本文選題：水中懸浮隧道 + 沖擊荷載��； 參考：《合肥工業(yè)大學(xué)》2017年碩士論文

【摘要】：水中懸浮隧道作為一種新型的穿越水域的交通形式,通過結(jié)構(gòu)的自重、浮力和錨固系統(tǒng)的共同作用,維持在水中的平衡和穩(wěn)定。由于懸浮隧道自身所具有的經(jīng)濟(jì)性和環(huán)保性,其概念一經(jīng)提出,便獲得了各國科研工作者的廣泛關(guān)注。由于懸浮隧道所處的水下環(huán)境復(fù)雜,還有許多問題亟待解決。本文首先提出一種“V”型錨固結(jié)構(gòu)概念設(shè)計(jì),主要包含接頭結(jié)構(gòu)設(shè)計(jì)和錨索布設(shè)設(shè)計(jì),這種型新概念設(shè)計(jì)克服了傳統(tǒng)錨固結(jié)構(gòu)設(shè)計(jì)的局限性,充分發(fā)揮錨固結(jié)構(gòu)材料的作用,增加結(jié)構(gòu)的跨度,同時(shí)便于懸浮隧道管體水下對(duì)接和安裝,可為未來懸浮隧道的設(shè)計(jì)研究提供一種新的錨固結(jié)構(gòu)設(shè)計(jì)思路和重要的工程參考。隨后,為了研究懸浮隧道管體在動(dòng)力荷載作用下的位移響應(yīng)行為,本文首先建立等間距移動(dòng)荷載作用下的懸浮隧道動(dòng)力學(xué)模型,將懸浮隧道管體簡化為兩端設(shè)有阻尼的彈性支撐梁,并利用Galerkin法求解懸浮隧道的振動(dòng)位移方程,采用數(shù)值模擬方法獲得懸浮隧道的跨中時(shí)程響應(yīng),分析張力腿豎向剛度、移動(dòng)荷載大小、移動(dòng)速度和行車間距對(duì)懸浮隧道管體跨中位移的影響。結(jié)果表明:張力腿豎向剛度對(duì)懸浮隧道管體位移響應(yīng)的影響最明顯。其次,移動(dòng)荷載大小和速度以及行車間距也會(huì)顯著影響懸浮隧道管體的跨中位移。本文還建立沖擊荷載作用下懸浮隧道的動(dòng)力學(xué)模型,更進(jìn)一步的,將懸浮隧道簡化為等間距彈性支撐梁,運(yùn)用相同的分析方法,研究張力腿豎向剛度、沖擊物質(zhì)量、沖擊速度對(duì)懸浮隧道跨中位移的影響。結(jié)果表明:沖擊荷載作用下,張力腿豎向剛度對(duì)懸浮隧道位移響應(yīng)具有顯著影響,但這種影響具有極限性。另外,沖擊物質(zhì)量和沖擊速度也是影響懸浮隧道跨中振動(dòng)位移的主要因素。
[Abstract]:As a new type of traffic through the water area, the floating tunnel in water can maintain the balance and stability in the water through the joint action of structure weight, buoyancy and anchoring system. Because of its economy and environmental protection, the concept of suspended tunnel has been widely concerned by researchers all over the world. Because the underwater environment of the suspended tunnel is complex, there are still many problems to be solved. In this paper, a concept design of "V" type Anchorage structure is put forward, which mainly includes the design of joint structure and the design of anchor cable. This new concept design overcomes the limitation of the traditional design of Anchorage structure and gives full play to the function of the Anchorage structure material. Increasing the span of the structure and facilitating the underwater docking and installation of the pipe body of the suspended tunnel can provide a new design idea and an important engineering reference for the design and research of the suspension tunnel in the future. Then, in order to study the displacement response behavior of the suspended tunnel tube under the dynamic load, the dynamic model of the suspension tunnel under the moving load with equal spacing is first established in this paper. The suspension tunnel tube is simplified as an elastic support beam with damping at both ends, and the vibration displacement equation of the suspension tunnel is solved by Galerkin method. The mid-span time-history response of the suspended tunnel is obtained by numerical simulation, and the vertical stiffness of the tension leg is analyzed. The effect of moving load, moving speed and driving distance on the mid-span displacement of suspended tunnel tube. The results show that the vertical stiffness of the tension leg has the most obvious effect on the displacement response of the suspended tunnel tube. Secondly, the magnitude and speed of moving load and the distance between vehicles will significantly affect the mid-span displacement of the suspended tunnel tube. The dynamic model of suspension tunnel under impact load is also established in this paper. Furthermore, the suspension tunnel is simplified as an elastic support beam with equal spacing, and the vertical stiffness and impact mass of the tension leg are studied by the same analytical method. The effect of impact velocity on the mid-span displacement of suspension tunnel. The results show that the vertical stiffness of the tension leg has a significant effect on the displacement response of the suspension tunnel under impact loading, but this effect is limited. In addition, the impact mass and impact velocity are also the main factors affecting the vibration displacement of suspension tunnel.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U459.5

【參考文獻(xiàn)】

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本文編號(hào)：1811757