等值梁法 的英文怎麼說
中文拼音 [děngzhíliángfǎ]
等值梁法
英文
equivalent beam method-
Also, the thesis calculate and analysis the transverse deflection of steel box girder deeply in multiple factors. firstly, the article introduced the calculative methods and theory of local stress and strain of bridge structure. then program software system of finite element method was introduced. after that, the influential factors to the calculatial result and their values were analysed and suggested
本文首先介紹了橋梁結構局部應力應變計算理論和方法,對有限元計算程序進行了介紹,然後分析了縱橫隔板設置、梁高及梁寬變化等因素對鋼箱梁橋面板在恆載作用下的橫向撓度的影響,並將這些計算結果進行對照分析,從而找出了影響橋面板橫向撓度的主要影響因素,並得出了相應的數值可供工程實踐參考。From the feature of the force and deformation of the tpih, 5 different elements are used to mesh the different zones of the tube, which are structural beam 3d elastic 4, structural pipe plastic straight 20, structural pipe elastic elbow 18, structural shell elastic 4 node 63 and contact 3d pt - to - surf 49 ; the contact problem is assumed to be flexible - to - flexible ; the temperature field is assumed to be body load. a mechanical model corresponding to reality has been established for numerical simulation. based on the above, the 3 - d fem numerical simulation of tpih has been carried out by using the ansys program
針對加熱彎管過程的受力和變形特點,採用三維梁單元、三維塑性直管單元、三維彈性曲管單元、三維殼單元與三維點對面接觸單元等5種不同的單元分別對管毛坯不同區域進行劃分,並對接觸單元採用柔體-柔體的處理方法,將溫度場作為體載荷處理,建立了符合實際的加熱彎管問題數值模擬力學模型:在此基礎上,應用商用軟體ansys對加熱彎管過程進行三維有限元模擬與研究,獲得了成形時推力、彎矩、支撐力大小及其變化趨勢。According to eigenvalue equation ( general formula ) of the energy method of the plane steel frame structure stability, and considering the restriction of the end of the column of the main steel frame and function of deflection curve gained from the differential balance equation general resolution, we get the equation for calculating the length coefficient of the main frame structure stability of the steel arch gate and the resolutions are also given
根據平面剛架穩定性能量法特徵值方程(通式) ,考慮弧形鋼閘門主框架柱的柱端約束的特殊情況,求出撓曲線函數(試解函數)通解,得到弧形鋼閘門主框架柱穩定性計算長度系數方程。其中弧門主框架主橫梁式形框架的臨界荷載比較現行規范推薦的有限元法簡單方便、結果精確及物理概念明確等優點。Considering the stiffened plate as a composite system of grillage beams and slab, the superstructure as an equivalent rigidity plate, a semi - analytical and semi - numerical method, which makes use of compatible analysis of force and displacement among beams and slabs and columns and ground, is developed to analyze interaction between stiffened raft foundation and subsoil considering the rigidity of superstructure
摘要將彈性地基上的梁板式矩形筏基視為十字交叉梁與平板組合體系,上部結構剛度簡化為等效剛度板,採用半數值、半解析方法,通過梁、板、柱以及地基之間力與位移平衡協調分析,可得到考慮上部結構剛度時梁板式筏基寫地基共同作用的半數值、平解析解。Firstly, for the system of moulding board and support frame in construction the side pressure and screws are analyzed. the material and structure form of support frame are discussed. the design of support frame uses the method of limited state, and also it analyses the integer stability, part stability, and single stability, and then proposes the load analysis of multi - level support frame
首先,針對轉換層梁模體系及支撐架施工,重點分析了轉換層結構現澆混凝土對模板側壓力值及模板對拉螺桿的計算;討論了轉換層支撐體系的形式及構造,詳細論述了基於極限狀態設計的支撐架計算方法,包括縱橫向水平桿的強度驗算、立桿的整體穩定性、局部穩定性、單肢桿件穩定性等驗算,並提出了多層支撐架的施工荷載計算方法。Chairman of hong kong bar association, both point out that a large number of lawyers have been giving free legal advice through the duty lawyer service for many years. with the strengthening of social service and community networking brought about by the clsc project, they call upon more lawyers to volunteer working for the community
香港律師會會長蔡克剛及香港大律師公會主席梁家傑分別指出,多年來律師已透過當值律師服務參與提供免費法律指導計劃,加強社會服務及社區聯系等元素后,他們將鼓勵更多律師參與社區義務工作。Then, author introduces geometric nonlinear analysis theory, geometric nonlinear calculation theory during construction period, load position of live load considering geometric nonlinear and calculation theory of worst - case value, static time history theory for vehicle running, geometric nonlinear analysis theory of natural vibration and structural dynamic reaction and so on. all of these theories fit any appointed structure with corresponding programs. so a series of completed analysis approaches that cover all geometric nonlinear factors of bridge structure are formed
其次,介紹了對任意指定結構的幾何非線性分析原理、施工階段幾何非線性計算原理、考慮幾何非線性的活載加載位置與最不利值的計算原理、車隊行駛靜力時程分析原理、非線性結構的自振特性和結構動力反應分析原理等,其中包含了相應的計算程序模塊的編制方法,形成了一整套考慮橋梁結構所有幾第日頁西南交通大學博士研究生學位論文何非線性因素的橋梁結構分析方法。The paper, in the light of my bureau ' s construction experience and project practice in constructing large span prestressed continuous beam bridge ( continuous rigid frame ) in recent dozens of years, introduces a new thinking about the standardized design of cable - stayed hanging basket and the standardized construction technology of the continuous beam bridge ( continuous rigid frame ), gives the detailed account of a series of construction technique and achievements such as : the development and construction ways of large span continuous beam bridge, the standardized design thinking and operation of cable - stayed hanging basket, the standardized construction technology of the continuous beam bridge ( continuous rigid frame ) etc., meanwhile, it is attached with a whole set of detailed standardized design sample drawings of cable - stayed hanging basket
本文根據我局十幾年來修建大跨度預應力連續梁(連續剛構)橋的施工經驗和工程實例,介紹了一種斜拉式掛籃標準化設計的新思路及連續梁(連續剛構)橋標準化施工工藝。詳細敘述了大跨度連續梁橋的發展、施工方法、斜拉式掛籃標準化設計思路及做法、連續梁(連續剛構)橋標準化施工工藝等一系列施工技術及成果,並附有全套詳細的斜拉式掛藍標準化設計定型圖。對同類型橋梁的施工及掛籃設計具有參考價值。Analysis system for bridge test ( qljc in chinese ) is an application software specially designed for bridge test to build spatial fem model of bridge structure with beam elements or solid elements, analyze the static and dynamic character of bridge structures, calculate efficiency ratio of load test, pick up the results of observation points and so on
摘要橋梁結構檢測分析系統qljc是針對橋梁檢測試驗分析開發的專用軟體,能夠建立橋梁結構空間有限元模型,運用實體單元法和空間梁格法進行靜動力試驗分析、試驗荷載效率計算,查取測點位置理論計算值等。By using the calculating method of the flat - plate floor, the bend moments of the slab in different place are calculated. the moment distribution ratio between the column trip and the middle trip of the cast - in - place reinforced concrete hollow flat - plate floor calculated by the equivalent frame method is demonstrated. the moment of the cast - in - place reinforced concrete hollow flat - plate floor calculated by the experience coefficient method is also demonstrated
進而將無梁樓蓋體系的計算方法應用於現澆空心板無梁樓蓋中,通過對板格彎矩的分析,得出了現澆空心板無梁樓蓋按等效框架法計算的板帶彎矩分配比例系數,按經驗系數法計算的板帶彎矩設計值。Secondly, two carbon fiber reinforced composite beams were fabricated, and their modal frequencies were measured by an experiment method. thirdly, delaminations were modeled by pairs of nodes with the same coordinates but different node numbers, while the modal frequencies of these beams with different delamination location and size were computed by an eas piezoelectric solid element. moreover, a novel method combining computational mechanics and neural network was demonstrated for composite health monitoring ; the first five flexure modal frequencies obtained by fem were modified by a primary revising approach and were used to train the neural network
本文較全面地評述了神經網路的應用模型、改進演算法等,編制了bp神經網路程序:制備了纖維增強復合材料試件,並進行實驗模態分析;利用坐標相同、節點號不同的方法模擬脫層損傷,基於eas列式的壓電固體單元計算了不同脫層損傷情況下的頻率信息;針對基於實驗數據訓練神經網路存在樣本不足的缺陷,本文提出了利用有限元方法對含有脫層損傷的復合材料試件進行數值模擬,以前五階彎曲模態頻率構建訓練樣本的新思路,並提出了一種初步的計算值修正方法,以此構建神經網路的訓練樣本:將實驗模態分析的結果送入訓練好的神經網路進行預測,實現了對復合材料梁的脫層損傷的定位和損傷程度的評估。( 3 ) based on the hierarchy assessment model, a neural network method to assess the damage in bridges is put forward. the scores of assessment factors being made the input value and the score of damage assessment the output value, a multilevel assessment model for bridges came into being, which in turn could come to the final result of the bridge as a whole and get the damage rating according to the given standard
( 3 )在橋梁損傷評估層次結構模型的基礎上,提出了基於神經網路的橋梁損傷評估方法,以評價指標的評分值作為輸入,以損傷評估值作為輸出,建立了橋梁損傷多級評估模型,從而得出橋梁損傷的評估結果,並根據給定的標準,確定橋梁的損傷等級。Abstract : a new method, collaborative allocation ( ca ), is proposed to solve the large - scale optimum allocation problem in aircraft conceptual design. according to the characteristics of optimum allocation in aircraft conceptual design. the principle and mathematical model of ca are established. the optimum allocation problem is decomposed into one main optimization problem and several sub - optimization problems. a group of design requirements for subsystems are provided by the main system respectively, and the subsystems execute their own optimizations or further provide the detailed design requirements to the bottom components of aircraft, such as spars, ribs and skins, etc. the subsystems minimize the discrepancy between their own local variables and the corresponding allocated values, and then return the optimization results to main optimization. the main optimization is performed to reallocate the design requirements for improving the integration performance and progressing toward the compatibilities among subsystems. ca provides the general optimum allocation architecture and is easy to be carried out. furthermore, the concurrent computation can also be realized. two examples of optimum reliability allocation are used to describe the implementation procedure of ca for two - level allocation and three - level allocation respectively, and to validate preliminarily its correctness and effectiveness. it is shown that the developed method can be successfully used in optimum allocation of design requirements. then taking weight requirement allocation as example, the mathematical model and solution procedure for collaborative allocation of design requirements in aircraft conceptual design are briefly depicted
文摘:探討了一種新的設計指標最優分配方法- -協同分配法,用於處理飛機頂層設計中的大規模設計指標最優分配問題.分析了飛機頂層設計中的設計指標最優分配特徵,據此給出了協同法的原理並建立了數學模型.協同法按設計指標分配關系將最優分配問題分解為主系統優化和子系統優化,主優化對子系統設計指標進行最優分配,子優化以最小化分配設計指標值與期望設計指標值之間的差異為目標,進行子系統最優設計,或對底層元件(如飛機翼梁、翼肋和翼盒等)進行設計指標最優分配,並把最優解信息反饋給主優化.主優化通過子優化最優解信息構成的一致性約束協調分配量,提高系統整體性能,並重新給出分配方案.主系統與子系統反復協調,直到得到設計指標最優分配方案.兩層可靠度指標分配算例初步驗證了本文方法的正確性與可行性,三層可靠度指標分配算例證明了本文方法的有效性.最後,以重量指標分配為例,簡要敘述了針對飛機頂層設計中設計指標協同分配的數學模型和求解思路A new method, collaborative allocation ( ca ), is proposed to solve the large - scale optimum allocation problem in aircraft conceptual design. according to the characteristics of optimum allocation in aircraft conceptual design. the principle and mathematical model of ca are established. the optimum allocation problem is decomposed into one main optimization problem and several sub - optimization problems. a group of design requirements for subsystems are provided by the main system respectively, and the subsystems execute their own optimizations or further provide the detailed design requirements to the bottom components of aircraft, such as spars, ribs and skins, etc. the subsystems minimize the discrepancy between their own local variables and the corresponding allocated values, and then return the optimization results to main optimization. the main optimization is performed to reallocate the design requirements for improving the integration performance and progressing toward the compatibilities among subsystems. ca provides the general optimum allocation architecture and is easy to be carried out. furthermore, the concurrent computation can also be realized. two examples of optimum reliability allocation are used to describe the implementation procedure of ca for two - level allocation and three - level allocation respectively, and to validate preliminarily its correctness and effectiveness. it is shown that the developed method can be successfully used in optimum allocation of design requirements. then taking weight requirement allocation as example, the mathematical model and solution procedure for collaborative allocation of design requirements in aircraft conceptual design are briefly depicted
探討了一種新的設計指標最優分配方法- -協同分配法,用於處理飛機頂層設計中的大規模設計指標最優分配問題.分析了飛機頂層設計中的設計指標最優分配特徵,據此給出了協同法的原理並建立了數學模型.協同法按設計指標分配關系將最優分配問題分解為主系統優化和子系統優化,主優化對子系統設計指標進行最優分配,子優化以最小化分配設計指標值與期望設計指標值之間的差異為目標,進行子系統最優設計,或對底層元件(如飛機翼梁、翼肋和翼盒等)進行設計指標最優分配,並把最優解信息反饋給主優化.主優化通過子優化最優解信息構成的一致性約束協調分配量,提高系統整體性能,並重新給出分配方案.主系統與子系統反復協調,直到得到設計指標最優分配方案.兩層可靠度指標分配算例初步驗證了本文方法的正確性與可行性,三層可靠度指標分配算例證明了本文方法的有效性.最後,以重量指標分配為例,簡要敘述了針對飛機頂層設計中設計指標協同分配的數學模型和求解思路Based on the grass type lakes wetland resources ’ character, the economics theory and method is applied in the paper on the base of the investigation and experiment to analyses the asset value type of the wetland resources and to evaluate the values in wuliangsuhai lake wetland. researching value, travel consumption method, robert constanza method, market value method, assets value method, contingent valuation method. the conclusion can be drawn that the total assets value of the wuliangsuhai lake wetland is rmb 2. 824 billion yuan ( us $ 0. 352 million )
根據典型乾旱區草型湖泊烏梁素海濕地保護區自然、社會和流域特徵,在調研的基礎上,從資源經濟學、環境經濟學角度對其價值進行分析,運用市場價值法、分組旅行費用法、生態價值法、影子工程法、炭稅法、條件價值法等方法,分別對烏梁素海濕地直接使用價值、間接使用價值及目前非使用價值進行貨幣化評估,進而得出烏梁素海濕地總經濟價值。The empirical research in em forthers the acaden1ic thoughts of accrual - basis accounting, hastens the development of generally accepted accounting principles, and enriches the research measures in empirical accounting lots of literatures on em have been reported rece11tly however, researcheres have n ' t reached the consensus in most issues in this fieid much of the controversy over the interpretation of the literature ' s tindings is due to the extensive use of aggregate accruals models that mostly origil1ated from jones mode1 given the limlted theory, we have of how accruals behave in the absence of discretion, the task of identifying and controlling for potentially correlated o111itted variables is daunting indeed an alternative to study aggregate accruals is the 111ethodology for identifying earnings management developed by burgstahler and dichev ( l997 ) based on the distribution of earnings after management however, this measure is flawed by its silence about the form and extent of earnings management my dissertation intends to bridge the traditional aggregate accruals models and the new earnings distribution method, which is the first aim of this paper there is no doubt that earnings management is more rampant in china when compared with what has been documented for the west, since china ' s accounting standards are much too incomplete to of lbr clear guida11ce on many accounting transactions
文章首先指出了研究盈餘管理的三種方法各自的優點及不足,然後創造性地發展了前人的研究手段,在傳統的瓊斯模型及新的盈餘分佈方法之間找到了溝通的橋梁,並建立了一個嶄新的模型:瓊斯?閾值模型。通過對美國18 , 160家上市公司在1980 - 1999的20年間的40餘萬觀測樣本的實證研究表明,美國上市公司與我國上市公司一樣也存在著以獲取正盈餘及維持近期業績為目的的盈餘管理;公司經理人員使用可操縱性應計利潤為其管理盈餘的手段;經理人員因追求正盈餘或試圖維持近期業績而管理盈餘時體現出不同的行為方式。對美國上市公司的成功運用,證明我們的新模型在判斷盈餘管理存在與否、手段如何、動機怎樣等方面均比目前正在學術界流行的盈餘分佈法具有更強的檢測能力。Abstract : in this paper, a new simple method is put forward to on - line survey and analyse the real - time response of bridges loaded under random vehicles and people. based on linear elastic hypothesis and finite element method, the dynamic whole displacement state and load of the bridge can be obtained through surveying partial displacements, so the problem that load is unknown and difficult to determine when calculating is solved in a sense. this method is adap ted to girder bridge, arch bridge, cable - stayed bridge and suspension bridge. through the instrumentality of ways and means in this treatise, a real - time system to survey and analyse a working bridge can be established
文摘:在線彈性假設基礎上,根據有限元理論和橋梁隨機車輛(行人)荷載的特點,討論並提出了一種通過監測部分位移,計算橋梁其餘位移和橋面荷載的簡化分析方法,解決了橋梁在隨機車輛(行人)荷載作用下的荷載確定問題,建立了動位移和等效節點荷載的有限元列式.該方法為橋梁結構的在線監測和實時分析提供了理論基礎,適用於連續梁橋、拱橋、斜拉橋和懸索橋等橋梁結構形式,具有實際應用價值The paper derived the formulae for the strain response mode with the knowledge of dynamics of structures, of materiaj mechanics, of elastic mechanics, and pointed out their use range. a computer program is worked out with fortran power stations 4. 0, it can compute the characteristic value, the characteristic vector and the strain mode for a bridge structure, and it is verified correct
論文綜合結構動力學、材料力學、彈性力學等知識推導出橋梁結構應變響應模態模型的數學公式,指出了該方法的適用范圍,基於fortranpowerstation4 . 0計算機工作平臺,用fortran語言編制了能h算橋梁結構特徵值及特徵向帛羽小於變模態的哭小m序。Several advices of the aseismic design of buried structures are given in conclusion. the method to realize the analysis of soil - buried structure dynamic interaction is also valuable even to the analysis of building structures, bridges and dynamic machine foundations, etc
文中所論述的利用通用有限元分析軟體ansys實現土-地下結構體系動力計算的方法,對地面建築結構、橋梁結構的抗震分析、機械動力基礎分析等也具有參考價值。Equivalent beam method
等值梁法分享友人