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  • 原文摘要
  • 运载火箭在发射过程中会经历复杂的动力学环境,而普通的隔振器无法做到对高频冲击振动进行抑制的同时避免对低频振动的放大.利用形状记忆合金(SMA)作为驱动器,结合金属橡胶的刚度对形变量敏感的特点,设计了一种可改变自身固有频率的隔振器.在实验研究不同参数的金属橡胶隔振特性的基础之上,选用合适的金属橡胶作为可变频隔振器的隔振元件,并通过实验对比隔振器变频前后的共振频率差异.实验结果表明,所设计的可变频隔振器的固有频率从60 Hz以下提高到110 Hz以上,满足设计要求. Launching vehicles undergo complex dynamic environment,and an ordinary vibration isolator cannot afford carrying the suppression of high-frequency vibration and avoid low-frequency vibration amplification.Using shape memory alloy (SMA) as a drive and metal rubber as damping elements,a novel design of vibration isolator was proposed.After experimental study on different parameters of the metal rubber,suitable metal rubbers were selected as the frequency tunable vibration isolator components.The experimental result shows that natural frequency of the frequency tunable vibration isolator can change from 60 Hz to 110 Hz,which meets the design requirements.
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