功能梯度复合材料充液弯管/直管的振动特性分析  

Analysis of vibration characteristics of fluid-filled curved/straight pipes made of functionally graded composite material

作　　者：陈剑 李毅 CHEN Jian;LI Yi(Naval Equipment Pricing Audit Center under Equipment Department of PLA Navy,Beijing 100161,China)

机构地区：[1]海军装备部装备审价中心,北京100161

出　　处：《舰船科学技术》2023年第18期66-72,共7页Ship Science and Technology

摘　　要：船舶海洋工程中常用的金属管道易腐蚀,维护成本高,声学阻尼性能差。功能梯度材料(FGM)是一种具有极强可设计性的新型复合材料,其材料属性随着空间位置的连续变化而变化。本文研究材料属性沿壁厚方向呈连续梯度变化的充液管道振动特性,以此分析功能梯度材料的应用前景。首先,沿壁厚方向将非均匀材料离散为若干层均匀材料,其次,基于管道的Timoshenko梁模型和流体方程建立功能梯度充液弯管或直管的耦合振动方程,最后研究高精度、高效率的动刚度法在组装充液管道单元上的应用,并讨论梯度指数对管道动态特性的影响。Metal pipes,which are extensively used in marine engineering,have weak corrosion resistance,high costs for maintenance and poor damping capacity.As a new type of composite material,functionally graded material(FGM)has continuously changing material properties along with the spatial position,which makes it possible for designable features.This paper aims to investigate the vibration characteristics of fluid-filled pipes with gradient variable parameters along the thickness in order to specify the application prospect of FGM.Firstly,multi-layered homogeneous model within the wall thickness was employed to discretize the inhomogenous material.Secondly,the Timoshenko beam model for pipes and fluid equations were combined to form the coupled governing equations for FGM fluid-filled curved or straight pipes.Finally,the dynamic stiffness method with high precision and efficiency was developed to construct the fluid-filled pipe elements.Mean-while,the effects of gradient index of FGM on the dynamic characteristics of pipes were under discussion.

关 键 词：功能梯度材料 充液管道 振动 

分 类 号：TB533[理学—物理]