具有嵌入式预故障指示器的极端结构
Christoffer Fyllgraf Christensen1,2, Jonas Engqvist2, Fengwen Wang1
1Department of Civil and Mechanical Engineering, Technical University of Denmark, Kongens Lyngby 2800, Denmark.
概括
本研究介绍了工程结构的内置预故障指标. 这些指标通过向接近关键负载的信号提供了潜在故障的早期警告,提高了结构安全性和可靠性.
科学领域:
- 结构工程 结构工程
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
背景情况:
- 预先识别负载下潜在的结构故障是一个重大的工程挑战.
- 现有的监测系统可能难以获得或昂贵,特别是在恶劣的环境中,如海上风力轮机.
研究的目的:
- 为工程结构开发创新的内置预故障指标.
- 通过早期预警系统提高结构可靠性和安全性.
- 减少对传统,可能无法获得的传感器的依赖.
主要方法:
- 利用拓优化来设计具有优化载荷能力的多尺度结构.
- 工程指标可通过非关键局部曲折通过接近临界曲折负荷的可见信号条件.
- 探索利用材料可塑性的内存过载指标.
主要成果:
- 在不损害结构完整性的情况下提供早期预警的指标的可行性.
- 对3D打印设计的实验测试显示,与数值模拟有很强的相关性.
- 证实了指示器在预先确定的位置上信号减负或维护需求的潜力.
结论:
- 开发的方法提供了一个主动的安全功能,以提高结构可靠性.
- 这种方法对离岸结构尤其有利,减少了传感器维护需求.
- 引入了一种新的内置早期预警故障系统,以实现更安全的结构设计.
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