基于动态刚度阵法的海洋平台动力响应分析

摘要

导管架式海洋平台是人类开发和利用海洋资源的重要工程设施,动态刚度阵法是解决工程中结构振动问题的一个强有力的工具,其可以通过较少的单元数计算出结构固有频率和固有振型,减少结构的自由度数,随着计算频率的升高,DSM法无需进一步细化单元.本文应用DSM法建立导管架式海洋平台模型,将导管架式海洋平台简化成平面刚架结构,计算了导管架式海洋平台在波浪载荷作用下的动力响应,并验证了动态刚度阵法具有计算速度快、计算准确的特点.%The offshore jacket platform is an important facility to develop ocean resources.DSM method is a powerful tool for solving vibration problems in structural engineering.The DSM method can be used to calculate the natural frequency and mode shape by using fewer elements.The method can also decrease the degree-of-freedoms.With the increase of the calculated frequency, the DSM method does not require further refinement of the elements.In this paper, DSM method is used to establish the model of the controlled offshore jacket platform, and the platform is reduced to a plane rigid frame structure.And the numerical simulation dynamic response of the offshore platform under wave loads.Validates DSM method has the characteristics of calculation speed and calculate accurately.