本文選題：負(fù)剛度 + 被動(dòng)隔振　； 參考：《蘇州科技大學(xué)》2017年碩士論文

【摘要】：通過對(duì)正負(fù)剛度并聯(lián)隔振器隔振機(jī)理分析,設(shè)計(jì)了一種基于負(fù)剛度理論的被動(dòng)減振裝置。通過設(shè)計(jì)參數(shù)優(yōu)化,建立了系統(tǒng)的剛度函數(shù)表達(dá)式及平衡位置處的零剛度條件,進(jìn)而細(xì)化設(shè)計(jì)出隔振裝置。為驗(yàn)證該設(shè)施的隔振效果,將其應(yīng)用在框架模型和橋梁模型的抗震中,證明了該設(shè)備能夠通過純粹的機(jī)械機(jī)制產(chǎn)生負(fù)剛度,達(dá)到結(jié)構(gòu)減震效果。文中所設(shè)計(jì)負(fù)剛度裝置(NSD)是通過一個(gè)大的彈簧,使結(jié)構(gòu)遠(yuǎn)離中心位置,從而產(chǎn)生負(fù)剛度的力學(xué)行為。利用數(shù)值計(jì)算方法分析負(fù)剛度結(jié)構(gòu)系統(tǒng)的內(nèi)部特性,研究了影響負(fù)剛度隔振設(shè)備設(shè)計(jì)影響因數(shù),并且通過蒙特卡羅響應(yīng)面結(jié)合全概率方法分析其敏感性。最后通過實(shí)驗(yàn)驗(yàn)證了本文設(shè)計(jì)的隔振器降頻和隔振的效果和抗沖擊性能。本文主要研究工作分為以下幾個(gè)方面:論文首先闡述了研究背景和意義,簡(jiǎn)單介紹了結(jié)構(gòu)振動(dòng)控制的概念、分類�？偨Y(jié)了國(guó)內(nèi)外現(xiàn)有振動(dòng)控制的研究狀況和理論背景。最后介紹了負(fù)剛度隔振器的研究背景及意義,進(jìn)而引出本課題的研究動(dòng)機(jī)。其次通過對(duì)負(fù)剛度隔振器各參數(shù)之間的優(yōu)化尋找他們之間的關(guān)系,并采用數(shù)值計(jì)算驗(yàn)證了文中所設(shè)計(jì)負(fù)剛度隔振器具有降頻和隔振的效果。接著采用蒙特卡羅響應(yīng)面結(jié)合全概率方法分析了影響負(fù)剛度隔振設(shè)備影響因數(shù)的靈敏度。并通過實(shí)驗(yàn)驗(yàn)證了隔振器降頻和隔振的效果。最后總結(jié)了課題的研究結(jié)論,并對(duì)進(jìn)一步研究給出一些建議。
[Abstract]:Based on the analysis of the vibration isolation mechanism of the parallel vibration isolator with positive and negative stiffness, a passive vibration absorber based on the theory of negative stiffness is designed. By optimizing the design parameters, the expression of the stiffness function and the zero stiffness condition at the equilibrium position are established, and then the vibration isolation device is designed. In order to verify the vibration isolation effect of the equipment, it is applied to the seismic resistance of the frame model and the bridge model. It is proved that the equipment can produce negative stiffness through pure mechanical mechanism and achieve the effect of structural vibration absorption. The negative stiffness device (NSD) is designed to make the structure far away from the center of the structure through a large spring, which results in the mechanical behavior of negative stiffness. The internal characteristics of the negative stiffness structural system are analyzed by numerical method. The influence factor of the design of the negative stiffness vibration isolator is studied. The sensitivity of the system is analyzed by the Monte Carlo response surface combined with the full probability method. Finally, the effect and impact resistance of the vibration isolator designed in this paper are verified by experiments. The main research work of this paper is as follows: firstly, the background and significance of the research are described, and the concept and classification of structural vibration control are briefly introduced. The research status and theoretical background of vibration control at home and abroad are summarized. Finally, the research background and significance of negative stiffness isolator are introduced. Secondly, by optimizing the parameters of the negative stiffness isolator, the relationship between them is found, and the numerical calculation is used to verify that the negative stiffness isolator designed in this paper has the effect of reducing frequency and isolating vibration. Then the sensitivity of the influence factor of the negative stiffness isolation equipment is analyzed by using the Monte Carlo response surface and the full probability method. The effect of frequency reduction and vibration isolation is verified by experiments. Finally, the conclusion of the research is summarized, and some suggestions for further research are given.
【學(xué)位授予單位】：蘇州科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU352.1

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