首页> 外文期刊>Archives of Computational Methods in Engineering >Optimization of Offshore Steel Jackets: Review and Proposal of a New Formulation for Time-Dependent Constraints
【24h】

Optimization of Offshore Steel Jackets: Review and Proposal of a New Formulation for Time-Dependent Constraints

机译:近海钢夹克的优化:审查和建议对时间依赖约束的新配方

获取原文
获取原文并翻译 | 示例

摘要

In this work, a methodology for the optimization of offshore wind turbine substructures (jacket type) is presented. The use of a coupled model allows for capturing the full dynamic interaction between all the elements. The structural analysis is carried out in the time-domain. A non-linear integration scheme is necessarily applied due to the effects of the rotation of the blades. Environmental actions, such as wind and waves, are considered as loading conditions. Fatigue damage at the welds of the joints is taken into account. The objective function to be minimized is the weight of the structure. The shape and sizing optimization model is stated in terms of two variables that define the overall shape of the jacket, along with the dimensions of the cross-sections of the structural members. The model is subjected to Ultimate Limit Stress (ULS), Fatigue Limit State and natural frequency constraints. The time-dependent ULS constraints are efficiently treated by means of a new formulation that is based on constraint aggregation. Fatigue accumulation during the whole design life of the structure is accurately assessed, without the need for excessively costly numerical simulations. The optimization problem is solved by means of Sequential Linear Programming, what requires a full first order sensitivity analysis to be performed. The efficiency, reliability and robustness of the proposed methodology is demonstrated by optimizing a real jacket design.
机译:在这项工作中,提出了一种用于优化海上风力涡轮机子结构(夹套类型)的方法。耦合模型的使用允许捕获所有元素之间的完全动态交互。结构分析在时域中进行。由于叶片旋转的效果,必须施加非线性积分方案。环境行动(如风和波)被认为是装载条件。考虑关节焊缝的疲劳损坏。要最小化的目标函数是结构的重量。根据两个变量来说明形状和尺寸优化模型,其定义夹套的整体形状,以及结构构件的横截面的尺寸。该模型受到极限压力(ULS),疲劳极限状态和自然频率约束。通过基于约束聚合的新配方有效地处理时间依赖的ULS约束。精确评估结构的整个设计寿命期间的疲劳积累,无需过度昂贵的数值模拟。通过顺序线性编程来解决优化问题,需要进行完整的一阶灵敏度分析。通过优化真正的夹克设计来证明所提出的方法的效率,可靠性和鲁棒性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号