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.
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)
关键词
管土作用
海底管线悬跨
涡激振动
弹簧
pipe-soil interaction
free spanning pipelines
VIV
spring
