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利用传输矩阵法研究了镜像异质三周期一维声子晶体的振动带隙的特性,通过理论分析得出波矢与频率的色散关系表达式,根据本文设计的隔振器的材料属性与结构特征,Matlab仿真得出声子晶体隔振材料的禁带频率范围为19.8—2355Hz、2979—11775Hz、12525—23550Hz,冲击的频率范围是20Hz—2kHz,在禁带频率范围内.利用ANSYS软件对弹载传感系统进行瞬态冲击分析,验证声子晶体的抗冲击效果,获得系统的最大应力为0.035MPa,最大位移为0.12×10~(-4)mm.仿真结果验证了声子晶体型传感隔振系统在冲击方面的可靠性.
The transmission matrix method is used to study the characteristic of vibrational bandgap of one-dimensional heterostructural one-dimensional phononic crystals with mirror-image. The dispersion relation between wave vector and frequency is obtained through theoretical analysis. According to the material properties and structure of the vibration isolator Characteristics, Matlab simulation phononic crystal material obtained forbidden band frequency range 19.8-2355Hz, 2979-11775Hz, 12525-23550Hz, the impact of the frequency range is 20Hz-2kHz, in the band gap frequency range. Using ANSYS software on the The transient impact analysis of the missile-borne sensor system verifies the impact resistance of the phononic crystals, and the maximum stress of the system is 0.035MPa and the maximum displacement is 0.12 × 10 ~ (-4) mm. The simulation results show that the phononic crystal Sensing vibration isolation system in the reliability.