發(fā)布時(shí)間：2018-10-26 10:30

【摘要】：調(diào)諧質(zhì)量阻尼器(Tuned Mass Damper, TMD)是時(shí)下應(yīng)用范圍最廣泛的被動(dòng)減振系統(tǒng)之一。由于調(diào)諧質(zhì)量系統(tǒng)減振效果明顯且占用空間少、便于施工安裝維護(hù)等優(yōu)勢,在高層、高聳結(jié)構(gòu)及橋梁的減振、抗風(fēng)工程中有著廣闊的發(fā)展前景。 調(diào)諧質(zhì)量阻尼器是一種附加在結(jié)構(gòu)上的減振子結(jié)構(gòu),由彈簧、阻尼器和質(zhì)量塊組成,質(zhì)塊一般通過彈簧和阻尼器支撐或者懸掛在主結(jié)構(gòu)上。當(dāng)結(jié)構(gòu)在受到外部荷載作用下產(chǎn)生振動(dòng)時(shí),子結(jié)構(gòu)通過連接裝置與結(jié)構(gòu)一起振動(dòng),由此產(chǎn)生的能量會(huì)通過慣性力反作用于主結(jié)構(gòu),以及部分被阻尼器所消耗,實(shí)現(xiàn)減振的目的。 本文采用某十二層框架結(jié)構(gòu)為背景,使用Sap2000有限元分析軟件建立結(jié)構(gòu)模型。首先通過模態(tài)分析,得出前十二階振型、振型周期、頻率等動(dòng)力特性,隨后進(jìn)行時(shí)程分析,得出主結(jié)構(gòu)在無減振裝置下,受到三組地震波激勵(lì)的響應(yīng)情況,計(jì)算出結(jié)構(gòu)各層最大位移。建立調(diào)諧質(zhì)量阻尼器的理論計(jì)算模型,分析研究子結(jié)構(gòu)的減振原理,推導(dǎo)出位移理論計(jì)算公式,對其中使主結(jié)構(gòu)位移產(chǎn)生影響的重要參數(shù)如質(zhì)量比μ、阻尼比ζd進(jìn)行分析并取值,選擇調(diào)諧質(zhì)量阻尼系統(tǒng)在軟件中合適的模擬方法進(jìn)行模擬,對不同參數(shù)如質(zhì)量比、阻尼比在合理的取值范圍中分別取值比較,最終通過較小位移比的數(shù)據(jù)證明其減振效果。 研究結(jié)果表明,選擇合理的參數(shù),尤其是阻尼比,可以有效減小水平地震作用對主結(jié)構(gòu)的位移影響。本文使用水箱作為調(diào)諧質(zhì)塊,既減少了額外添加質(zhì)塊對結(jié)構(gòu)的負(fù)荷,也可以通過調(diào)整注水量靈活調(diào)整的質(zhì)量參數(shù),以達(dá)到最佳減振效果。
[Abstract]:Tuned mass damper (Tuned Mass Damper, TMD) is one of the most widely used passive damping systems. Because the tuned mass system has the advantages of obvious damping effect and less space, it is convenient for construction, installation and maintenance, so it has a broad development prospect in the high-rise, towering structures and bridges, as well as in the wind-resistant engineering. Tuned mass damper (TMD) is a kind of vibration absorber attached to the structure, which consists of spring, damper and mass block. The mass block is generally supported by spring and damper or suspended on the main structure. When the structure vibrates under external load, the substructure vibrates with the structure through the connection device. The resulting energy will react to the main structure through the inertia force and partly be consumed by the damper to achieve the purpose of vibration reduction. In this paper, a 12-story frame structure is used as the background, and Sap2000 finite element analysis software is used to establish the structural model. First, the dynamic characteristics of the first twelve modes, the period and the frequency are obtained by modal analysis, and then the response of the main structure to three groups of seismic waves without vibration absorber is obtained by time history analysis. The maximum displacement of each floor of the structure is calculated. The theoretical calculation model of tuned mass damper is established, the vibration absorption principle of substructure is analyzed and the formula of displacement theory is deduced. The important parameters such as mass ratio 渭, which affect the displacement of the main structure, are derived. The damping ratio 味 d is analyzed and evaluated. The suitable simulation method of tuned mass damping system is chosen to simulate the damping system. The different parameters such as mass ratio and damping ratio are compared in a reasonable range. Finally, the effect of vibration reduction is proved by the data of small displacement ratio. The results show that choosing reasonable parameters, especially damping ratio, can effectively reduce the effect of horizontal earthquake on the displacement of the main structure. In this paper, the water tank is used as the tuned mass block, which not only reduces the load of the additional mass block to the structure, but also adjusts the quality parameters flexibly by adjusting the injection quantity, so as to achieve the best vibration absorption effect.
【學(xué)位授予單位】：內(nèi)蒙古工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TU973.31

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