顶张式立管液压气动式张紧器的数值模拟

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摘要综合考虑液压气柱的张力-冲程非线性关系以及平台-张紧器-立管之间的运动耦合关系，建立带液压气动式张紧器的顶张式立管有限元分析模型。为了更加符合工程实际，该模型中考虑了立管的真实截面布置以及采油树的作用。对四种张紧器模型，即恒定集中力模型、传统的简化模型、线性弹簧-阻尼模型以及非线性弹簧-阻尼模型进行对比分析。结果表明：恒定集中力模型不能反映立管张力的变化规律，而且立管响应也存在较大差别，故不宜采用；传统的简化模型过高评估了张紧器的张力水平，有可能导致不准确的立管响应评估结果；线性弹簧-阻尼模型可用于环境条件较温和的情况；本文建立的非线性弹簧-阻尼模型最能反映张紧器的刚度特性，且在极端载荷环境下尤为适用。

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	陈柏全1
	2
	余杨1
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	余建星1
	2
	徐立新1
	2
	吴晨1
	2
	康煜媛3

关键词 ：顶张式立管, 液压气动张紧器, 数值模拟, 非线性

Abstract：The finite element analysis model of a top tensioned riser with hydro-pneumatic tensioner was established, considering the nonlinear stiffness and the kinematic relationship in the platform-tensioner-riser system.To establish a more applicable model, the actual riser string configuration and the effect of the Christmas tree were also considered.Subsequently, four kinds of tensioner models, i.e.a constant vertical tension model, a conventional simplified model, a linear spring-damper model and the proposed nonlinear spring-damper model, were comparatively studied.The results show that the constant vertical tension model is not recommended as it cannot reflect the actual tension in the tensioner and the response of the TTR.The conventional simplified model indeed overestimates the tension of tensioner and may lead to inaccurate estimation results of the TTR responses.The linear model is applicable when the environmental condition is relatively mild.It is strongly recommended to use the nonlinear model especially in harsher environmental conditions.

Key words： top tensioned riser hydro-pneumatic tensioner numerical modeling nonlinear

收稿日期: 2018-01-02 出版日期: 2019-05-15

引用本文:

陈柏全1,2，余杨1,2，余建星1,2，徐立新1,2，吴晨1,2，康煜媛3. 顶张式立管液压气动式张紧器的数值模拟[J]. 振动与冲击, 2019, 38(10): 85-91.
CHEN Baiquan1,2，YU Yang1,2，YU Jianxing1,2，XU Lixin1,2，WU Chen1,2，KANG Yuyuan3. Numerical modeling of the hydro-pneumatic tensioner for a top tensioned riser. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(10): 85-91.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2019/V38/I10/85

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