计算力学学报2017，Vol.34Issue(6)：704-711,8.DOI:10.7511/jslx201706005
考虑海底接触的钢悬链式立管触地点动力响应以及疲劳损伤分析
Dynamic response and fatigue damage analysis of a steel catenary riser at the touchdown point considering seabed contact
摘要
Abstract
Based on the structural characteristics of touchdown points of steel catenary risers,a linear truncation model considering pipe-soil separation and a cap model containing soil suction effect are used to describe P-y curves.The dynamic response and fatigue damage characteristics at the touch down point of the riser were analyzed by changing the floating body heaving motion amplitude,the soil suction factor and the seabed stiffness.The results indicated that the vertical displacement,bending moment,equivalent stress and the fatigue damage at the touchdown point increased with the increase of floating body heaving motion amplitude.With the increase of the soil suction factor,the vertical displacement response of the steel catenary riser at touchdown points changed from the high-amplitude low-frequency response to lowamplitude high-frequency response.With the increase of the seabed stiffness,the fatigue damage of the steel catenary riser at touchdown points showed stable characteristics at first and then increased and finally became stable again.关键词
钢悬链式立管/海底接触/触地点/动力响应/疲劳损伤Key words
steel catenary riser/seabed contact/touchdown point/dynamic response/fatigue damage分类
数理科学引用本文复制引用
高云,王小梅,熊友明,邹丽,宗智..考虑海底接触的钢悬链式立管触地点动力响应以及疲劳损伤分析[J].计算力学学报,2017,34(6):704-711,8.基金项目
国家自然科学基金(51609206,51522902,51379033) （51609206,51522902,51379033）
国家留学基金(201608515007)资助项目. （201608515007）
