fore cross 中文意思是什麼
fore cross
解釋
正手斜線球-
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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