利用AUTO软件分析扬声器薄壳的分岔特性  

A study on the bifurcation of loudspeaker shell by the software AUTO

作　　者：李小菊[1] 张志良[1] 

机构地区：[1]浙江师范大学数理与信息工程学院,浙江金华321004

出　　处：《浙江师范大学学报（自然科学版）》2011年第4期409-413,共5页Journal of Zhejiang Normal University:Natural Sciences

基　　金：浙江省自然科学基金资助项目(100039)

摘　　要：采用AUTO软件分析了扬声器薄壳非线性振动方程的分岔特性及稳定性,所分析的系统为扬声器轴对称模态处于共振且轴对称模态和非轴对称模态处于2∶1内共振时的情形.得到了系统的频率响应、驱动力响应曲线及分岔集,结果与已有实验结果基本吻合.表明扬声器的分谐波源自轴对称模态和非轴对称模态的耦合作用.The bifurcation and the stability of the nonlinear vibration of loudspeaker shell were analyzed by the software AUTO,with the axisymmetric mode and an asymmetric mode of the loudspeaker shell in the internal resonances of 2 ∶1 and the axisymmetric mode driven resonantly.The bifurcation sets,frequency response and driving force response were presented.The bifurcation sets should in agreement with exist experiment results.The results indicated that the subharmonic of louderspeakers was due to the coupling between the axisymmetric and asymmetric modes.

关 键 词：扬声器 非线性振动 AUTO软件 分岔 

分 类 号：O326[理学—一般力学与力学基础]