海洋平台结构动力响应优化设计与灵敏度分析

研究了海洋平台结构动力响应优化设计以结构动力响应的灵敏度计算方法。给出了结构稳态频率响应和瞬态时程响应的灵敏度分析算法，并通过数值试验讨论了瞬态响应灵敏度分析算法的精度和差分法中变量摄动量的影响。在JIFEX软件中实现了结构动力响应灵敏度计算，建立海洋平台结构优化模型和求解方法。数值算例表明了本文方法和程序的有效性。

Design optimization and sensitivity analysis of dynamic response of offshore platform structures

The problems in sensitivity analysis and design optimization of dynamic reponse of platforms are studied. The methods for the sensitivity analysis of structural frequency response and transient response are presented respectively. The accuracy of the algorithm for the sensitivity analysis of dynamic transient problems and the influence of variable perturbation on the finite difference method are analysed through a numerical test. The algorithm presented here is implemented in the software system JIFEX, with which the solution way for dynamic design optimization of platforms is established. Numerical examples are shown to demonstrate the efficiency of the method and the computer program developed in the paper.