环肋圆锥壳基座振动传递的粘弹性阻尼控制技术研究

Study on viscoelastic damping control technology for vibration transmission of conical shell base with frame

敷设粘弹性阻尼材料是船舶结构进行减振降噪的一种有效方式。该文利用有限元迭代法对具有频变特性的粘弹性材料的振动响应进行计算,并验证了计算方法的正确性。同时对粘弹性阻尼材料在带有环肋圆锥壳基座结构的敷设方法进行了研究。研究结果表明对基座的腹板敷设约束阻尼层结构可有效地降低整个结构的振动响应。

Viscoelastic damping material is an efficient method to reduce vibration and noise for ship struc-ture. In this paper, the vibration response of frequency dependent viscoelastic material was calculated with finite element iteration procedure. And the correctness of this method was validated. Then the laying tech-nology of viscoelastic damping material on conical shell base with frame was studied. The results show that constrained damping structure on web of base reduces the vibration response of structure efficiently.