PSI - Issue 5
ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com cienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Struc ural Integrity 5 (2017) 1051–1056 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2017) 000 – 000 il l li t . i ir t. i i tructural Integrity rocedia 00 (2017) 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. 2nd International Conference on Structural Integrity, ICSI 2017, 4-7 September 2017, Funchal, Madeira, Portugal The dynamic behavior of the extremely skew railway bridge „Oskar“ Pavel Ryjáček a *, Michal Polák a , Tomáš Plachý a , Jiří K ašpárek a a Czech Technical University in Prague, Faculty of Civil Engineering, Thákurova 7, 160 00 Praha 6, Czech Republik The paper describes the behavior of the new railway bridge in the Czech Republic, located on the track between Hohenau and Přerov. The bridge is a net arc structure of span 97.5 m and skew angle 43°. The bridge is equipped with the steering bar Me yer – Wunstorf, because of the reduction of the stresses in the track, caused by the train-bridge interaction. Those unique features led to the throughout dynamic analysis and testing. The paper describes the results of the numerical model, where the bridge response to the trains with speed of up to 160 km/h was analyzed. The first results were not successful, as the transversal vibrations induced significant exciting of the tension bars. Thus several modifications had to be done, such as ballast weight, stiffening of the structure etc. Also, the impact of the skew supports was analyzed on the parametric study on various models with different angles. After the construction of the bridge, several extensive load tests were performed here. The main results are described and discussed here. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. Keywords: arch bridge; dynamic test; modal shapes; skew bridge 1. Bridg d scription The new railway bridge was recently built in The Czech Republic in Břeclav , small town located close to the Austrian and Slovakian border. The bridge is a net arch structure of span 97.5 m and skew angle 43°. The bridge is made from steel and consists of two main box girders, box arches and hangers, which are formed to the net style. The bridge deck is made also from steel as an orthotropic deck with cross beams and longitudinal stiffeners. tr t r l I t rit , I I , - t r , l, Ma eir , rt l Pavel Ryjáček a *, Michal Polák a , Tomáš Plachý a , Jiří K ašpárek a a zech echnical niversity in rague, aculty of ivil ngineering, hákurova 7, 160 00 raha 6, zech epublik str ct e a er escri es t e e a i r f t e e rail a ri e i t e zec e lic, l cate t e trac et ee e a a řer . e ri e is a et arc str ct re f s a . a s e a le °. e ri e is e i e it t e steeri ar e er st rf, eca se f t e re cti f t e stresses i t e trac , ca se t e trai - ri e i teracti . se i e feat res le t t e t r t a ic a al sis a testi . e a er escri es t e res lts f t e erical el, ere t e ri e res se t t e trai s it s ee f t / as a al ze . e first res lts ere t s ccessf l, as t e tra s ersal i rati s i ce si ifica t e citi f t e te si ars. s se eral ificati s a t e e, s c as allast ei t, stiffe i f t e str ct re etc. ls , t e i act f t e s e s rts as a al ze t e ara etric st ari s els it iffere t a les. fter t e c str cti f t e ri e, se eral e te si e l a tests ere erf r e ere. e ai res lts are described and discussed here. e uthors. Published by Else ier B.V. Peer-review under responsibility of the Scie tific ittee of IC I 2017. Keywords: arch bridge; dynamic test; modal shapes; ske bridge . i s i ti r il ri s r tl ilt i li i ř l , s ll t l t l s t t stri l i r r. ri is t r str t r f s . s l °. ri is fr st l sists f t i ir rs, r s rs, i r f r t t t st l . ri e de is ls fr st l s rthotropic deck with cross beams and longitudinal stiffeners. © 2017 The Auth rs. Published by Els vier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation. Abstract I t r ti l f r
2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. 2452-3216 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017 10.1016/j.prostr.2017.07.069 * Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452-3216 © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. 2452-3216 2017 he uthors. ublished by lsevier . . eer-re ie er res si ilit f t e cie tific ittee f I I . * Corresponding author. Tel.: +420-602-250-860; fax: +420-233-337-466 E-mail address: pavel.ryjacek@fsv.cvut.cz * orresponding author. el.: 420-602-250-860; fax: 420-233-337-466 - ail address: pavel.ryjacek fsv.cvut.cz
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