...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Marine Structures >Environmental lumping for efficient fatigue assessment of large-diameter monopile wind turbines
【24h】

Environmental lumping for efficient fatigue assessment of large-diameter monopile wind turbines

机译：大直径摩托风力涡轮机有效疲劳评估的环境小关

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Fatigue damage is one of the governing factors for the design of offshore wind turbines. However, the full fatigue assessment is a time-consuming task. During the design process, the site-specific environmental parameters are usually condensed by a lumping process to reduce the computational effort. Preservation of fatigue damage during lumping requires an accurate consideration of the met-ocean climate and the dynamic response of the structure. Two lumping methods (timedomain and frequency-domain) have been evaluated for a monopile-based 10 MW offshore wind turbine, both based on damage-equivalent contour lines. Fatigue damage from lumped load cases was compared to full long-term fatigue assessment. The lumping methods had an accuracy of 94?98% for the total long-term fatigue damage and 90% for individual wind speed classes, for aligned wind and waves. Fatigue damage was preserved with the same accuracy levels for the whole support structure. A significant reduction of computational time (93%) was achieved compared to a full long-term fatigue assessment. For the cases with 30? and 60? wind-wave misalignment, there was a mean underestimation of approximately 10%. Variations in penetration depth did not affect the selection of the lumped sea-state parameters. This work presents a straightforward method for the selection of damage-equivalent lumped load cases, which can adequately preserve long-term fatigue damage throughout the support structure, providing considerable reduction of computational effort.
机译：疲劳损坏是近海风力涡轮机设计的控制因素之一。然而，完全疲劳评估是耗时的任务。在设计过程中，特定于场地的环境参数通常由集合过程凝聚，以减少计算工作。在集团期间保护疲劳损坏需要准确地考虑欧海气候和结构的动态响应。已经基于损坏等效轮廓线评估了两种基于型10 MW海上风力涡轮机的两次集合方法（时间域和频率域）。将集体载重箱疲劳损坏与全长疲劳评估进行比较。绝地形方法的精度为94Ω·98％，对于总长期疲劳损坏和90％的单个风速等级，用于对齐的风和波。为整个支撑结构的精度水平保持疲劳损坏。与完整的长期疲劳评估相比，实现了计算时间（93％）的显着降低。适用于30个？和60？风波未对准，平均低估约10％。渗透深度的变化不影响集体海区参数的选择。这项工作介绍了选择损坏的损坏等同的集成载荷箱的直接方法，这可以在整个支撑结构中充分保持长期疲劳损坏，提供了相当大的计算工作减少。

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