摘要
基于线性波浪理论计算深水立管的动力响应,采用谱分析法推导出传递函数。利用传递函数由海浪谱确定海洋立管中由波流引起的应力谱,给出深水立管在随机波浪和流作用下的疲劳寿命计算公式,以一典型立管为数值算例进行计算,计算结果表明,潮流对立管疲劳寿命也有影响,使其疲劳寿命大大降低。
The dynamic response of the deep-sea riser under wave and current motion loads are calculated by using the linear wave theory, Based on the spectrum analysis method, the Transfer Function is obtained. Using the Transfer Function and wave spectrum, the cyclic stress spectrum, caused by wave and current force can be determined and the predicted fatigue life formula can be obtained. Based on an example, the fatigue life of the deep-sea riser can be affected by the current, and the fatigue life of the deep-sea riser＇s base can be reduced rapidly because of the bigger effect on the moment.
出处
《船海工程》
北大核心
2008年第2期91-94,共4页
Ship & Ocean Engineering
