本文關鍵詞： 被動約束層阻尼 復合材料軸 轉子系統(tǒng) 阻尼自由振動　出處：《振動與沖擊》2017年07期 　論文類型：期刊論文

【摘要】：復合材料驅動軸在高速旋轉下的振動抑制,是先進直升機和汽車傳動系統(tǒng)結構設計需要考慮的重要問題。約束層阻尼技術是工程領域內普遍采用的實用有效的阻尼減振設計方法;然而通過采用約束層阻尼處置方式增加復合材料傳動軸的阻尼能力的研究報道,目前國內外很少見到。從應力-應變關系、應變-位移關系出發(fā),推導出復合材料Timoshenko軸、約束層與黏彈性層的動能及勢能的數學表達式,采用Hamilton原理建立具有約束層阻尼的旋轉復合材料軸的運動學方程。采用廣義Galerkin法對動力學方程進行了離散化,建立了廣義坐標表示的自由振動方程組,通過特征值求解得到系統(tǒng)的固有頻率和阻尼比;基于比例阻尼假設和四階Runge-Kutta數值積分方法求解上述方程,得到系統(tǒng)的自由振動響應曲線。通過數值分析揭示了約束層材料、黏彈性層材料、鋪層方式、長徑比和轉速對具有約束層阻尼的旋轉復合材料軸的固有振動特性以及自由振動響應特性的影響。
[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】： 山東科技大學機械電子工程學院;
【基金】：國家自然科學基金(11272190)
【分類號】：TB33
【正文快照】： 驅動軸是用于直升機和汽車動力傳輸系統(tǒng)中的一類重要的結構部件。與金屬材料軸相比,復合材料由于具有重量輕、比強度和比剛度高等優(yōu)點,因此,正在逐步取代金屬材料,在現代航空和汽車驅動軸結構設計中獲得越來越廣泛的應用[1-5]。高性能飛機和汽車的研制對復合材料驅動軸在高速，

本文編號：1445455