阻尼复合材料在舰船筏架中的应用研究

Research on the applications of damping composite materials for shiping raft frame

本文首先采用数值仿真方法研究了复合材料筏架材料模量、材料阻尼、筏架各面板厚度等对筏架减隔振性能的影响,研究表明:筏架材料模量和阻尼提高有利于提高减隔振效果,上面板厚度增大对筏架高频隔振具有较明显的效果,而肋板厚度增大对中低频段隔振具有明显的效果,改变下面板厚度对筏架隔振效果相对较小。然后基于该仿真分析结论,进行某型复合材料筏架结构设计及成型,并通过振动试验验证了结论的正确性。

A numerical simulation method were employed to investigate the effects of the elastic moduli, material damping parameters and thickness for every panel of the composite raft frame on the vibration isolation. The results indicate that increasing the modulus and damping parameters of the composite favors vibration reduction performance, increasing the upper panel thickness favors high frequency vibration reduction performance of composite foundation, and increasing ribbed panel thickness favors high frequency vibration reduction performance of composite foundation. Vibration reduction effect is relatively small by changing lower panel thickness. According to the simulation results, one kind of structure type of composite foundation was designed and fabricated. At last, the correctness of simulation results was verified by the vibration test.