The vibration suppression of a composite shaft operating at high speeds is an important issue in structural design of advance power transmission of helicopters and automobiles.Constrained layer damping technology is an effective method in engineering field and it is widely used for reducing structural vibration.However,the studies on strengthening damping of a composite shaft by using constrained layer damping treatment are relatively few.Here,a mechanical model was developed for a rotating composite shaft with passive constrained layer damping (PCLD).Based on the constitutive relation of materials and the strain-displacement relation,the kinetic energy and strain energy of the composite shaft,constrained layer and viscoelastic layer were derived.Hamilton’s principle was used to derive the motion equations of the shaft with PCLD.The motion equations were discretized by using the general Galerkin method.The natural frequencies and modal damping ratios were obtained by computing a matrix eigenvalue problem.Using the assumption of proportional damping and Runge-Kutta integration algorithm,the time history responses of the system’s damped free vibration were gained.The effects of constrained layer material,viscoelastic layer material,stacking sequences,ratio of length to diameter and rotating speed on the natural vibration characteristics and damped free vibration responses of the composite shaft with PCLD were analyzed using numerical simulation.
时玉艳，任勇生，张玉环 . 具有约束层阻尼旋转复合材料轴的动态特性研究[J]. 振动与冲击, 2017, 36(7): 45-56.
SHI Yuyan,REN Yongsheng,ZHANG Yuhuan. Vibration characteristics of a rotating composite shaft with constrained layer damping. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(7): 45-56.
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