阻尼对浮筏隔振性能的影响研究

以船用浮筏为研究对象,根据浮筏有限元分析时阻尼矩阵的形成机理,计算分析不同阻尼对浮筏隔振性能的影响。结果表明,隔振器阻尼在低频段能提高浮筏的隔振效果,在中高频段则对隔振效果起负面作用;材料阻尼在低频段起负面作用;瑞利阻尼和恒定阻尼比能改善隔振效果,并且在中高频段影响更为显著,此外,恒定阻尼比能够抑制振级峰值,使振级曲线更为光顺。

Research on Effects of Damping on Floating Raft Isolation Performance

Taking floating raft in ship as the object,the effects of different damping on the floating raft performance were analyzed numerically.It was concluded that the vibration isolator damping can improve the isolation performance in low frequency,but it has negative effect in high frequency.The material damping will do harm to isolation effect in low frequency.Rayleigh damping and constant damping ratio can increase the isolation performance and the influence is distinct in middle or high frequency.Besides,the ...