【摘要】：拉索的風(fēng)致振動會對大跨度斜拉橋的施工和正常運營產(chǎn)生較大危害和安全隱患,為了解決拉索這個典型的風(fēng)致振動問題,本論文對斜拉索的振動控制以及振動機理進行研究與探索。論文首先從風(fēng)致振動危害和拉索阻尼器減振效果入手,引出混雜系統(tǒng)控制理論,然后在混雜系統(tǒng)理論研究基礎(chǔ)上建立了拉索阻尼器半主動控制的混合邏輯動態(tài)模型,并對此模型進行了數(shù)值仿真分析。另外為了驗證所建立模型的實用性,在此控制系統(tǒng)基礎(chǔ)上,將混雜系統(tǒng)的MLD模型應(yīng)用到了實際工程瓊州海峽大橋幾根典型斜拉索上,進行了風(fēng)振動下拉索的參數(shù)振動分析。鑒于模型效率的重要性,本論文最后進行了拉索傳統(tǒng)空間狀態(tài)模型和半主動的混合邏輯動態(tài)模型執(zhí)行效率、編程效率和切換效率對比,并對影響模型效率的原因進行初步分析,為后續(xù)研究者改善模型效率打下一定的基礎(chǔ)。本論文較為成功將拉索半主動控制的MLD模型運用到實際工程,解決了傳統(tǒng)理論和模型統(tǒng)一數(shù)值分析體系的難題,并首次進行了模型效率的對比及其原因分析。混合邏輯動態(tài)理論和模型成功地解決了具有非線性狀態(tài)離散事件的體系以及其中復(fù)雜非線性振動控制方面的難題,土木工程領(lǐng)域引進混雜系統(tǒng)具有重要意義。
[Abstract]:The wind-induced vibration of cable will cause great harm and hidden danger to the construction and normal operation of long-span cable-stayed bridge. In order to solve the problem of wind-induced vibration of cable, In this paper, the vibration control and vibration mechanism of stay cables are studied and explored. In this paper, the hybrid system control theory is introduced from wind induced vibration hazard and cable damper damping effect, and then the hybrid logic dynamic model of semi-active control of cable damper is established on the basis of hybrid system theory research. The model is analyzed by numerical simulation. In addition, in order to verify the practicability of the established model, the MLD model of hybrid system is applied to several typical stayed cables of Qiongzhou Strait Bridge, and the parametric vibration of the cable is analyzed. In view of the importance of model efficiency, in the end of this paper, the performance efficiency, programming efficiency and switching efficiency of the traditional spatial state model and semi-active hybrid logic dynamic model are compared, and the reasons that affect the efficiency of the model are analyzed preliminarily. It lays a foundation for further researchers to improve the efficiency of the model. In this paper, the semi-active control MLD model of cable is successfully applied to practical engineering, which solves the problem of traditional theory and model unified numerical analysis system, and makes the comparison of model efficiency and its cause analysis for the first time. The hybrid logic dynamic theory and model have successfully solved the problems of nonlinear discrete event systems and the complex nonlinear vibration control. The introduction of hybrid systems in civil engineering is of great significance.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U441.3

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本文編號：2378181