Et profilbilde

Professor II i levetidsforl. av offshore
Gerhard Ersdal { "honorific-suffix": "Professor II i levetidsforl. av offshore", "fn": "Gerhard Ersdal", "tel": "", "email": "gerhard.ersdal@uis.no" }

Avdeling/enhet Det teknisk- naturvitenskapelige fakultet
Institutt/senter Institutt for maskin, bygg og materialteknologi

Forskningsområder

Structural integrity management and life extension of structures
Structural analyses and design.
Risk analysis and reliability analysis of offshore installations and structures.
Accident investigation.
Quality assurance

Utvalgte publikasjoner

PUBLICATIONS:

Ersdal, G. Assessment of existing structures for life extension. PhD Thesis. University of Stavanger, 2005.

Ersdal, G (Ed) ?Green water workshop: NPD 12.05.2000?, Norwegian Petroleum Directorate 2000.

JOURNAL PAPERS:

Sørensen, J.D. and Ersdal, G.: Safety and inspection planning of older installations. Journal of Risk and Reliability. Vol 222No O3, September 2008, pp. 403-418, I Mech E

Ersdal, G., Kvitrud, A., Jones, W., Birkinshaw, M.: ?Life extension for mobile offshore units require robust management: How old is too old?? Journal of International Association of Drilling Contractors September/October 2008. Also reprinted in International Association of Drilling Contractors booklet on Asset integrity 2008.

Ersdal, G and Aven T. Risk based decisions and its ethical basis. Reliability Engineering and system Safety 93 (2008) 197-205, Elsevier.

CONFERENCE PAPERS:

Dahle, I.B., Dybvig, G., Ersdal, G., Gulbrandsen, T., Hanson, B.A., Tharldsem, J.E., Wiig, S.: Major accidents and their consequence for risk regulation?, Proceedings of ESREL 2011

Ersdal, G., Spilde, H.K., Hørnlund, E.: ?Experience from Norwegian programme on ageing and life extension?, OMAE 2011. Proceedings of OMAE 2011, the 30th International Conference on Offshore Mechanics and Artic Engineering, Rotterdam, The Netherlands. 2011

Landet, E., Oma, N., Ersdal, G., Sigurdsson, G., Sørensen, T.:?Assessment of ageing structures ? case study?, OMAE 2011. Proceedings of OMAE 2011, the 30th International Conference on Offshore Mechanics and Artic Engineering, Rotterdam, The Netherlands. 2011

Selnes, P.O., Ersdal, G.: ?Industry developed guidelines and standards for ageing and life extension?, OMAE 2011. Proceedings of OMAE 2011, the 30th International Conference on Offshore Mechanics and Artic Engineering, Rotterdam, The Netherlands. 2011

Hörnlund, E., Ersdal, G., Hinderaker, R.H., Johnsen, R.m Sharp, J.V.: ?Material issues in ageing and life extension?. Proceedings of OMAE 2011, the 30th International Conference on Offshore Mechanics and Artic Engineering, Rotterdam, The Netherlands. 2011

Sharp, J.V., Ersdal, G., Galbraith, D.: ?Use of Capability Maturity Modelling to ensure aging and life extension are adequately considered in structural integrity management?, Proceedings of OMAE 2011, the 30th International Conference on Offshore Mechanics and Artic Engineering, Rotterdam, The Netherlands. 2011

Hårbrekke, S., Bodsberg, L., Hokstad, P., Ersdal, G.: ?Issues for consideration in life extension and managing ageing facilities?, Proceedings of OMAE 2011, the 30th International Conference on Offshore Mechanics and Artic Engineering, Rotterdam, The Netherlands. 2011

Selnes, P.O., Ersdal, G.: ?Life extension of ageing petroleum facilities offshore?, SPE International Conference on HSE, Rio de Janeiro 12-14 April 2010

Solland, G., Lotsberg, I., Bjørheim, L. G., Ersdal, G., Gjerstad, V.A., Smedley, P.: ?New standard for assessment of structural integrity for existing load-bearing structures NORSOK N-006?, Proceedings of OMAE 2009, the 28th International Conference on Offshore Mechanics and Artic Engineering, Honolulu, Hawaii. 2009

Hart, K., Ersdal, G., Wintle, J., Smith, S, Sharp, J.V., Galbraith, D., Terry, E., ?Assessing the impact of ageing Safety Critical Elements in offshore installations and how the ageing processes impact the role of SCEs to act as barriers to Major Accidents?, ICHEME NW BRANCH SYMPOSIUM ? 10-12 November 2009 - University of Manchester, UK

Sharp, J. V., Ersdal, G., Galbraith, D., 2008, ?Development of Key Performance Indicators for Offshore Structural Integrity?, Proceedings of OMAE 2008, the 27th International Conference on Offshore Mechanics and Arctic Engineering, Estoril, Portugal. 2008

Hörnlund, E., Sævik, Ø., Hinderaker, R.H. and Ersdal, G., Ageing of materials, Proceedings of OMAE 2008, the 27th International Conference on Offshore Mechanics and Arctic Engineering, Estoril, Portugal. 2008

Sørensen, J.D. and Ersdal, G..: Risk based inspection of ageing structures?, OMAE 2008. Proceedings of OMAE 2008, the 27th International Conference on Offshore Mechanics and Artic Engineering, Estoril, Portugal. 2008

Ersdal, G., Hörnlund, E.: ?Assessment of offshore structures for life extension?, Proceedings of OMAE 2008, the 27th International Conference on Offshore Mechanics and Arctic Engineering, Estoril, Portugal. 2008

Kvitrud, A., Ersdal, G., Vinnem, J.E.: ?Risk indicators for major accidents on load bearing structures and maritime systems in the petroleum industry?, Proceedings of OMAE 2008, the 27th International Conference on Offshore Mechanics and Arctic Engineering, Estoril, Portugal. 2008

Sørensen, J.D. and Ersdal, G.: Safety and inspection planning of older installations. Esrel conf. Stavanger, Risk, Reliability and Societal Safety ? Aven & Vinnem (eds), 2007, Taylor & Francis, UK, pp. 2535-2542

Ersdal, G. and Friis-Hansen, A. (2004). Safety barriers in offshore drill rigs derived from accident investigation, Proceedings of OMAE 2004, the 23rd International Conference on Offshore Mechanics and Artic Engineering, Vancouver, Canada.

Ersdal, G., Kübler, O., Faber, M.H., Sørensen, J.D. and Langen, I. (2004). Economic optimal reserve strength for jacket structures, ASRANET 2004, Barcelona, Spain, ASRANET.

Ersdal, G., Sørensen, J.D. and Langen, I. (2003), Updating of structural failure probability based on experienced wave loading, Proceedings of ISOPE 2003, 13th International Offshore and Polar Engineering Conference, Kushu, Japan.

Ersdal, G. (2002). On safety of fixed offshore structures, failure paths and barriers, Proceedings of OMAE 2002, the 21st International Conference on Offshore Mechanics and Artic Engineering, Oslo, Norway.

Kvitrud, A, Ersdal, G and Leonardsen R.L.: On the Risk of Structural failure on Norwegian Offshore Installations, ISOPE 2001, Stavanger, Norway


Leonardsen R.L., Ersdal, G and Kvitrud, A: Experience and Risk assessment of FPSOs in use on the Norwegian Continental Shelf - Descriptions of Events, ISOPE 2001, Stavanger, Norway


Ersdal, G and Kvitrud, A: Green water incidents on Norwegian production ships, HSE workshop, 27. September 2000


Ersdal, G and Kvitrud, A: Green water on Norwegian production ships, ISOPE 2000, Seattle, USA

Pågående forskning

Arbeidserfaring

University of Stavanger, Professor, 11 / 2012 - Present

Petroleum Safety Authority - Norway, Principal Engineer, 1 / 2004 - Present

Norwegian Petroleum Directorate, Principal Engineer, 02 / 1999 - 12 / 2003

Multiconsult, Principal Engineer, 01 / 1992 - 01 / 1999

Vitenskapelige publikasjoner (fra CRISTin)

  • Ersdal, Gerhard (2017). Safety Barriers in Structural and Marine Engineering. I: ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering - Volume 9: Offshore Geotechnics; Torgeir Moan Honoring Symposium. ASME Press. ISBN 978-0-7918-5777-9.
  • Sæstad, Alexander; Ersdal, Gerhard; Siriwardane, S.A. Sudath C. (2016). Comparison of Deterministic and Probabilistic Fatigue Assessment Methods: A Case Study of a Road Bridge. I: 19th Congress of IABSE, Challenges in Design and Construction of an Innovative and Sustainable Built Environment. International Association for Bridge and Structural Engineering. ISBN 978-3-85748-144-4. s. 275-283.
  • Tharaldsen, Jorunn Elise; Wiig, Siri; Østnes, Hilde Karin; Ersdal, Gerhard; Hinderaker, Rolf H.; Lootz, Elisabeth; Knudsen, Sigve; Hanson, Bjørn Andreas; Dybvig, Gunnar; Lauridsen, Øyvind (2013). A System Perspective on Organizational Learning. I: SPE European HSE Conference and Exhibition - Health, Safety, Environment and Social Responsibility in the Oil &Gas Exploration, Apr 16 - 18, 2013 2013, London, United Kingdom. Society of Petroleum Engineers. ISBN 978161399256-2.
  • Wiig, Siri; Ersdal, Gerhard; Guldbrandsen, Tone; Hanson, Bjørn Andreas; Tharaldsen, Jorunn Elise; Dybvig, Gunnar; Dahle, Irene Bergljot (2012). Major accidents and their consequences for risk regulation. I: Advances in Safety, Reliability and Risk Management - proceedings of the European Safety and Reliability Conference, ESREL 2011. CRC Press. ISBN 978-0-415-68379-1. s. 33-41.
  • Hörnlund, Erik; Ersdal, Gerhard; Hinderaker, Rolf H.; Johnsen, Roy; Sharp, John M. (2011). Material Issues in Ageing and Life Extension (OMAE2011-49363). I: 30th International Conference on Ocean, Offshore and Arctic Engineering (OMAE2011) - Vol. III. ASME Press. ISBN 978-0-7918-4435-9. s. 261-267.
  • Håbrekke, Solfrid; Bodsberg, Lars; Hokstad, Per; Ersdal, Gerhard (2011). Issues for Consideration in Life Extension and Managing Ageing Facilities. I: 30th International Conference on Ocean, Offshore and Arctic Engineering (OMAE2011) - Vol. III. ASME Press. ISBN 978-0-7918-4435-9. s. 173-182.
  • Ersdal, Gerhard; Aven, Terje (2008). Risk informed decision-making and its ethical basis. Reliability Engineering & System Safety. ISSN 0951-8320. Volum 93. Hefte 2. s. 197-205. DOI: 10.1016/j.ress.2006.12.018.
  • Ersdal, Gerhard; Aven, Terje (2008). Risk management and its ethical basis. Reliability Engineering & System Safety. ISSN 0951-8320. Volum 92. Hefte 2. s. 197-205.
  • Aven, Terje; Ersdal, Gerhard (2005). Risk management and its ethical basis.
  • Moan, Torgeir; Amdahl, Jørgen; Ersdal, Gerhard (2016). Assessment of ship impact risk to offshore structures - new NORSOK N-003 guidelines. International Association of Oil and Gas Producers; 2016-09-14 - 2016-09-16.
  • Ersdal, Gerhard; Haleem, Hesham; Ratnayake, R.M. Chandima (2015). Panel Discussion: Extending the Life of Aging Assets in the North Sea and Around the Globe. 2015-02-11 - 2015-02-12.
  • Ersdal, Gerhard; Sharp, John; Galbraith, David (2014). Ageing accidents – suggestion for a definition and examples from damaged platforms. ASME; 2014-06-08 - 2014-06-13.
  • Ersdal, Gerhard; Sharp, John; Galbraith, David (2014). LESSONS LEARNED FROM AUDITING STRUCTURAL INTEGRITY MANAGEMENT. ASME; 2014-06-08 - 2014-06-13.
  • Ersdal, Gerhard; Kübler, Oliver; Faber, Michael H; Sørensen, John Dalsgaard; Haver, Sverre; Langen, Ivar (2004). Economic Optimal Reserve Strength for a Jacket Structure. 2004-07-05 - 2004-07-07.
  • Ersdal, Gerhard; Sørensen, John Dalsgaard; Langen, Ivar (2003). Updating of structural failure probability based on experienced wave loading. 2003-05-25 - 2003-05-30.
  • Ersdal, Gerhard; Langen, Ivar (2002). On Assessment of Existing Offshore Structures. 2002-05-26 - 2002-05-31.