摘要随着工业的繁荣，人们对船舶器械的要求越来越高，各类标准层出不穷。振动的强度就是其中一个非常重要指标。而且就船舶而言,不仅要求具有安全性,还要求具有良好的舒适性。近年来,船舶研究机构对船舶振动问题越来越重视,船舶振动的传递既会使脆弱链接处产生疲劳破坏,更会导致各类精密设备、仪器等的失效异常,船舶振动还会进一步产生强烈噪声,无论对船员的生理还是心理都会产生危害，令船员更易疲劳、受伤，甚至出现失误，造成各种事故。船舶辅机种类多，振动源情况复杂，如何在不影响辅机性能的前提下最大程度的减轻振动一直是国际热门课题；且存在技术上的难题。因此对机舱辅机隔振设计及振动特性计算有重要的意义。84221

本文以某船舶综合机舱中柴油发电机组为研究对象。根据隔振设计的原则，确定了筏体的质量、形状、布置位置、弹簧刚度等。通过有限元软件Patran对辅机组及下方的双层隔振装置进行了建模，并利用Nastran软件进行模态分析及谐响应分析，校核隔振系统的效果。最后通过改变隔振系统的参数分析其对系统隔振效果的影响，其中包括隔振器布置、中间筏体质量、隔振器刚度等。

毕业论文关键词：双层隔振，有限元，模态分析，谐响应分析

Abstract With the prosperity of industry, people increasingly high demand for ship equipment, various types of emerging standards。 Wherein the intensity of vibration is a very important indicator。 And a ship, requires not only security, but also requires a good comfort。 In recent years, marine research institutes ship vibration problem more and more attention, both will pass the ship vibration fatigue failure at the fragile link, it will lead to failure of various types of precision equipment, instruments and other abnormalities, the ship will further generate strong vibrations noise, regardless of the crew physiological or psychological harm will make more crew fatigue, injury, and even errors that cause accidents。 Many kinds of auxiliary ships, the situation is complex vibration source, without affecting how the auxiliary under the premise maximize performance vibration reduction has been a hot topic internationally; and technical problems exist。 So the auxiliary engine room design and vibration isolation characteristic calculation has important significance。

Taking a comprehensive cabin ship diesel generator sets for the study。 According to the principle of vibration isolation design, determine the mass, shape, layout position, the spring stiffness of the raft and the like。 By finite element software Patran for double vibration isolation auxiliary group and below modeled, and the use of Nastran software for modal analysis and harmonic response analysis, the effect of vibration isolation system check。 Finally, analysis of their impact on the system by changing the isolation effect of vibration isolation system parameters, including vibration isolation disposed intermediate raft body mass, stiffness isolation。

Key words: double isolation; finite element；modal analysis；harmonic analysis。

目录

第一章   绪论 1

1。1 选题的背景和意义 1

1。2 辅机隔振的重要性和意义 2

1。3 隔振技术 3

1。4  本文主要研究内容 4

第二章  综合机舱辅机的隔振设计 6

2。1  综合机舱辅机隔振设计理论基础 6

2。1。1  隔振的基本原理 6

2。1。2  隔振性能测试原理