船舶结构复合阻尼材料减振性能实验研究

研制了一种自粘性复合阻尼减振胶板,在-30~60℃宽温域内,材料的平均损耗因子达到0.35。采用单点激励振动模态实验方法,研究了复合阻尼材料对船舶模型振动模态阻尼比的影响。采用动力设备运行模拟激励实验,研究了复合阻尼材料对船舶模型结构的阻尼减振效果。结果表明,粘贴复合阻尼材料后,船舶模型在500Hz范围内的模态阻尼比增加了6倍,船舶底舱结构的平均减振效果达到5dB,船舶甲板结构的平均减振效果达到6~11dB。实验研究结果对于船舶薄壁结构的阻尼减振设计具有参考价值。

Experimental Research on the Damping Performance of Composite Damping Material for the Ship Structure

A kind of self-adhesive composite damping rubber sheet with material damping loss factor 0.35 in wide operating temperature range of -30~60 is developed. Based on the modal vibration test by single-point excitation, the effect of the composite damping material on modal damping ratio of the ship model was studied. Furthermore, the vibration reduction performance of the ship model structure with the composite damping material was researched by a power equipment operation simulation incentive experiment. The results indicated that the average modal damping ratio of ship model pasted the composite damping material increased by 6 times, thus damping effect of the bottom structure of ship model is about 5dB, and the main deck structure is about 6~11dB. The experiment results have the reference value on the vibration damping design of the ship thin-plate structures.