本文關(guān)鍵詞： 被動(dòng)約束層阻尼 復(fù)合材料軸 轉(zhuǎn)子系統(tǒng) 阻尼自由振動(dòng)　出處：《振動(dòng)與沖擊》2017年07期 　論文類型：期刊論文

【摘要】：復(fù)合材料驅(qū)動(dòng)軸在高速旋轉(zhuǎn)下的振動(dòng)抑制,是先進(jìn)直升機(jī)和汽車傳動(dòng)系統(tǒng)結(jié)構(gòu)設(shè)計(jì)需要考慮的重要問(wèn)題。約束層阻尼技術(shù)是工程領(lǐng)域內(nèi)普遍采用的實(shí)用有效的阻尼減振設(shè)計(jì)方法;然而通過(guò)采用約束層阻尼處置方式增加復(fù)合材料傳動(dòng)軸的阻尼能力的研究報(bào)道,目前國(guó)內(nèi)外很少見(jiàn)到。從應(yīng)力-應(yīng)變關(guān)系、應(yīng)變-位移關(guān)系出發(fā),推導(dǎo)出復(fù)合材料Timoshenko軸、約束層與黏彈性層的動(dòng)能及勢(shì)能的數(shù)學(xué)表達(dá)式,采用Hamilton原理建立具有約束層阻尼的旋轉(zhuǎn)復(fù)合材料軸的運(yùn)動(dòng)學(xué)方程。采用廣義Galerkin法對(duì)動(dòng)力學(xué)方程進(jìn)行了離散化,建立了廣義坐標(biāo)表示的自由振動(dòng)方程組,通過(guò)特征值求解得到系統(tǒng)的固有頻率和阻尼比;基于比例阻尼假設(shè)和四階Runge-Kutta數(shù)值積分方法求解上述方程,得到系統(tǒng)的自由振動(dòng)響應(yīng)曲線。通過(guò)數(shù)值分析揭示了約束層材料、黏彈性層材料、鋪層方式、長(zhǎng)徑比和轉(zhuǎn)速對(duì)具有約束層阻尼的旋轉(zhuǎn)復(fù)合材料軸的固有振動(dòng)特性以及自由振動(dòng)響應(yīng)特性的影響。
[Abstract]:Vibration suppression of composite drive shaft under high speed rotation. It is an important problem to be considered in the structural design of advanced helicopter and automobile transmission system. The damping technology of constrained layer is a practical and effective design method of damping vibration in engineering field. However, it is seldom seen at home and abroad to increase the damping capacity of composite transmission shaft by using the damping disposal method of constrained layer. The stress-strain relationship and strain-displacement relationship are considered. The mathematical expressions of kinetic energy and potential energy of composite Timoshenko axis, confinement layer and viscoelastic layer are derived. The kinematics equation of rotating composite axis with constrained layer damping is established by Hamilton principle, and the dynamic equation is discretized by generalized Galerkin method. The free vibration equations expressed by generalized coordinates are established and the natural frequency and damping ratio of the system are obtained by solving the eigenvalues. Based on the proportional damping assumption and the fourth-order Runge-Kutta numerical integration method, the free vibration response curve of the system is obtained, and the constrained layer material is revealed by numerical analysis. The effects of viscoelastic layer material, layering mode, aspect ratio and rotational speed on the natural vibration characteristics and free vibration response characteristics of rotating composite shaft with constrained layer damping.
【作者單位】： 山東科技大學(xué)機(jī)械電子工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(11272190)
【分類號(hào)】：TB33
【正文快照】： 驅(qū)動(dòng)軸是用于直升機(jī)和汽車動(dòng)力傳輸系統(tǒng)中的一類重要的結(jié)構(gòu)部件。與金屬材料軸相比,復(fù)合材料由于具有重量輕、比強(qiáng)度和比剛度高等優(yōu)點(diǎn),因此,正在逐步取代金屬材料,在現(xiàn)代航空和汽車驅(qū)動(dòng)軸結(jié)構(gòu)設(shè)計(jì)中獲得越來(lái)越廣泛的應(yīng)用[1-5]。高性能飛機(jī)和汽車的研制對(duì)復(fù)合材料驅(qū)動(dòng)軸在高速，

本文編號(hào)：1445455