Design of shipboard composite floor based on vibration and noise performance

  Objectives  To optimize the acoustic performance of the shipboard floor and reduce accidental vibrations and noise in the cabin, this paper presents new design schemes of shipboard composite floor and carries out relevant experimental research.

  Methods  In the experiment, the sample plates were fixed with bolts on each corner and the middle of each edge, a ball-drop impact tests were adopted to investigate the vibrations and noise generated by traditional aluminum-alloy checkered plate and two kinds of new composite plate. Balls of multiple weights were dropped from variable heights to the center of the sample plate. The vibration and noise reduction effects of the new composite plate were analyzed quantitatively.

  Results  The results show that the vibrations and air-noise results of the new composite plates are obviously lower than those of the traditional aluminum-alloy checkered plate when they are impacted by the same steel ball at the same height, both see a decrease of more than 9 dB in the different experiments, however, composite plate with steel edge banding can reduce more vibrations and air-noise rather than which with T60 damping material edge banding.

  Conclusions  The acoustic performance of new composite plates are clearly better than the traditional aluminum-alloy checkered floor, and deserve better recognition and application.