摘要
该文根据电磁喇叭结构特征建立了其工作过程中时变电磁力激励条件下动铁心与膜片构成的分段线性振子动力学模型,应用数值积分方法分析了电磁喇叭振动响应特性。进而根据所得到的稳态振动幅值与频率结果仿真分析了电磁喇叭的声学特性,研究了触头初始压力及间隙参数对振动幅值、频率、声压级的影响规律,所得的结论可直接用于以电磁喇叭为代表的电声器件优化设计。
The piecewise linear vibration model of an electromagnetic horn including a movable iron core and a diaphragm with time-varring electromagnetic force excitation was built.Then,the vibration responses of the horn were obtained by using numerical integral method.According to the calculated steady vibration displacement amplitude and frequency,the acoustic characteristics of the electromagnetic horn were analyzed with the simulation software.Finally,the effects fo initial pressure of contact points and gap parameters on the vibration displacement amplitude,frequencies and sound pressure level were also investigated comprehensively.The conclusions drawn were valuable for optimal design of electroacoustic devices,such as,electromagnetic horns.
出处
《振动与冲击》
EI
CSCD
北大核心
2011年第10期224-227,共4页
Journal of Vibration and Shock
关键词
电磁喇叭
振动
分段线性
声压
优化
electromagnetic horn
vibration
piecewise linearity
sound pressure
optimization
