阮、月琴共鸣面板的振动特性  

Vibration Modal Analysis of Resonance Board of Ruan and Yukin

作　　者：刘镇波[1] 李司单[1] 刘一星[1] 黄英来[1] 

机构地区：[1]生物质材料科学与技术教育部重点实验室(东北林业大学),哈尔滨150040

出　　处：《东北林业大学学报》2011年第12期74-76,共3页Journal of Northeast Forestry University

基　　金：国家自然科学基金项目(30471356);黑龙江省自然科学青年基金项目(QC2009C105)

摘　　要：采用快速傅立叶变换频谱分析仪测定了阮、月琴共鸣面板在0～1 000 Hz频率范围内的各阶振动频率、声振动传播速度及声辐射强度,并分析了各阶振动频率对应的振动模态。对于阮,较易测得50、135、236.25、307.5、345、435、642.5、737.5 Hz等阶共振频率;对于月琴,较易测得56.25、111.25、170、322.5、371.25、438.75、570、707.5、880 Hz等阶共振频率。除了共振频率在170 Hz左右对应的振型,阮与月琴各阶振型基本相同,但对应的共振频率却存在差异。共鸣面板的顺纹理声振动传播速度最大,其值为横纹理方向的2倍以上。The resonant frequencies in 0-1 000 Hz of Ruan and Yukin＇ s top resonant boards were measured by FFT analyzer, and the vibration modes were also analyzed. The resonant frequencies could be easily identified in 50, 135,236.25,307.5, 345,435, 642.5 and 737.5 Hz for Ruan, and 56.25, 111.25, 170,322.5,371.25,438.75,570,707.5 and 880 Hz for Yukin. Except for 170 Hz, the vibration modes of Ruan and Yukin were similar in other orders, but the corresponding resonant frequencies were different. The sound velocity in longitudinal direction was the largest, which was more than one time faster than that in radius direction. The trend of spectrum intensity of resonance frequency could be expressed with a parabola, and the largest intensity was obtained in 300-1 200 Hz.

关 键 词：阮 月琴 共鸣面板 振动特性 

分 类 号：S784[农业科学—林学] TS953[轻工技术与工程]