考虑管土作用海底管线涡激振动分析  

Analysis of VIV for Free Spanning Pipelines Considering Pipe-soil Interaction

作　　者：何旭[1] 王永学[1] 李小超[1] 

机构地区：[1]大连理工大学,大连116023

出　　处：《中国海洋平台》2011年第6期21-26,共6页China offshore Platform

基　　金：国家自然科学基金重点项目(50439010);教育部重大项目(305003)

摘　　要：将VIVANA模型与梁单元结合建立海底管线悬跨段涡激振动(VIV)数值模型,利用弹簧模拟管土作用,采用频域和时域非线性相结合的方法对涡激振动问题进行求解,计算在土壤非线性边界务件下的海底管线悬跨段涡激振动响应。采用三种不同的弹簧进行计算,弹簧具有不同的P-δ曲线。本文对求解方法的有效性进行考察,研究了土壤非线性对涡激振动的影响。Combining the VIVANA model with a flexible beam model, a numerical model is developed for VIV of free spanning pipelines. The pipe-soil interaction is modeled by intro- ducing non-linear springs. Based on the combination of linear frequency domain and non-linear time domain models, the response of the pipeline span is calculated. Calculations are carried out using three different springs with different P - δ curves. The validity of the method is checked and the effect of soil non-linear on the VIV is investigated.

关 键 词：管土作用 海底管线悬跨 涡激振动 弹簧 

分 类 号：P751[交通运输工程—港口、海岸及近海工程]