Research Of Phononic Crystals On Vibration Isolation System Of Sensor

With the rapid development of industrial technology, the sensor has been widely used in various fields such as aerospace, shipping and so on. In the choice of materials and structures in the design of sensor, we have to consider the impact of overload and random vibration of the two main factors of equipment failure caused by sensor. Therefore, it is very important to design a sensor system based on the material of the phononic crystal, which has an important role in prolonging the service life of the sensor. In this paper, phononic crystal produced sensing isolation system and to the research object. Conduct the specific numerical analysis, the main work includes the following two aspects:1.Taking the materials of the phononic crystal as the research object. Firstly, the basic concept of the phononic crystal is introduced. The common types of the phononic crystal, classification methods and properties are introduced. The use of elastic waves in certain frequency range will be inhibited this characteristic. The principle of vibration isolation buffer for vibration isolation system is studied, and the selection of the material is also studied. The principle of damaged aircraft circuit system is analyzed, anti-vibration and impact-resistance of structure was designed. Application of encapsulating material and the compound vibration isolator composed of acrylonitrile-butadiene rubber and alloy steel improve the impact resistance capacity.2.The establishment of isolation system sensor model based on phononic crystal, Using the transfer-matrix method to research the vibration band gap of one dimensional mirror image triply-periodical phononic crystal heterogeneous, The expression of the dispersion relation of the wave vector and frequency is obtained by theoretical analysis. According to the material properties and structural characteristics of the vibration isolator designed in this paper. The band gap frequency range of phononic crystal isolation material is 19.8-2355 Hz, 2979-11775 Hz, 12525-23550 Hz simulated by Matlab, the impact of the frequency range is20Hz-2kHz,and in the range of band gap frequency. Modality and transient impact analysis of missile guidance system were processed to applying Ansys software, verified the impact resistance of the phononic crystal, and obtained the maximum stress is 0.035 MPa and maximum displacement is 0.12×10-4mm. The simulation results show the reliability of the phononic crystal on vibration isolation system of sensor in terms of impact.