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《Physics and Engineering》 2018-05
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INFLUENCE FACTORS TO FREQUENCY OF BALLOONWHISTLE BASED ON MEMBRANE REEDS

FENG Jianrui;CHEN Cong;WU Xiuwen;DONG Aiguo;China University of Geosciences;  
The factors to influence the frequency of the balloon whistle were studied theoretically and experimentally.The additional mass was considered in the dynamic vibration equation,and the film vibration model was presented.The influences of the film density,the length and radius of the tube,the radius of the container,and the inlet air mass spend to the frequency of the balloon whistle were studied based on the film vibration model.The air column vibration model was derived from the wave equation of sound propagation in the tube.The experimental results showed that the main influence factors to the base frequency are the film and tube parameters.The base frequency increased with the film tension increasing,but decreased with the film radius and surface density increasing.The base frequency increased with the inlet air mass speed increasing,but decreased with the tube length and radius increasing.The similar studies were less reported worldwide till now.
【Fund】: 中国地质大学(北京)教学研究与教学改革项目(编号:JGYB201528);; 中国地质大学(北京)2017年大学生创新创业训练计划项目(2017B71);; 北京高等学校教育教学改革立项项目(编号:2014-ms132)
【CateGory Index】: TH138
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