MARCO PIZZOLI

PhD Graduate

PhD program:: XXXV


advisor: Prof. Franco Mastroddi

Thesis title: Experimental data-driven reduced-order modeling of nonlinear vertical sloshing for aeroelastic analyses

This thesis focuses specifically on the study of nonlinear sloshing effects caused by large tank motions in a direction perpendicular to the free liquid surface with emphasis on aeronautical applications. Sloshing is a phenomenon that typically occurs in aircraft tanks as they are subjected to loads caused by gusts, turbulence and landing impacts. This type of sloshing leads to a noticeable increase in overall structural damping, yet it is generally not modeled in the design phase of modern aircraft. The identification and study of such dissipative effects may enable the development of less conservative aircraft configurations in the future, allowing for increasingly lighter structures and reduced environmental impact. The present thesis proposes a combined experimental and numerical approach aimed at obtaining reduced-order models for vertical sloshing, to be subsequently integrated into aeroelastic modeling and applications for the assessment of their effects on overall performance. An experimental campaign is first carried out to characterise the nonlinear dissipative behaviour of vertical sloshing for different filling levels. Specifically, a controlled electrodynamic shaker is employed to provide vertical displacement by means of sine-sweep excitation. By exploiting vertical harmonic motion, it is shown how the frequency and amplitude of the imposed excitation significantly influence the dissipative capabilities of the sloshing liquid. The same experiment is used to create a database - with an acquisition phase that considers vertical sloshing as an isolated system - to build a neural-network-based reduced-order model. The dynamics to be modeled is considered as a black box process, leading to the identification of a surrogate model driven only by input/output signals, regardless the knowledge of the internal dynamics. In order to assess the capability of the identified reduced order model for sloshing, the same tank used to generate the training data is mounted at the free end of a cantilever beam to create a new experimental setup in which a fluid-structure interaction scenario is expected. Indeed, this experiment provides experimental data for the validation of the identified dynamic model by comparison with numerical data. The comparison is carried out using a dynamic virtual simulation model corresponding to the experiment, in which the numerical model of the beam interacts with the reduced-order model simulating the sloshing dynamics. Finally, the experimentally validated reduced-order model is used in two different aeroelastic applications - wing prototype and flying wing model - to finally predict the dissipative effects induced by vertical sloshing on the aeroelastic response. Aeroelastic response analyses under pre- and post-critical conditions showed how the vertical sloshing dynamics helps to alleviate the dynamic loads due to severe gusts while providing limit cycle oscillation beyond the flutter margin.

Research products

11573/1706250 - 2024 - Experimental investigations on the sloshing-induced pressure drop in tanks for hydrogen-powered aircraft
Saltari, Francesco; Pizzoli, Marco; Migliorino, Mario Tindaro; Binni, Antonello; Coppotelli, Giuliano; Mastroddi, Franco; Pagliaroli, Tiziano; Del Duchetto, Fabio; Gambioli, Francesco; Abarca, Ramon; Scheufler, Henning - 04b Atto di convegno in volume
conference: AIAA Scitech Forum 2024 (Orlando, Florida, USA)
book: AIAA Scitech Forum 2024 - ()

11573/1693743 - 2023 - Sloshing reduced-order model trained with smoothed particle hydrodynamics simulations
Martinez-Carrascal, Jon; Pizzoli, Marco; Saltari, Francesco; Mastroddi, Franco; Miguel González-Gutiérrez, Leo - 01a Articolo in rivista
paper: NONLINEAR DYNAMICS (Dordrecht: Springer Dordrecht: Kluwer) pp. 21099-21115 - issn: 1573-269X - wos: WOS:001077409500001 (5) - scopus: 2-s2.0-85173126397 (5)

11573/1672748 - 2023 - Neural network-based reduced-order modeling for nonlinear vertical sloshing with experimental validation
Pizzoli, Marco; Saltari, Francesco; Coppotelli, Giuliano; Mastroddi, Franco - 01a Articolo in rivista
paper: NONLINEAR DYNAMICS (Kluwer Academic Publishers:Journals Department, PO Box 322, 3300 AH Dordrecht Netherlands:011 31 78 6576050, EMAIL: frontoffice@wkap.nl, kluweronline@wkap.nl, INTERNET: http://www.kluwerlaw.com, Fax: 011 31 78 6576254) pp. 8913-8933 - issn: 0924-090X - wos: WOS:000945105200001 (5) - scopus: 2-s2.0-85148628606 (6)

11573/1691448 - 2023 - Study of geometrical effects on slosh induced damping
Pizzoli, Marco; Saltari, Francesco; Coppotelli, Giuliano; Mastroddi, Franco - 04b Atto di convegno in volume
conference: AIAA SCITECH 2023 Forum (Gaylord National Harbor, National Harbor (US))
book: AIAA SCITECH 2023 Forum - ()

11573/1620568 - 2022 - Experimental validation of neural-network-based nonlinear reduced-order model for vertical sloshing
Pizzoli, Marco; Saltari, Francesco; Coppotelli, Giuliano; Mastroddi, Franco - 04b Atto di convegno in volume
conference: AIAA Science and technology forum and exposition, AIAA SciTech Forum 2022 (San Diego (CA))
book: AIAA Science and technology forum and exposition, AIAA SciTech Forum 2022- Session: Novel sloshing and other analysis techniques for future flight vehicle certification - (978-1-62410-631-6)

11573/1652605 - 2022 - Linear and nonlinear reduced order models for sloshing for aeroelastic stability and response predictions
Pizzoli, Marco; Saltari, Francesco; Mastroddi, Franco - 01a Articolo in rivista
paper: APPLIED SCIENCES (Basel: MDPI AG, 2011-) pp. - - issn: 2076-3417 - wos: WOS:000852517000001 (1) - scopus: 2-s2.0-85137919740 (2)

11573/1684551 - 2022 - Data driven and model-based vertical sloshing reduced order models for aeroelastic analysis
Saltari, F.; De Courcy, J. J.; Pizzoli, M.; Constantin, L.; Mastroddi, F.; Coppotelli, G.; Titurus, B.; Rendall, T. C. S.; Cooper, J. E.; Gambioli, F. - 04b Atto di convegno in volume
conference: 19th International Forum on Aeroelasticity and Structural Dynamics, IFASD 2022 (Madrid, Spain)
book: Proceedings of the International Forum of Aeroelasticity and Structural Dynamics 2022, IFASD 2022 - (9788409423538)

11573/1620436 - 2022 - Experimental characterisation of sloshing tank dissipative behaviour in vertical harmonic excitation
Saltari, Francesco; Pizzoli, Marco; Coppotelli, Giuliano; Gambioli, Francesco; Cooper, Jonathan E.; Mastroddi, Franco - 01a Articolo in rivista
paper: JOURNAL OF FLUIDS AND STRUCTURES (-Oxford,Oxford: Elsevier Science Limited -London ; Orlando : Academic Press, c1987-) pp. - - issn: 0889-9746 - wos: WOS:000820187100005 (24) - scopus: 2-s2.0-85123256821 (31)

11573/1652604 - 2022 - Sloshing reduced-order model based on neural networks for aeroelastic analyses
Saltari, Francesco; Pizzoli, Marco; Gambioli, Francesco; Jetzschmann, Christina; Mastroddi, Franco - 01a Articolo in rivista
paper: AEROSPACE SCIENCE AND TECHNOLOGY (attuale: ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER, 23 RUE LINOIS, PARIS, FRANCE, 75724 -Dunod Gauthier Villars:15 rue Gossin, 92543 Montrouge France:011 33 1 40926527, 011 33 1 46565266, Fax: 011 33 1 40926597) pp. - - issn: 1270-9638 - wos: WOS:000827266600002 (18) - scopus: 2-s2.0-85133448600 (20)

11573/1620575 - 2022 - Nonlinear sloshing integrated aeroelastic analyses of a research wing prototype
Saltari, Francesco; Pizzoli, Marco; Mastroddi, Franco; Gambioli, Francesco; Jetzschmann, Christina - 04b Atto di convegno in volume
conference: AIAA Science and technology forum and exposition, AIAA SciTech Forum 2022 (San Diego (CA))
book: AIAA Science and technology forum and exposition, AIAA SciTech Forum 2022- Session: Novel sloshing and other analysis techniques for future flight vehicle certification - (978-1-62410-631-6)

11573/1617416 - 2021 - Sloshing reduced-order models for aeroelastic analyses of innovative aircraft configurations
Colella, M.; Saltari, F.; Pizzoli, M.; Mastroddi, F. - 01a Articolo in rivista
paper: AEROSPACE SCIENCE AND TECHNOLOGY (attuale: ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER, 23 RUE LINOIS, PARIS, FRANCE, 75724 -Dunod Gauthier Villars:15 rue Gossin, 92543 Montrouge France:011 33 1 40926527, 011 33 1 46565266, Fax: 011 33 1 40926597) pp. - - issn: 1270-9638 - wos: WOS:000701681000002 (9) - scopus: 2-s2.0-85114801997 (16)

11573/1559787 - 2021 - Nonlinear reduced-order model for vertical sloshing by employing neural networks
Pizzoli, Marco; Saltari, Francesco; Mastroddi, Franco; Martinez-Carrascal, Jon; González-Gutiérrez, Leo M. - 01a Articolo in rivista
paper: NONLINEAR DYNAMICS (Kluwer Academic Publishers:Journals Department, PO Box 322, 3300 AH Dordrecht Netherlands:011 31 78 6576050, EMAIL: frontoffice@wkap.nl, kluweronline@wkap.nl, INTERNET: http://www.kluwerlaw.com, Fax: 011 31 78 6576254) pp. 1469-1478 - issn: 0924-090X - wos: WOS:000669775100002 (19) - scopus: 2-s2.0-85109290603 (22)

11573/1493210 - 2020 - Investigation of sloshing effects on flexible aircraft stability and response
Pizzoli, Marco - 01a Articolo in rivista
paper: AEROTECNICA MISSILI E SPAZIO ([Cham]: Springer International Publishing Milano: Tamburini Rome Italy-Pisa: Associazione Italiana di Aeronautica e Astronautica) pp. 297-308 - issn: 0365-7442 - wos: (0) - scopus: (0)

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