引言在疲劳寿命的估算中,对深水结构的动力反应的了解是很关键的。对自振周期超过三秒的小阻尼自振振型的结构尤其是这样。只有很少这样的结构,即在大多数海况条件下呈线性反应,并有足够简单的外形,因而能对它在定向传播的随机海浪中的动力反应 Introduction In the estimation of fatigue life, understanding the dynamic response of deep-water structures is critical. This is especially true of structures that have small self-damping modes that have a period of self-vibration of more than three seconds. There are few such structures, that is, a linear response under most conditions of the sea, and a sufficiently simple shape, so that they can respond to its dynamics in a directionally propagating random wave.