...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ocean Engineering >Structural reliability of offshore platforms considering fatigue damage and different failure scenarios
【24h】

Structural reliability of offshore platforms considering fatigue damage and different failure scenarios

机译：考虑疲劳损伤和不同破坏场景的海上平台的结构可靠性

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

Structural systems will normally fail as a consequence of a chain of different components failure es. In this paper, fatigue reliability of fixed offshore platforms is investigated by analyzing different failure scenarios. In order to evaluate the occurrence probability of a special scenario, it is divided into a finite number of sub-scenarios. All combinations of time sequences are generated for a given sequence of failures, using a specially developed program. In order to calculate the occurrence probability of each scenario, a massive reliability analysis should be done for each of corresponding sub-scenarios. A large number of sub-scenarios should be analyzed, therefore implementing time consuming traditional methods for evaluating fatigue reliability may be unrealistic, and a simplified and accurate method is required. Herein, an "Artificial transfer function" is used to calculate the cumulative fatigue degradation in components. The preciseness of the proposed method is evaluated using a numerical model, and then, it is used to calculate the occurrence probability of each sub-scenario. Based on the calculated values, probability of occurrence is obtained for each scenario, and finally, the failure probability of entire system is calculated. The proposed method can be used in inspection planning and evaluating the life extension of existing offshore platforms.
机译：结构系统通常会由于一系列不同的组件故障而失败。本文通过分析不同的失效场景来研究固定式海上平台的疲劳可靠性。为了评估特殊场景的发生概率，将其划分为有限数量的子场景。使用专门开发的程序，针对给定的故障序列生成时间序列的所有组合。为了计算每种情况的发生概率，应对每个子情况进行大量的可靠性分析。应该分析大量子场景，因此，实施耗时的传统方法来评估疲劳可靠性可能是不现实的，因此需要一种简化且准确的方法。这里，“人工传递函数”用于计算部件中的累积疲劳劣化。使用数值模型评估该方法的准确性，然后将其用于计算每个子场景的发生概率。基于计算值，获得每种情况下的发生概率，最后，计算整个系统的故障概率。所提出的方法可用于检查计划和评估现有海上平台的使用寿命。

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