作　　者： ; ; ; ;

机构地区： 国防科学技术大学机电工程与自动化学院

出　　处： 《机械工程学报》 2005年第2期205-209,共5页

摘　　要： 无限周期弹簧振子结构具有和声子晶体类似的振动(弹性波)带隙,带隙频率范围内的振动(弹性波)在该结构 中无法进行传播。在计算无限周期弹簧振子结构振动(弹性波)带隙的基础上,采用数值方法计算并讨论了有限周 期弹簧振子结构的振动传输特性及隔振特性,最后以双质量周期弹簧振子结构为例,对其振动传输特性及隔振特 性进行了试验验证。 By analyzing the vibration band structure of infinite periodic mass-spring structure, it is discovered that the structure have vibration band gaps which are similar with elastic band structure of phononic crystals, and the vibration of such frequencies within band gaps can not be transmitted. Numerical calculation method is applied to calculate the frequency response curve of finite periodic structure. The influences of periodicity of mass-spring, material damping and the characteristics of vibration isolation are discussed by using numerical calculation method. Those conclusions come from numerical calculation are examined by vibration experiment of two mass periodic mass-spring structures, which results in reasonable agreements.

关 键 词： 声子晶体 弹性波带隙 振动带隙 隔振

领　　域： [理学] [理学] [机械工程]