【摘要】：為探究懸索的自重、剛度及分布荷載對懸索的靜態(tài)平衡位形的影響,通過懸索狀態(tài)分類與懸索單元的受力分析與數(shù)學模型,引入無量綱參數(shù),分析了懸索在自然態(tài)、無荷自重作用狀態(tài)與有分布荷載作用狀態(tài)下的基本靜態(tài)性能。建立了考慮自重和分布荷載同時作用下的懸索靜態(tài)張力與懸索單位長度重剛比、撓度及支座間距的數(shù)學模型。研究表明:當重剛比小到一定程度時(β≤10-2),懸索的靜態(tài)位形基本重合,此時懸索的剛度對靜態(tài)位形起主導作用,懸索的靜態(tài)位形可以看成不可伸長的懸索進行處理;重剛比很大時(β≥10-1),懸索的自重與分布載荷對靜態(tài)位形起主導作用,懸索自重與分布荷載越大,懸索的中央撓度也越大。重剛比小的懸索在接近原長跨距時,最大張力與水平張力會明顯增大,但重剛比大的懸索增加的幅度不明顯,說明重剛比大的懸索因為彈性模量小,主要產生了彈性變形,因此不能盲目拉緊懸索。最后利用掛重法對懸索的靜態(tài)位形參數(shù)進行了實驗驗證,實驗結果與理論結果的相對誤差均在4.95%以內,說明了模型的可行性并達到了工程應用相對誤差不超過5%的精度要求。
[Abstract]:In order to investigate the influence of the weight, stiffness and distributed load of the suspension on the static equilibrium configuration of the suspension, through the classification of the state of the suspension and the force analysis and mathematical model of the cable element, the dimensionless parameters are introduced to analyze the natural state of the suspension. The basic static performance of load free and distributed load state. A mathematical model of the ratio of static tension to unit length, deflection and support spacing of suspension cable is established considering both weight and distributed load. The results show that when the ratio of weight to stiffness is small to a certain extent (尾 鈮，

本文編號：2324316