【作者】 钟如军；

【导师】 柳贡民；

【作者基本信息】 哈尔滨工程大学 ， 轮机工程， 2007， 硕士

【摘要】 管路系统中振动和噪声的产生与传播一直以来都是人们关注与研究的热点问题。本文以船舶冷却水管路为研究对象，试图从能量角度，采用统计能量分析方法对这一问题进行研究和探讨。文中首先阐述了管路系统中主要激励源的产生及其传播，介绍了统计能量分析的基本原理，以及一些重要参数的计算。论文以有限元计算结果为参考，分别讨论了管壳以及充液管壳的统计能量分析结果，论证了统计能量分析方法应用于水管路振动噪声分析的可行性。统计能量分析的功能有功率流传递路径分析和灵敏度分析，即在分析过程中改变振动噪声能量传递途径中的各项参数，预估其对目标子系统响应的影响大小，进而优化系统设计。因此，本文以管口声辐射为目标参数，分析了管径、壁厚、连接方式以及材质等因素对系统中振动噪声能量传递的影响，并通过实验分析研究了统计能量分析结果的可信程度。本文研究结果表明统计能量分析能够快速评估振动噪声能量的传递特性，可以为水管路系统的初步设计提供有价值的参考。本文得到的一些研究结论对船舶冷却水系统设计及其流体噪声控制有一定的参考作用。更多还原

【Abstract】 The generation and transmission of vibration and noise in pipeline filled with water is the pop trouble which many people want to study all the time. In this paper, the noise and vibration characteristics of cooling seawater pipeline system are researched by statistical energy analysis from the aspect of energy.Firstly, the excitation and transmission of main sources in pipeline system are described. The basis principle of statistical energy analysis and the calculation of some important parameters are introduced too. Referred to finite element, the results of dry pipe and fluid-filled pipe are discussed. It demonstrates that whether the statistic energy analysis is suitable for the vibration and noise of seawater pipeline system.Analysis of power flow transmission path and delicacy analysis are functions of statistic energy analysis; they are changing parameters of energy transmission path, and forecasting the effects on target system, so as to optimize the system, In this paper, the influences which pipe diameter, pipe thickness and joins fashion has on vibration and noise energy transmission in the system were analyzed, with the noise radiation from the outlet of pipeline system. Besides that, the result of statistic energy analysis can be validated by some of experiments.From the results, it is clear that the transmission characteristics of vibration and noise can be evaluated by statistic energy analysis quickly. So, it can provide the useful reference for first step design of seawater pipeline system. Some results of this paper are valuable for seawater pipeline design and fluid noise control.更多还原