客觀事實的解,從而完成了火炮發射前的靜態分析。According to different transverse difference in temperature and lengthways difference in temperature, the paper gave the method of computing temperature effect including : 1 ) the stress ot1 caused by nonlinear difference in temperature. 2 ) the constrain stress o t2 in undetermined structures by equivalent difference in temperature. 3 ) the constrain stress ot3 caused in undetermined structures by even difference in temperature tm
針對具有不同性質的橫向溫差和縱向溫差,本文分別提出了預應力結構的溫度效應的計算方法,包括: 1 )非線性溫差引起的自約束應力_ ( t1 ) ; 2 )等效線性溫差引起的超靜定結構的約束太原理工大學碩士學位論文應力民3 )均勻溫差tw引起超靜定結構中的約束應力4 4 )均勻溫差tm引起梁的軸向變形受到柱的側向約束,與預應力筋的溫度變形之間的差異引起的預應力的變化。Hence, on the basis of research achievements of other countries, the mechanical characteristics of the statically indeterminate composite bridge is analyzed in this thesis by utilizing the large universal finite element software, msc / nastran and msc / patran, to promote the application and development of the composite bridge in china
為此,本文在總結各國研究成果的基礎上,利用大型通用結構分析程序msc nastran和msc patran ,對超靜定組合梁橋的受力特性進行了分析研究,目的是推動這一結構形式在中國的應用和發展。For the statically indeterminate structure of pestressed concrete, it is especially have the favor of the designers by its superiority
預應力混凝土超靜定結構,更是以其優越的結構性能備受設計人員的青睞。The comparison is made between the features of the statically indeterminate structures and the extra - statically ones under the higher temperature and normal temperature
另外比較了高溫下靜定結構與超靜定結構性能的差別,以及它們與常溫下結構性能的差別。Based on the steel - concrete coordinating relations, element stiffness matrix of geometrically nonlinear analysis, formulas for self - stresses by temperatures and displacements, stresses of corresponding superfluous structures are further studied. furthermore, a new theory and method for structural geometrical nonlinearity and buckling analysis is put forward
根據鋼混協作關系進一步推導出鋼混組合構件幾何非線性分析單元剛度矩陣、溫度自應力及鋼混超靜定結構溫度位移和應力的計算公式,建立了一種新的基於鋼混協作關系的異種材料組合構件的幾何非線性和結構穩定性分析方法。But that of supper quiet fixed structure can not be computed only with quiet equilibrium condition, it must be considered the flexible deformed coordinative condition of structure in same time
超靜定結構的支座反力和各截面的內力不能完全出靜力平衡條件叩。地確定,必須考慮結構的彈性變形協調條件確定之。Because continuous rigid frame bridge is a kind of multi - degree indeterminate structure, large internal force will be produced in the bridge structure due to the temperature effect. therefore, it is necessary to design the flexible pier with small lateral displacement rigidity, which calls for the decision of a reasonable ratio of beam bending rigidity to pier lateral displacement rigidity
此外,連續剛構橋是高次超靜定結構,溫度變化將引起較大的結構內力,需要設計抗推剛度較小的柔性墩以減小溫度內力,合理確定主梁與墩的剛度比值是設計的關鍵。However now days the cognition about the behavior of such structure under loads is not enough for the realm of prestressed concrete all of the word
但是,對于預應力混凝土超靜定結構的受力性能,國內外預應力界的認識還普遍不夠。分享友人