邮轮舱室结构振动预报与控制

基于有限元法（Finite Element Method，FEM），对邮轮进行振动预报。分析了邮轮的几个主要的振动源，包括主机、辅机以及螺旋桨等动力设备的振动激励特性，运用Patran软件建立邮轮振动预报有限元模型，并对邮轮进行了振动计算分析，取振动加速度值均方根结果与ISO6954- 2000E标准的限值进行比较评价。计算结果表明：除了第七甲板局部舱室以外其余各处均满足振动标准，并发现第七层甲板局部舱室在11Hz下振动严重超标，分析原因是由于螺旋桨工作引起的局部舱室共振。针对局部舱室振动过大问题，提出在振动过大区域的甲板下方焊接L型钢以降低振动量，改进后第七层甲板最大振动加速值较之前减小56.7%，满足标准要求。

Discussion about the Noise Reduction Technology of Subway Ventilation System

This article provides a lot of theoretical evidence and practical experience technology about ventilation system noise in subway construction, especially in terms of the noise reduction optimization design on grand system of emission to the ground space, as well as the reasonable noise reduction design on the air duct and air booth. All are for your reference.