PSI - Issue 14

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at www.sciencedire t.com Sci ceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 14 (2019) 656–663 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000 – 000

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XV Portuguese Conference on Fracture, PCF 2016, 10-12 February 2016, Paço de Arcos, Portugal Thermo-mechanical modeling of a high pressure turbine blade of an airplane gas turbine engine P. Brandão a , V. Infante b , A.M. Deus c * a Department of Mechanical Engineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal b IDMEC, Department of Mechanical Engineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal c CeFEMA, Department of Mechanical Engineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal Abstract During their operation, modern aircraft engine components are subjected to increasingly demanding operating conditions, especially the high pressure turbine (HPT) blades. Such conditions cause these parts to undergo different types of time-dependent degradation, one of which is creep. A model using the finite element method (FEM) was developed, in order to be able to predict the creep behaviour of HPT blades. Flight data records (FDR) for a specific aircraft, provided by a commercial aviation company, were used to obtain thermal and mechanical data for three different flight cycles. In order to create the 3D model needed for the FEM analysis, a HPT blade scrap was scanned, and its chemical composition and material properties were obtained. The data that was gathered was fed into the FEM model and different simulations were run, first with a simplified 3D rectangular block shape, in order to better establish the model, and then with the real 3D mesh obtained from the blade scrap. The overall expected behaviour in terms of displacement was observed, in particular at the trailing edge of the blade. Therefore such a model can be useful in the goal of predicting turbine blade life, given a set of FDR data. © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers. 2nd International Conference on Structural Integrity and Exhibition 2018 Relocation of existing jacket platform in western offshore of india Praveen Bhat a* , S. Karunanithi b a Institute of Engineering & Ocean Technology (IEOT)-ONGC-Panvel-Mumbai 410206, India b Institute of Engineering & Ocean Technology (IEOT)-ONGC-Panvel-Mumbai 410206, India Abstract ONGC (Oil & Natural Gas Corporation Limited) started its hunt for “Black Gold” in the Indian western offshore region in 1976 and is currently operating more than 285 fixed steel platforms in water depths ranging between 25-90m. Many of the existing wells on the platforms have matured over a period of time, resulting in decline of productivity, even after employing usage of Improved Oil Recovery (IOR)/Enhanced Oil Recovery (EOR) techniques. Considering the techno-commercial constraints for offshore development, IEOT-ONGC has tak n up a study for e-location of exist ng non-producing offsh re platform to a newer location. The structural adequacy of the existing structures at new locations has been ascertained for 100 year return period extreme storm conditions for 8 different directions and other design loads as per API RP 2A (WSD) ( Ref. 1 ), considering in-situ met-ocean and soil conditions in the new field. The structural integrity assessment procedure explores the need for strengthening/mitigation measures in case the inherent capacity of the structure to withstand the incoming loading is not sufficient at the new site of installation. For relocation of existing jacket platforms to new locations at different water depths in western offshore of India, a general philosophy for foundation design has been developed considering installation of plinth platform for relocation to field where water depth is higher than existing one and installation of insert piles and extra clamp-on skirt piles, if required, where water depth at relocation is similar to existing water depth for the platform. In this paper, relocation methodology of existing well head platforms for use at new locations in Western offshore of India at similar or different water depths has been discussed covering foundation philosophy, well plugging and abandonment (P&A), decommissioning and refurbishment aspects. © 2018 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers. 2nd International Conference on Structural Integrity and Exhibition 2018 Relocation of existing jacket platform in western offshore of india Praveen Bhat a* , S. Karunanithi b a tit t f i i l l i , i b Institute of Engineering & Ocean Technology (IEOT)-ONGC-Panvel-Mumbai 410206, India Abstract ONGC (Oil & Natural Gas Corpor tion Limited) started its hunt for “Black Gold” in the Indian western offshore region in 1976 and is curr ntly operating more than 285 fixed steel platforms in water pths ranging be ween 25-90m. Many f the existing wells on the platforms have matured over a period of time, resulting in decline of productivity, even after employi g usage f Impr v Oil Recov ry (IOR)/Enh nced Oil Recovery (EOR) te hniques. Considering the techno-comm rcial constraints fo offsh re dev lopment, IEOT-ONGC has taken up a st dy for re-locati n of existing no -produc g o fshore platform to a n wer location. The structural adequacy of the existing structur s at new locations has been ascertained for 100 year r turn period extrem storm conditions for 8 different dir ctions and other design oads as per API RP 2A (WSD) ( Ref. 1 ), consid ri g in-situ met-ocea and soil conditions in the new f eld. The struc ural integrity assessment procedure explores the need f r trengthening/mitigation measures n case the inherent capacity of the structure to ithst nd the incomi g loading is not sufficient at the new site of installation. F r relocation f existi g jacket platforms to new locations at different water depths in weste n offshore of I dia, a general philosophy for foundatio de ig has been developed considering installation of plinth platform for relocation to field where water depth is higher than existing one and installation of insert piles and extra clamp-on skirt piles, if required, wher water dep h at rel cation is simi ar to existing wat depth for the platform. In this paper, location met odology of ex sting well head platforms for use at new locations in Western offshore of India at similar or d fferent w ter d pths as been discussed covering foundation philosophy, well plugging and abandonment (P&A), decommissioning and refurbishment aspects. © 2018 The Authors. Published by Elsevier B.V. This is an open access article und r the CC BY-NC-ND lic nse (https://creat vecommons.org/licenses/by- c-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers. © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Keywords: Relocation; Plinth platform; P&A; Decommissioning Keywords: Relocation; Plinth platform; P&A; Decommissioning

Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation.

* Corresponding author. Tel.: +91-22-27486390; fax: +91-22-27453692. E-mail address: bhat_praveen@ongc.co.in * Correspon ing author. Tel.: +91-22-27486390; fax: +91-22-27453692. E-mail address: bhat_praveen@ongc.co.in

2452-3216 © 2018 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers. 2452-3216 © 2018 The Authors. Published by Elsevier B.V. This is a open access article und r the CC BY-NC-ND lic nse (https://creat vecommons.org/licenses/by- c-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers.

* Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt

2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. 2452-3216  2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers. 10.1016/j.prostr.2019.05.081