STORMLAMP - STructural behaviour Of Rock Mounted Lighthouses At the Mercy of imPulsive waves

STORMLAMP - 岩石灯塔在冲击波的影响下的结构行为

• 批准号: EP/N022947/1
• 负责人: Alison Raby
• 金额: $ 57.73万
• 依托单位: Plymouth University
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2016
• 资助国家: 英国
• 起止时间: 2016 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FN022947%2F1
• 关键词: STORMLAMP; STructural; behaviour; Rock; Mounted

Historic rock-mounted lighthouses play a vital role in the safe navigation around perilous reefs. However their longevity is threatened by the battering of waves which may be set to increase with climate change. Virtual navigational aids such as GPS are fallible, and reliance on them can be disastrous. Mariners will therefore continue to need the physical visual aids of these strategic structures. The loss of any reef lighthouse will be incalculable in terms of safety, trade and heritage.Plymouth University has trialled the use of recording instruments to capture limited information on the loading and response of Eddystone Lighthouse, with the support of the General Lighthouse Authorities (GLAs) having legal responsibility to safeguard aids to marine navigation around the British Isles. The study evaluated the extreme logistical constraints of lighthouse operations and the feasibility of using instrumentation to understand the response of the lighthouse to wave loads, with results strongly encouraging a comprehensive study of the load and response environment.Hence a full-scale project is proposed whereby field, laboratory and mathematical/computer modelling methods, novel both individually and collectively, will be used to assess six of the most vulnerable rock lighthouses in the UK and Ireland. Depending on the findings the investigation will then focus on extended full-scale evaluation of one lighthouse for the following two winters.The field instrumentation run by University of Exeter, and which will include modal testing and long term instrumentation will require novel procedures and technologies to be created to deal with the challenging environmental and logistical constraints e.g. of access, timing power.The modal test data will be used to guide the creation, by UCL, of sophisticated multi-scale numerical simulations of lighthouses that can be used with the data to diagnose observed performance in the long-term monitoring.The numerical structural model will also be linked with advanced physical modelling at Plymouth University's COAST Laboratory, and numerical (computational fluid dynamic) simulations.Finally, based on the structural and wave loading models, the long term monitoring will be used to characterize the wave loading in-situ at full scale. Outcomes of the project will be used to inform the comprehensive structural health monitoring of other lighthouses both in the British Isles and further afield through the International Association of Lighthouse Authorities. This will lead to the identification of structural distress and reduction in the risk of failure through preventative measures. Methods developed will also be of relevance to other masonry structures under wave loads so the project team includes a number of industrial partners: AECOM, Atkins, HR Wallingford and the Environment Agency who have interests in this area. As the UK has a large number of ageing coastal defences whose vulnerability to wave load was demonstrated in the winter 2013/14 storms, the applicability of the STORMLAMP findings to these structures is an important additional benefit of the project.

历史悠久的岩石灯塔在危险珊瑚礁周围的安全航行中发挥着至关重要的作用。然而，它们的寿命受到海浪的威胁，随着气候变化，海浪可能会增加。像GPS这样的虚拟导航设备是不可靠的，依赖它们可能是灾难性的。因此，海员将继续需要这些战略结构的有形视觉辅助设备。任何珊瑚礁灯塔的损失在安全、贸易和遗产方面都是无法估量的。普利茅斯大学在一般灯塔管理局（GLAs）的支持下，尝试使用记录仪器来记录埃迪斯通灯塔的装载和响应的有限信息，GLAs有法律的责任来保护不列颠群岛周围的海上航行。该研究评估了灯塔运作的极端后勤限制，以及使用仪器了解灯塔对波浪载荷的反应的可行性，结果强烈鼓励对载荷和反应环境进行全面研究。因此，建议进行一项全面的项目，利用现场，实验室和数学/计算机模拟方法，单独和集体都是新颖的，将用于评估英国和爱尔兰六座最脆弱的岩石灯塔。根据调查结果，调查将集中在一个灯塔的扩展全面评估，为以下两个冬天。现场仪器由埃克塞特大学运行，将包括模态测试和长期仪器将需要新的程序和技术来处理具有挑战性的环境和后勤限制，例如访问，定时功率。模态测试数据将用于指导UCL创建复杂的灯塔多尺度数值模拟，这些数值模拟可以与数据一起用于诊断长期监测中观察到的性能。数值结构模型还将与普利茅斯大学海岸实验室的先进物理模型相关联，最后，基于结构和波浪载荷模型，将使用长期监测来表征全尺度的现场波浪载荷。该项目的成果将用于通过国际灯塔管理局协会对不列颠群岛和更远地区的其他灯塔进行全面的结构健康监测。这将导致结构损坏的识别，并通过预防措施减少失败的风险。开发的方法也将与波浪荷载下的其他砌体结构相关，因此项目团队包括许多工业合作伙伴：AECOM，阿特金斯，HR Wallingford和环境署，他们对这一领域感兴趣。由于英国有大量老化的海岸防护设施，其对波浪荷载的脆弱性在2013/14年冬季风暴中得到了证明，因此STORMLAMP结果对这些结构的适用性是该项目的一个重要额外好处。

项目成果

Experimental modal analysis of British rock lighthouses

• DOI: 10.1016/j.marstruc.2018.07.001
• 发表时间: 2018-11-01
• 期刊: MARINE STRUCTURES
• 影响因子: 3.9
• 作者: Brownjohn, James Mark William;Raby, Alison;Dobson, Peter
• 通讯作者: Dobson, Peter

Survivability assessment of fastnet lighthouse

• DOI: 10.9753/icce.v36.structures.46
• 发表时间: 2018-12
• 期刊: Coastal Engineering
• 影响因子: 4.4
• 作者: A. Antonini;A. Raby;J. Brownjohn;A. Pappas;D. D’Ayala

A Bayesian inverse dynamic approach for impulsive wave loading reconstruction: Theory, laboratory and field application

• DOI: 10.1016/j.coastaleng.2021.103920
• 发表时间: 2021-09
• 期刊: Coastal Engineering
• 影响因子: 4.4
• 作者: A. Antonini;J. Brownjohn;D. T. Dassanayake;A. Raby;James Bassit;A. Pappas;D. D’Ayala

Bayesian operational modal analysis of offshore rock lighthouses: Close modes, alignment, symmetry and uncertainty

• DOI: 10.1016/j.ymssp.2019.106306
• 发表时间: 2019-11
• 期刊: Mechanical Systems and Signal Processing
• 影响因子: 8.4
• 作者: J. Brownjohn;A. Raby;S. Au;Zuo Zhu;Xinrui Wang;A. Antonini;A. Pappas;D. D’Ayala

Understanding and managing identification uncertainty of close modes in operational modal analysis

• DOI: 10.1016/j.ymssp.2020.107018
• 发表时间: 2021-01-15
• 期刊: MECHANICAL SYSTEMS AND SIGNAL PROCESSING
• 影响因子: 8.4
• 作者: Au, Siu-Kui;Brownjohn, James M. W.;Raby, Alison
• 通讯作者: Raby, Alison