cross bar design 中文意思是什麼

cross bar design 解釋
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  • cross : n 1 十字架；〈the C 〉 耶穌受刑的十字架。2 〈the C 〉 基督教（教義，國家）。3 不幸，苦難；挫折，...
  • bar : BAR ＝ Browning automatic rifle 白朗寧自動步槍。n 巴爾〈南斯拉夫港市〉。n 1 棒，桿，條；棒狀物。2...
  • design : vt 1 計劃，企圖，立意要…。2 指定，預定；留給，留著。3 設計，草擬，擬定，籌劃；起草，畫草圖，打（...
  1. The optimal model of truss structure is established, in which the cross sectional areas of bar are taken as design variables, the structure weight is taken as objective function. in the process, the reliability of structural displacement and bar stress and the fundamental frequency are taken as constraint functions. from the engineering practice, all the reliability constraints, which are implicit generally with the design variables, are equalized and transferred to the conventional explicit constraints

    本文將主要考慮桁架結構的優化問題，首先建立數學模型，即以桁架的橫截面積為設計變量、以重量最小為優化目標，位移、應力等可靠性及基頻為約束條件；最後，從工程實際出發，對結構系統的可靠性隱形約束進行等價顯化處理，使之轉化為常規的橫截面積優化問題。
  2. At first, after the dynamic characteristics of the plane and the spatial supporting systems were studied, fore some steps fixed frequency and shape of vibration were gained. secondly, several design parameters which influence the dynamic characteristics of this kind system were discussed, including pre - tension value in the cable, cross - section of the cable, cross - section of steel - bar and form change. some applied decisions were found

    首先，對平面和空間索桁支承體系的自振特性進行研究，得到體系的前幾階固有頻率和振型形式；進而探討了索的預拉力、拉索截面面積、撐桿截面面積、形狀改變（撐桿長度l ）等主要設計參數對體系自振特性的影響，得出了一些有益的結論，為體系設計和施工提供意見和依據；最後，對體系的風振特性進行了分析，用幕墻風荷載規范對幾種索桁支承體系形式進行風荷載計算。
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