基于环境激励网架结构的船舶结构模态分析

Modal analysis of ship structures based on environmentally excited grid structures

船舶结构的模态分析主要是指船体结构的振动特性分析,随着海上航运业的迅速发展,对船舶的质量有更高的要求,船舶的振动不仅会产生大量的噪声,还会导致船体连接的结构出现松动等问题,甚至导致船体的损坏。船舶的振动激励主要是指海浪、海风、船舶动力系统等激励,为了提高船舶结构的振动特性,本文研究了基于环境激励网架结构的船舶结构振动模态,分别对环境激励、船舶振动信号采集、模态参数识别等内容进行了研究,并对船舶结构的模态进行了仿真试验。本文对于改善环境激励下的船舶结构振动特性有一定的参考意义。

Modal analysis of ship structure mainly refers to the analysis of vibration characteristics of ship hull structure.With the rapid development of maritime shipping industry,there are higher requirements for the quality of ship.The vibration of ship will not only produce a lot of noise,but also lead to the loosening of the structure of ship hull connection,and even lead to the damage of ship hull.Ship vibration excitation mainly refers to wave,sea breeze and ship power system.In order to improve the vibration characteristics of ship structure,the vibration modes of ship structure based on environmental excitation grid structure are studied in this paper.The environmental excitation,vibration signal acquisition and modal parameter identification are studied respectively,and the modal of ship structure is simulated.This paper has certain reference significance for improving the vibration characteristics of ship structures under environmental excitation.