本文關(guān)鍵詞： 水中懸浮隧道 內(nèi)波 海流 Morison公式 動(dòng)力響應(yīng) 振動(dòng)控制　出處：《合肥工業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：水中懸浮隧道是一種創(chuàng)新型交通跨越方式,在深海、超長(zhǎng)距離、環(huán)境敏感等特殊水域地區(qū),能有效的解決環(huán)境問(wèn)題、降低工程造價(jià)以及具有優(yōu)越的抗震特性。盡管目前全世界仍沒(méi)有一座懸浮隧道建成,但其設(shè)計(jì)理念早已成為與傳統(tǒng)交通方式(如跨海橋梁、沉管隧道和海底隧道)相競(jìng)爭(zhēng)的一種富有吸引力的技術(shù)選擇。作為一種創(chuàng)新技術(shù),其借助水的浮力使封閉的管體結(jié)構(gòu)懸浮在水中,并通過(guò)張力腿系統(tǒng)錨固在海床上,在海洋結(jié)構(gòu)工程中懸浮隧道具有獨(dú)特的優(yōu)勢(shì)。本文針對(duì)這一新型結(jié)構(gòu)物,考慮了海洋環(huán)境內(nèi)的兩種典型荷載(內(nèi)波和海流)的聯(lián)合作用,分析研究了組合荷載作用下水中懸浮隧道的動(dòng)力特性和力學(xué)行為,并以擬建工程為背景,對(duì)懸浮隧道進(jìn)行了振動(dòng)響應(yīng)及控制分析,具體開(kāi)展的工作包括：(1)基于勢(shì)流函數(shù)理論建立了層化海洋內(nèi)波流場(chǎng),疊加海流流場(chǎng)形成聯(lián)合作用場(chǎng),采用Morison公式考慮內(nèi)波和海流聯(lián)合作用力,建立懸浮隧道-流體相互作用非線性振動(dòng)數(shù)學(xué)物理模型。運(yùn)用Galerkin法數(shù)值求解結(jié)構(gòu)的振動(dòng)方程,研究了海洋內(nèi)波和海流共同作用及海流單獨(dú)作用下水中懸浮隧道的多模態(tài)動(dòng)力響應(yīng)行為。(2)根據(jù)懸浮隧道擬建工程在聯(lián)合作用下的動(dòng)力響應(yīng)特性,結(jié)合隧道結(jié)構(gòu)本身和聯(lián)合荷載的固有特性,提出了有效的減振措施。首先建立隧道管體的梁模型,將隧道模擬為簡(jiǎn)單梁和剛性梁的疊加梁,即振型近似為一個(gè)彎曲正弦模態(tài)和一個(gè)剛體模態(tài)的疊加；然后建立隧道結(jié)構(gòu)與聯(lián)合荷載之間的減振關(guān)系,控制由聯(lián)合荷載導(dǎo)致的懸浮隧道的自由振動(dòng)而非受迫振動(dòng)來(lái)減小隧道的振動(dòng)幅值,從而實(shí)現(xiàn)振動(dòng)控制的目標(biāo)：最后,通過(guò)對(duì)懸浮隧道擬建工程的減振響應(yīng)的分析,驗(yàn)證和評(píng)價(jià)了減振措施的有效性,并對(duì)懸浮隧道的結(jié)構(gòu)設(shè)計(jì)提出了參考性建議。
[Abstract]:Underwater suspended tunnel is an innovative way of traffic crossing. It can effectively solve environmental problems in special water areas such as deep sea, ultra-long distance, sensitive environment and so on. Although no suspension tunnel has been built in the world at present, its design concept has already become the traditional mode of transportation (such as bridge across the sea). As an innovative technology, the closed tube structure suspends in water by means of the buoyancy of water. And the tension leg system anchoring on the seabed, in the marine structure engineering suspension tunnel has a unique advantage. This paper aims at this new structure. Considering the combined action of two typical loads (internal wave and current) in the marine environment, the dynamic characteristics and mechanical behavior of underwater suspended tunnel under combined loads are analyzed and studied. The vibration response and control of suspended tunnel are analyzed. The specific work includes: 1) based on the theory of potential current function, the wave current field in stratified ocean is established, and the superposition current field forms the joint action field. The combined forces of internal wave and current are considered by Morison formula. A mathematical and physical model of nonlinear vibration of suspension tunnel-fluid interaction is established, and the Galerkin method is used to numerically solve the vibration equation of the structure. The multi-modal dynamic response behavior of underwater suspended tunnel under the interaction of ocean internal wave and current and the single action of ocean current is studied. (2) according to the dynamic response characteristics of the proposed project of the suspended tunnel under the combined action. Combined with the inherent characteristics of tunnel structure and combined load, the effective vibration reduction measures are put forward. Firstly, the beam model of tunnel tube body is established, and the tunnel is simulated as a superimposed beam of simple beam and rigid beam. That is, the mode shape is approximately a superposition of a bending sinusoidal mode and a rigid body mode. Then the vibration reduction relationship between the tunnel structure and the combined load is established to reduce the vibration amplitude of the tunnel by controlling the free vibration rather than the forced vibration of the suspended tunnel caused by the combined load. Finally, through the analysis of the vibration absorption response of the proposed project of suspension tunnel, the effectiveness of the vibration reduction measures is verified and evaluated, and the reference suggestions for the structure design of the suspension tunnel are put forward.
【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】：2015
【分類號(hào)】：U451

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

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本文編號(hào)：1471084