平台运动下深水钻井隔水管非线性动力响应研究

建立深水钻井隔水管在波、流和平台运动的联合作用下的运动方程,模拟1 000 m深水钻井隔水管的非线性动力响应.分析在波、流作用下钻井液密度和顶部张力比等因素对隔水管振动频率的影响,研究平台的静偏移和动态运动对隔水管最大弯矩分布的影响.结果表明,平台运动对深水钻井隔水管的动力响应有较大影响,使隔水管上部最大弯矩峰值增加了1倍多.

Study on nonlinear dynamic response of deepwater drilling riser with vessel motions

The governing equation of deepwater drilling riser,subject to wave,current and vessel motions,is formulated to analyze nonlinear dynamic response of 1 000 m deepwater drilling riser.A study is conducted to investigate!the effect of mud density and top tension ratio on the vibration frequencies of deepwater drilling riser,subject to wave and current,and the effect of vessel static offset and vessel motion on the maximum bending moment distribution along the riser.The results show that vessel motion has an important effect on the dynamic response of deepwater drilling riser,and leads to an increase of upper maximum bending moment by two times.