叠层平面圆环的振动行为

Vibrational Behavior of Laminated Annular Plates

为了研究叠层平面圆环的振动行为和叠层对其振动影响,用有限元法对系列均质平面圆环进行振动分析以获得试验比较参照,对系列均质圆环和不同夹紧压力下的系列叠层圆环进行大量试验。理论分析和试验结果表明,叠层平面圆环的振动行为是由组成该叠层圆环的单片圆环的振动行为所支配,但叠层对圆环的振动有着重要影响,且这种影响与模态类型、夹紧压力和叠层层数有很大关系。随着叠层层数和夹紧力的增加,圆环纵向振动模态将很快消失,而平面模态得以保留并支配叠层平面圆环的振动。

In order to study the vibrational behavior of laminated annular plates, and effects of laminations on the vibrations of the plates, the vibrations of a series of solid annular plates are calculated by using the finite element method to obtain reference for comparison with experimental data. An extensive range of experiments is performed on both a series of solid plates and a series of laminated plates under a range of normal clamping pressures. Based on the calculated and experimental results, it is found that vibrational behavior of the laminated plates is dominated by that of the individual plate, of which the laminated plates are composed. However, laminations have great effects on the vibrational behavior of the laminated plates, and the effects depend upon the mode type, the clamping pressure and the number of plate assembly. With increasing of the numbers of laminations and increasing of the claming pressure, the longitudinal vibration modes vanish quickly, and only the in-plane modes persist and dominate the vibrations of laminated annular plates.