Isolating low-frequency vibration from power systems on a ship using spiral phononic crystals
Isolating low-frequency vibration from power systems on a ship using spiral phononic crystals
复制标题
使用螺旋声子晶体隔离船舶电力系统的低频振动
DOI：
10.1016/j.oceaneng.2021.108804
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发表时间：
2021-03-04
影响因子：
5
通讯作者：
Li, Cheng
中科院分区：
文献类型：
--
作者：
Ruan, Yongdu;Liang, Xu;Li, Cheng
局部共振声子晶体（LRPCs）在船舶和海洋工程中用于降低低频噪声和振动的研究日益受到关注。按照ISO国际标准测量了“长井9号”的垂直速度振幅谱。针对舰船动力系统产生的低频机械振动，设计并分析了基于局域共振模式的单相螺旋形声子晶体。对不同边界条件和载荷下声子晶体板的振动特性进行了数值模拟，并进行了多组实验测试，验证了三种声子晶体的隔振能力。此外，还对安装在钢板上的隔振平台进行了数值模拟和实验研究。结果表明，螺旋声子晶体在15 ~ 45 Hz的低频范围内具有良好的适应性。LRPC具有潜在的应用，可以隔离振动，保护电子设备和精密仪器，尽管船上有复杂的振动源和边界。总之，本工作是将lrpc应用于船舶振动噪声控制领域的一次积极探索。
There is increasing concern that the locally resonant phononic crystals (LRPCs) are used to reduce low-frequency noise and vibration in ship and ocean engineering. In this work, the vertical velocity amplitude spectrums in "ChangJing 9'' are measured following the ISO international standards. According to the low-frequency mechanical vibration generated by the power systems on the ship, a single-phase spiral-shaped phononic crystal is designed and analyzed based on the locally resonant modes. The vibration characteristics of the phononic crystal plates with different boundary conditions and loads are numerically simulated, and groups of experimental tests are conducted to verify the abilities of vibration isolation for three kinds of phononic crystals. Furthermore, a vibration isolation platform installed on a steel plate is also studied by numerical simulations and experiments. The results show that the spiral phononic crystal has good adaptability for a wide range of low-frequency band, around 15-45 Hz, by altering the cylinders conveniently. The LRPC has a potential application to isolate vibration for protecting electronic devices and precision instruments despite the complex vibration sources and boundaries on the ship. In short, this work is an active exploration of putting the LRPCs into the field of ship vibration and noise control.