锥形扬声器振膜的谐波失真  

The harmonic distortion of loudspeakers caused by cone vibration

作　　者：郑保宾 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）》2015年第4期397-401,共5页Journal of Zhejiang Normal University:Natural Sciences

基　　金：国家自然科学基金资助项目(11174255)

摘　　要：用扬声器振膜在某个驱动频率下的线性振型对连续体进行了离散,得到了1个自由度的非线性振动方程,给出了由积分表示的方程中系数的计算表达式.通过求解非线性方程得到了谐波失真与非线性系数的关系.然后通过数值计算探讨了锥体的几何参数对非线性系数的影响.计算结果表明:选择合适的几何参数,可以使谐波失真得到一定程度的减小.The nonlinear vibration equation for loudspeaker shell was obtained by using its linear displacement patterns.The coefficients of the nonlinear equation were given in integral form.The relation between the har-monic distortion and nonlinear coefficients was presented.The effects of the geometrical parameters on harmon-ic distortion were discussed.The results showed that nonlinear harmonic distortion could be decreased by choosing proper loudspeaker diaphragm geometry.

关 键 词：锥形扬声器 谐波失真 非线性系数 数值计算 

分 类 号：O326[理学—一般力学与力学基础]