STORMLAMP - STructural behaviour Of Rock Mounted Lighthouses At the Mercy of imPulsive waves
Lead Research Organisation:
University of Exeter
Department Name: Engineering Computer Science and Maths
Abstract
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Organisations
People |
ORCID iD |
| James Brownjohn (Principal Investigator) |
Publications
Antonini A
(2021)
A Bayesian inverse dynamic approach for impulsive wave loading reconstruction: Theory, laboratory and field application
in Coastal Engineering
Antonini A
(2019)
Survivability assessment of fastnet lighthouse
in Coastal Engineering
Au S
(2021)
Understanding and managing identification uncertainty of close modes in operational modal analysis
in Mechanical Systems and Signal Processing
Brownjohn J
(2017)
Modal testing of offshore rock lighthouses around the British Isles
Brownjohn J
(2018)
Experimental modal analysis of British rock lighthouses
in Marine Structures
Brownjohn J
(2019)
Bayesian operational modal analysis of offshore rock lighthouses: Close modes, alignment, symmetry and uncertainty
in Mechanical Systems and Signal Processing
Brownjohn J
(2017)
Modal testing of offshore rock lighthouses around the British Isles
in Procedia Engineering
Brownjohn JMW
(2018)
Bayesian operational modal analysis of offshore rock lighthouses for SHM
Dassanayake D
(2021)
Influence of the Spatial Pressure Distribution of Breaking Wave Loading on the Dynamic Response of Wolf Rock Lighthouse
in Journal of Marine Science and Engineering
Khosroshahi S
(2022)
A Multidisciplinary Computational Framework for Topology Optimisation of Offshore Helidecks
in Journal of Marine Science and Engineering
Raby AC
(2019)
Wolf Rock lighthouse: past developments and future survivability under wave loading.
in Philosophical transactions. Series A, Mathematical, physical, and engineering sciences
| Description | Forced vibration using a 'shaker' enables identification of at least the fundamental modes of vibration. Where there is a helideck, there are up to 4 'fundamental' modes, in two directions and with different phase with respect to the masonry structure. Helidecks modify the modal mass, a key parameter controlling the response to external horizontal loads. For Wolf Rock, the identified modal parameters provide a means to estimate the breaking wave modal impulses. Monitoring data for the 2017/2018 winter storm season corroborate wave tank data on extreme loads. Fastnet's extreme wave climate shows no statistically significant effects of due to the climate change. Lighthouses are not affected by direct breaking wave loadings but by broken wave impacts - intensity is reduced but duration is increased, compared to unbroken wave. Wave load does not vary linearly with breaking distance - depends on whether the wave can regenerate after it first breaks, so depends on precise bathymetry. Impulsive force is always larger than the quasi-static force. Force laboratory data can be effectively analysed by means of seismic analysis techniques such as deconvolution and Duhamel integral. Structural response of lighthouses due to waves is governed by uplift and rocking. DEM and FEM with contact interfaces between discontinuous blocks successfully used for modelling extreme wave impacts. Limit analysis used for assessing failure using Python code used on 6 lighthouses - size, shape, density, and height above the sea level were found to be crucial. The vulnerability of the lighthouses, in combination with extreme wave hazard can be used for prioritising the detailed analysis and structural assessment. |
| Exploitation Route | There is an unrelated but parallel project on lighthouses being undertaken in France. We are exchanging findings with those investigators. |
| Sectors | Construction,Digital/Communication/Information Technologies (including Software),Environment,Culture, Heritage, Museums and Collections,Transport |
| URL | https://stormlamp.org.uk/blog |
| Description | We are anticipating that the UK and Irish General Lighthouse Authorities (GLAs) will be changing their approach to the long-term assessment of their rock lighthouses. The final work package of the STORMLAMP project is the development of guidelines for the GLAs and we hope that details from this document will be incorporated into the International Association of Lighthouse Authorities updated Guideline on Extreme Environmental Conditions (Raby was contacted by the relevant IALA committee in February 2020 to see if She could provide information). |
| First Year Of Impact | 2019 |
| Sector | Aerospace, Defence and Marine,Culture, Heritage, Museums and Collections,Transport |
| Description | EPSRC magazine piece |
| Form Of Engagement Activity | A magazine, newsletter or online publication |
| Part Of Official Scheme? | No |
| Geographic Reach | National |
| Primary Audience | Media (as a channel to the public) |
| Results and Impact | The EPSRC's Pioneer magazine 19th edition featured the award winning aerial photograph of Fastnet lighthouse off the coast of Ireland which was captured by Vibration Engineering Section member James Bassitt while he was working off shore on the EPSRC funded STORMLAMP project. |
| Year(s) Of Engagement Activity | 2018 |
| Description | Filmbright film |
| Form Of Engagement Activity | A broadcast e.g. TV/radio/film/podcast (other than news/press) |
| Part Of Official Scheme? | No |
| Geographic Reach | International |
| Primary Audience | Media (as a channel to the public) |
| Results and Impact | Protecting our lighthouses for the safety of mariners - Stormlamp - full length film |
| Year(s) Of Engagement Activity | 2018 |
| Description | Hong Kong lighthouse talk |
| Form Of Engagement Activity | A talk or presentation |
| Part Of Official Scheme? | No |
| Geographic Reach | International |
| Primary Audience | Professional Practitioners |
| Results and Impact | Dr Alison Raby at the University of Plymouth was invited to give a talk at the First International Lighthouse Symposium in Hong Kong |
| Year(s) Of Engagement Activity | 2017 |
| Description | Lighthouses, Bridges and Breakwaters talk |
| Form Of Engagement Activity | A talk or presentation |
| Part Of Official Scheme? | No |
| Geographic Reach | Regional |
| Primary Audience | Public/other audiences |
| Results and Impact | On behalf of Dr Alison Raby at the University of Plymouth: The STORMLAMP project was invited to take part in the Institution of Civil Engineers 200th anniversary celebrations in conjunction with the Plymouth Museum. We gave a talk entitled 'Wave loading on heritage lighthouses in the British Isles' |
| Year(s) Of Engagement Activity | 2018 |
| Description | Presentation at IOMAC conference |
| Form Of Engagement Activity | A talk or presentation |
| Part Of Official Scheme? | No |
| Geographic Reach | International |
| Primary Audience | Professional Practitioners |
| Results and Impact | talk: Brownjohn JMW, Raby A, Au S-K, Zhu Z, Wang X, Antonini A, Bayesian operational modal analysis of offshore rock lighthouses: close modes, alignment, symmetry and uncertainty. IOMAC, Denmark, May 2019 |
| Year(s) Of Engagement Activity | 2019 |
| Description | Presentation at University of Cambridge |
| Form Of Engagement Activity | A talk or presentation |
| Part Of Official Scheme? | No |
| Geographic Reach | National |
| Primary Audience | Professional Practitioners |
| Results and Impact | Presentation about STORMLAMP to University of Cambridge |
| Year(s) Of Engagement Activity | 2018 |
| Description | Refurb workshop and consortium meeting |
| Form Of Engagement Activity | Participation in an activity, workshop or similar |
| Part Of Official Scheme? | No |
| Geographic Reach | Local |
| Primary Audience | Third sector organisations |
| Results and Impact | REFURB workshop (28th June) and REFURB consortium meeting (12th Sept) |
| Year(s) Of Engagement Activity | 2018 |
| Description | STORMLAMP blog |
| Form Of Engagement Activity | Engagement focused website, blog or social media channel |
| Part Of Official Scheme? | No |
| Geographic Reach | International |
| Primary Audience | Media (as a channel to the public) |
| Results and Impact | EPSRC blog about STORMLAMP written by Alison Raby. We connected to this on the VES WordPress blog at https://veswordpresscom.wordpress.com/2019/01/24/check-out-the-epsrc-blog-about-stormlamp/ |
| Year(s) Of Engagement Activity | 2018 |
| URL | https://epsrc.ukri.org/blog/projectstormlamp/ |
| Description | STORMLAMP meetings |
| Form Of Engagement Activity | A formal working group, expert panel or dialogue |
| Part Of Official Scheme? | No |
| Geographic Reach | National |
| Primary Audience | Industry/Business |
| Results and Impact | Meeting to discuss research outputs and industry collaborations |
| Year(s) Of Engagement Activity | 2018 |
| Description | STORMLAMP promotion via blog, LinkedIn, Twitter |
| Form Of Engagement Activity | Engagement focused website, blog or social media channel |
| Part Of Official Scheme? | No |
| Geographic Reach | International |
| Primary Audience | Media (as a channel to the public) |
| Results and Impact | Promotion of STORMLAMP via the Vibration Engineering Section blog (URL below), LinkedIn and Twitter @VibrationUoE |
| Year(s) Of Engagement Activity | 2018 |
| URL | https://veswordpresscom.wordpress.com |
| Description | STORMLAMP team deliver Royal Society journal themed special issue on environmental loading of heritage structures |
| Form Of Engagement Activity | A magazine, newsletter or online publication |
| Part Of Official Scheme? | No |
| Geographic Reach | National |
| Primary Audience | Media (as a channel to the public) |
| Results and Impact | The special issue in Philosophical Transactions of the Royal Society A is about how heritage structures are impacted by environmental factors such as wind and waves. It was led by Prof. Alison Raby, University of Plymouth and joint edited by Prof. James Brownjohn (VES), Prof. Dina D'Ayala of University College London and Dr Alessandro Antonioni of TU Delft. |
| Year(s) Of Engagement Activity | 2019 |
| URL | https://veswordpresscom.wordpress.com/2019/08/23/stormlamp-team-deliver-royal-society-journal-themed... |
| Description | presentation at HEAMES conference |
| Form Of Engagement Activity | A talk or presentation |
| Part Of Official Scheme? | No |
| Geographic Reach | International |
| Primary Audience | Third sector organisations |
| Results and Impact | talk: Brownjohn JMW, Raby A, Antonini A, Bassitt J, Condition assessment and monitoring of rock lighthouses around the British Isles. HEAMES, 23/24 May 2019 Glasgow |
| Year(s) Of Engagement Activity | 2019 |