粘弹性两跨输流管道的流固耦合动力特性分析  

Analysis of fluid-solid coupling dynamic characteristics of viscoelastic two-span pipeline

作　　者：刘颖 王威 夏艳波 周凌峰 Liu Ying;Wang Wei;Xia Yanbo;Zhou Lingfeng(Hunan Institute of Traffic Engineering,Hengyang Hunan 421001,China)

机构地区：[1]湖南交通工程学院,湖南衡阳421001

出　　处：《山西建筑》2023年第18期53-56,共4页Shanxi Architecture

基　　金：湖南省“十四五”应用特色学科:“交通运输工程”项目(湘教通[2022]351号);湖南省大学生创新创业训练计划项目:基于UHPC的河道护坡植生生态混凝土研究(编号202213924023)。

摘　　要：以Bernoulli-Euler梁模型为基础,建立了粘弹性多跨输流管道的运动微分方程。运用Laplace变换对该方程进行求解,得到了多跨输流管道固有特性的Green函数解。研究了两跨与单跨简支输流管道固有特性之间的关联,以及粘弹性系数对两跨简支输流管道固有频率的影响。结果表明:两跨管道含有单跨管道的固有特性;增加粘弹性会提高系统的颤振失稳临界流速和高阶(阶数大于跨数)的发散失稳临界流速。Based on Bernoulli-Euler beam model,the differential equation of motion of viscoelastic multi-span pipeline is established.This equation is solved by Laplace transform,and the Green function solution for inherent characteristics of multi-span pipeline is obtained.The relationship between inherent characteristics of two-span simply supported pipeline and that of single-span pipeline,and the influence of viscoelastic coefficient on the natural frequency of two-span pipeline,are studied.The results show that the inherent characteristics of the two-span pipeline contains that of single-span pipeline,the first and second order critical velocities for flutter and the higher order critical velocities for divergence increase with increasing viscoelastic coefficient.

关 键 词：多跨输流管道 GREEN函数 固有特性 粘弹性 

分 类 号：TU313[建筑科学—结构工程]