海底管道失稳过程的模型试验研究  

Experimental research on the instability process of submarine pipelines

作　　者：高福平[1] 顾小芸[1] 浦群[1] 

机构地区：[1]中国科学院力学研究所,北京100080

出　　处：《岩土工程学报》2000年第3期304-308,共5页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金资助项目! (No.19772 0 57);中科院"九.五"重大项目 !(No.KZ951-A1- 4 0 5 - 0 1)

摘　　要：直接铺设于砂质海床上的管道的失稳是一“流—管—土”耦合问题。本文利用U形水槽产生的振荡流对管道的失稳过程进行了模拟 ,通过改变管道水下重量、管径和加载历史研究管道失稳的条件。在试验结果的基础上 ,初步得到了管道失稳的临界Fr数与管重无量纲参数之间的关系曲线 。The instability of pipelines directly installed on the seabed is a “fluid-pipe-soil”coupling problem .In this paper , the instability process of pipelines has been investigated for different submerged weight of pipeline , pipeline diameter and loading history . Based on the presently available test data , a design equation is established , relating the critical Fr number inducing pipeline instability to dimensionless pipeline weight parameter .It is also found that different loading history affects pipeline stability with different degree.

关 键 词：海底管道 管道失稳 振荡流 砂质海床 水槽 

分 类 号：TV139.2[水利工程—水力学及河流动力学] TV131.61