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鉴于传统隔振技术存在的低频隔振效率低下、控制频带窄、需外界供能等问题,深入研究了舰船振动噪声的特点和振动隔离的本质特性,提出了基于混合媒质多界面衰波隔振的舰船隔振技术思想;通过验证性实验,分析了多界面衰波隔振技术的实施效果以及液体层不同质量比例对隔振性能的影响规律。实验结果表明:通过向封闭的隔振装置填充气体、液体、多孔固体颗粒媒质形成的多界面混合媒质体系,在多孔固体颗粒填充量占液体表面积25%的条件下,液体总质量为0.5kg时,最大振级落差达14.08d B,其衰波隔振效果与最大振级落差为8.47d B的纯空气系、最大振级落差为9.61d B的空气-水二相系、最大振级落差为10.23d B的空气-油二相系相比有大幅提升;当水与油质量比为1:4时的隔振效果在整体上优于其他比例。本文的研究结果不仅为隔振的高效实施创造了有利条件,而且为隔振理论的进一步完善以及隔振装置的研制提供了必要的基础和依据。
In view of the low vibration isolation efficiency, the narrow control frequency band and the need of outside power supply, the vibration isolation and noise characteristics of the ship are thoroughly studied. The essential characteristics of the vibration isolation of the ship are put forward. Vibration of the ship vibration isolation technology; through the confirmatory experiment, the effect of the multi-interface damping wave vibration isolation technology and the effect of the different mass ratio of the liquid layer on the vibration isolation performance. The experimental results show that when the total mass of the liquid is 0.5kg by filling the closed vibration isolator with a mixture of gas, liquid and porous solid granular media, the porous media is filled with porous solid particles at a liquid surface area of 25% , The maximum vibration level drop of up to 14.08d B, the decay wave isolation effect and the maximum vibration level of 8.47d B pure air system, the maximum vibration level drop of 9.61dB air-water two-phase system, the maximum vibration level drop Compared to the air-oil two-phase system of 10.23d B; the vibration isolation effect is better than other ratios when the mass ratio of water to oil is 1: 4. The results of this paper not only create favorable conditions for the efficient implementation of vibration isolation, but also provide the necessary foundation and basis for the further improvement of vibration isolation theory and the development of vibration isolation device.