calculated span 中文意思是什麼

calculated span 解釋
計算跨徑
  • calculated : adj. 1. 有計劃的,有意的,故意的。2. (預備)供…之用的,合於…之用的。3. 算清了的;被預測出的。
  • span : n 1 一?〈手指張開時,拇指尖至小指尖的長度,通常九英寸〉。2 (常有短的涵義的)一段時間;很小的間隔...
  1. According to roof safety factor of 1. 2 for the mined - out area, minimum safety roof thickness at different rock in various span mined - out area was calculated by flac software, which transfixion of plastic zone was taken as criteria of roof breakage by using strength reduction technology and dichotomy theory

    摘要利用強度折減技術和二分法原理,以塑性區的貫通作為頂板破壞的標準,當采空區頂板的安全系數等於1 . 2時,利用flac軟體計算得出各種跨度空區在不同巖層中的最小安全頂板厚度。
  2. Furthermore, the isoline maps of mean wind pressure coefficients and rms wind pressure coefficients of the structure under various wind directions are plotted. in the matter of theoretical analysis, modeling with finite element method, using the local mean wind pressure coefficients and time history of fluctuating pressures determined in wind tunnel, the wind - induced dynamic responses for long - span grid roof structures are calculated in frequency domain and time domain separately

    在理論分析方面,建立合理的有限元模型,利用剛性模型風洞試驗獲得的各種不同情況下屋面各節點的平均風壓系數和脈動風壓時程,在頻域內和時域內進行了大跨網架屋蓋結構的風振響應分析。
  3. The maximal load - carrying capability of the arch support is calculated by adopting mechanical model of curved beam based on its force analysis, and relationship between bearing capacity coefficient of small curvature arch support and radius and span of curved beam is gained based on supporting capacity comparison of curved beam and straight beam

    採用曲梁模型進行了支架系統的受力分析,得到其最大承載能力;通過與直梁支架承載能力相比較,得到了小曲率拱型支架承載能力系數與曲梁跨度和半徑的影響關系。
  4. Chapter two discourses the basic theory, calculation model and main advantages and disadvantages of regression analysis and time series analysis. chapter three discusses grey system theory in detail, including the basic theory, grey incidence analysis, model in common use and forecasting method. chapter four analyzes the results of flexibility deformation of 270 meters span continuous rigid frame bridge of humen bridge, calculated with regression, time series and grey system model

    第1章介紹了變形監測的目的、意義、分類以及變形分析與預測研究的現狀和進展;第2章論述了回歸分析和時間序列分析的基本理論、計算模型和主要優缺點:第3章詳細討論了灰色系統理論,包括建模的理論基礎、灰色關聯分析、常用模型和預測方法;第4章為採用回歸模型、時間序列模型、灰色系統理論模型,對虎門大橋270米混凝土連續剛構橋施工中的撓度變形進行的計算分析。
  5. In allusion to section modality and transverse joint of common span bridges, we choose two kinds of calculating theories in transverse distributing calculate process : the theory of rigidity crossbeam and the theory of hinged girder and slab. making the use of the theory of optimized design, i constitute mathematics model and choose appropriate calculated method. and find the form and detail dimension of section when beams of the bridge satisfy bending moment ^ shearing force and torsional moment

    在用橫向分佈理論計算單梁扭矩過程中,針對現有常用跨徑橋梁的截面形式和橫向連接狀況,選取了兩種計算理論:剛性橫梁法和鉸接梁(板)法,利用結構優化設計原理,建立主梁承載力的數學模型,選擇合適的優化計算方法,得出在滿足彎剪扭承載力要求時主梁的細部尺寸。
  6. The author designed, made, processed and tested to the plexiglass model and the bridge. then author calculated and analyzed the results, as a result of the computer programs bsas, sap, qjx and nastran. the author researched the force characteristics and structural behavior of large - span prestressed concrete bridges with continuous rigid frame structure, used the advanced theory and technology, materials, arts and crafts to resolve the practical matters in design and construction, to optimize structure, and to provide credible technical data for the design and construction and maintenance of bridges

    本文以吉林省九站松花江特大橋為研究對象,通過有機玻璃模型的設計製作及加工和試驗,以及對已竣工通車的實橋荷載試驗,利用計算機程序bsas 、 sap 、 qjx及nastran等程序進行理論計算和綜合對比分析,探討大跨徑預應力砼連續剛構橋的力學特點和使用性能,運用先進的理論、技術、材料、工藝等來解決設計和施工中存在的實際問題,優化結構,並為橋梁的設計、施工及使用維護等提供可靠的技術資料。
  7. The dynamic behavior of a long span cable - stayed bridge ( north bridge of runyang yangtse river bridge ) is calculated, the frequency response function ( frf ) is compressed using principal component analysis ( pca ), and the frf is then reconstructed based on a few, principal components

    摘要針對潤揚長江大橋北漢斜拉橋進行動力分析,採用主元分析對其頻響函數進行了有效降維,並根據降維后的主元重構了結構頻響。
  8. The rules obtained from the background modal analysis method based on the quasi - steady assumption in frequency - domain are similar to those obtained by the analysis method in time - domain, and the influence of high modes can be considered. finally, the dissertation suggests that for engineering design, it is better to use equivalent wind load factor defined the ratio of wind - induced total displacement to static displacement for computing the equivalent static wind load of long - span grid roof structures, and the equivalent wind load factor of the roof of taizhou stadium is calculated

    最後通過對大跨網架屋蓋結構的風振系數的研究,提出了在實際工程設計中,採用位移風振系數來計算大跨屋蓋的等效靜力風荷載既正確又方便使用,並且給出了臺州體育中心看臺屋蓋進行分塊統計后的位移風振系數,以供設計參考。
  9. To our satisfaction, all the measuring results from the measurement locale are accurate and convincing comppared with the results calculated by the theory which makes it clear that the system can meet the demands of measuring upon the dafosi bridge of changjiang river. the system has achieved the long - time and real - time automatic deflection measurement of the bridge at first time in our country, and the system has passed the appraisal of the experts consigned by the ministry of communications so the system has the practical value on the long - span bridge ' s deflection measurement

    通過對橋梁實際測量結果與理論計算的結果的對比分析可知,本文所設計的連通管式光電撓度測量系統測量數據準確,系統可靠,能夠滿足大佛寺長江大橋撓度測量的需要。該撓度測量系統首次在國內實現了橋梁主梁撓度的長期實時自動監測,並且已經通過了交通部的項目驗收,具有一定的推廣價值
  10. In frequency - domain, the background mode that has the most contribution to the buffeting energy of the structure is calculated using the background modal analysis method, thus the rms of the dynamic responses of long - span grid roofs is obtained. on the other hand, the rms of the dynamic responses is also obtained by direct integral method in time - domain. after the comparison of the results of two methods, several important conclusions can be made

    在頻域內,採用背景模態分析法,通過計算得到對結構振動能量貢獻最大的一階背景模態,從而得到結構脈動響應的均方根值;在時域內,採用直接積分法求出結構響應的時間歷程,並且通過統計,同樣得到結構脈動響應的均方根值。
  11. In this thesis, finite volume method and dual - time stepping method are employed to solve the 3 - d unsteady euler equations. the unsteady flow field around a finite - span flapping wing is simulated. the lift and thrust of the flapping wing for different cases are calculated

    本文運用有限體積法結合雙時間推進技術求解三維非定常歐拉方程,模擬了有限翼展機翼在同時具有上下拍動和俯仰運動狀態下的非定常流場,計算了不同狀態下撲翼的升力及推力,分析了各個影響因素對撲翼氣動特性的影響。
  12. The dynamic characteristics of lightweight steel structure are also respectively calculated and analyzed in single span or whole structure. the computational results show that the out - planar stiffness has great influences on dynamic characteristics during the single span calculation ; in the total structural analysis the crane has no evidently effect on dynamic characteristics with contrast to single span

    對輕鋼廠房結構的單跨和整體結構進行了動力特性計算分析,結果表明平面外剛度對動力特性的影響非常顯著,在空間結構模型分析中吊車質量對結構的影響並未比平面單跨情況下來得明顯。
  13. Abstract : with the increasing of suspension bridge ? s span, the gravity stiffness of suspension cable itself is more important than vertical deflection resistance stiffness of stiffening girder which is serviced for the whole structure. in order to provide more knowledge of gravity stiffness of suspension cable, in this paper, gravity stiffness of suspension cable is formulated briefly and theoretically in case of ignoring the existing of the stiffening girder. the deformation and internal force of suspension cable can be calculated approximately in this way

    文摘:隨著懸索橋跨度的增大,加勁梁的豎向抗彎剛度提供給整個橋跨結構的剛度僅佔次要地位,而懸索自身的重力剛度卻佔有重要的作用.為加深對重力剛度的進一步認識,筆者對特大跨度的懸索橋的重力剛度進行簡要的理論推導,在忽略加勁梁存在的情況下,可近似地計算懸索橋的變形和內力
  14. Dynamic performance of pingsheng bridge and the ground - anchored suspension bridge model, which has the same structural parameters as pingsheng bridge, is calculated. furthermore, the influence on dynamic performance for pingsheng bridge of structural parameters, such as rise - span ratio of main cable, dead load

    6 .針對大跨度自錨式懸索橋可能存在的風致振動,對平勝大橋進行了節段模型和全橋模型風洞試驗研究,研究表明:平勝大橋具有足夠的抗風穩定性。
  15. Using the finite element method considering the influence of the stiffened girder, the cable system of sanchaji self - anchored suspension bridge with the main span of 328m is calculated and analyzed based on the programme which programmed by apdl language

    本文運用考慮加勁梁剛度影響的有限元法,基於ansys的apdl語言,編制了計算機程序,對主跨328m的三汊磯自錨式懸索橋的主纜系統進行了計算分析。
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