| Citation: | ZHANG Bocheng, ZHANG Jian, ZHANG Zefeng, et al. Damping anti-vibration design and optimization method of composite skin with hard coating[J]. Journal of Beijing University of Aeronautics and Astronautics, 2020, 46(8): 1469-1475. doi: 10.13700/j.bh.1001-5965.2019.0512(in Chinese)
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To solve the local vibration problem of thin composite skin in civil aircraft, damping anti-vibration design method with hard coating is proposed, and multi-parameter optimization method was carried out in consideration of the effects of structural parameters of coating on the mass and natural characteristics. Based on the finite element method and classical laminated plate theory, dynamic equation of compound structure of composite skin with hard coating was established. Feasible direction method was put forward to obtain the optimal combination of hard coating material performance parameters and thickness parameters to achieve the maximum reduction of resonance peak value, with constraint conditions of given mass increase and natural frequency change range. The optimization example shows that by reasonably designing the parameter combination of elastic modulus and loss factor of hard coating, a higher resonance peak value attenuation can be obtained with a thinner coating, and the optimal anti-vibration performance can be obtained when mass increase and natural frequency change of skin caused by hard coating are controlled in the design range.
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