机械谐振式热声制冷机模态频率研究  

Mode frequencies of mechanical resonance thermoacoustic refrigerators

作　　者：张晓青[1] 柳玉林[1] 丁国忠[1] 蒋华[1] 

机构地区：[1]华中科技大学能源与动力工程学院,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2007年第9期34-37,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50576024)

摘　　要：研究了一种机械谐振式热声制冷机结构,建立了装置机械谐振系统的二维模型,从振动方程中分析获得了系统的模态频率关系,同时研究了振动质量、机械和气体弹簧、腔体尺寸以及工作压力等参数对模态频率的影响.研究结果显示系统存在两个模态频率,且频率随谐振参数的变化出现分岔.通过对谐振参数的设计和调节,装置可以获得所需的特性和谐振频率.A configuration of mechanical resonance thermoacoustic refrigerators was investigated and its two-dimensional model was built. The mode frequency relation for the resonant system is obtained analytically from the vibration equations. The effects of some parameters, such as mass, mechanical and gas spring, resonator sizes as well as working pressure, on the mode frequencies of system are also investigated. The studied results have demonstrated that there exist two mode frequencies in system, and the frequency bifurcation as the resonant parameters change. The apparatus would have the characteristic and resonant frequency required by design and regulation of resonant parameters .

关 键 词：热声制冷机 机械谐振 模态频率 谐振参数 

分 类 号：TB618[一般工业技术—制冷工程] TB511[理学—物理]