Abstract
LUPOS is a parametric FEM code developed in MATLAB aiming to merge different simulative characteristics: to provide a complete open-source 3D FEM code suitable for analysing elements formulations, assembly approaches, reduction techniques in a complete parametric scheme; to allow parametric analyses and integrating results, giving all matrices details and formulations; to integrate this parametric FEM code in Multi-Body and nonlinear integration processes in time domain such as Simulink.
The acronym of LUPOS in Italian-English Lupo’s, or better in Latin lupus, lupi, is associable to the wolf, symbol of smart and aggressive animal. What better name could be chosen?
The reason to develop another software for dynamics relies in the main idea to share concepts about mechanical modelling and simulation tools that can be applied from academic examples to industrial applications in an intuitive and easy way, but maintaining all the mathematical rigour and numerical explanations, in particular taking into account parameters that can extend to families of structures.
Some examples of different levels of complexities are analysed for static, real and complex modal analyses and finally in rotordynamics in both time and frequency domains.
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Change history
05 April 2024
A correction has been published.
References
Guyan, R.J.: Reduction of stiffness and mass matrices. AIAA J. 3(2), 380 (1965)
O’Callahan, J., Avitabile, P., Riemer, R.: System equivalent reduction expansion process (SEREP). In: Proceedings of the 7th IMAC, A Conference and Exposition on Structural Dynamics, Las Vegas, Nevada, USA, pp. 29–37 (1989)
Craig, R.R., Bampton, M.C.C.: Coupling of substructures for dynamic analyses. AIAA J. 6(7), 1313–1319 (1968)
Bonisoli, E.: Lupos: LUmped Parameters Open Source FEM code, Politecnico di Torino, Department of Mechanical and Aerospace Engineering, Tutorial v. 2022-09-16
Allemang, R.J., Brown, D.L.: A correlation coefficient for modal vector analysis. In: Proceedings of the 1st IMAC, A Conference and Exposition on Structural Dynamics, Orlando, Florida, USA, pp. 110–116 (1982)
Allemang, R.J.: The modal assurance criterion - twenty years of use and abuse. Sound Vib. 37(8), 14–21 (2003)
Vacher, P., Jacquier, B., Bucharles, A.: Extensions of the MAC criterion to complex modes. In: International Conference on Noise and Vibration Engineering ISMA2010, Leuven, Belgium, pp. 2713–2725 (2010)
Bonisoli, E., Lisitano, D., Vigliani, A.: Damping identification and localisation via Layer Method: experimental application to a vehicle chassis focused on shock absorbers effects. Mech. Syst. Signal Process. 116, 194–216 (2019). https://doi.org/10.1016/j.ymssp.2018.06.013
Lisitano, D., Bonisoli, E., Recchiuto, C.T., Muscolo, G.G.: Dynamic balance of the head in a flexible legged robot for efficient biped locomotion. MDPI Appl. Sci. 11(7), 1–19 (2021). https://doi.org/10.3390/app11072945
Tota, A., Dimauro, L., Velardocchia, F., Paciullo, G., Velardocchia, M.: An intelligent predictive algorithm for the anti-rollover prevention of heavy vehicles for off-road applications. Mach. Des. 10, 835 (2022). https://doi.org/10.3390/machines10100835, pp. 1-23
Bonisoli, E., Delprete, C., Esposito, M., Mottershead, J.E.: Chapter 29: Structural dynamics with coincident eigenvalues: modelling and testing. In: Modal Analysis Topics, vol. 3, Proceedings of the 29th IMAC, A Conference and Exposition on Structural Dynamics, Conference Proceedings of the Society for Experimental Mechanics Series 2011, 578 pp, pp. 325–337. Springer (2011). https://doi.org/10.1007/978-1-4419-9299-4_29
Bonisoli, E., Brino, M., Delprete, C.: Numerical-experimental comparison of a parametric test-rig for crossing and veering phenomena. Mech. Syst. Signal Process. 128, 369–388 (2019). https://doi.org/10.1016/j.ymssp.2019.03.039
Bonisoli, E., Marcuccio, G., Rosso, C.: Chapter 18: Crossing and veering phenomena in crank mechanism dynamics. In: Topics in Model Validation and Uncertainty Quantification, vol. 5, Proceedings of the 31st IMAC, A Conference and Exposition on Structural Dynamics, Conference Proceedings of the Society for Experimental Mechanics Series 2013, 264 pp, pp. 175–187. Springer (2013). https://doi.org/10.1007/978-1-4614-6564-5_18
Bonisoli, E., Rosso, C., Simeone, L.: Experimental investigation and validation of dynamic variabilities of a crank mechanism. In: Proceedings of the International Conference on Structural Engineering Dynamics ICEDyn2017, 3–5 July, pp. 1–10 (2017, Ericeira, Portugal, Paper 85)
Varoto, P.S., Bonisoli, E., Lisitano, D.: Chapter 10: Parametric analysis and voltage generation performance of a multi-directional MDOF piezoelastic vibration energy harvester, In: Sensors and Instrumentation, Aircraft/Aerospace, Energy Harvesting & Dynamic Environments Testing, vol. 7, Proceedings of the 38th IMAC, A Conference and Exposition on Structural Dynamics 2020, Conference Proceedings of the Society for Experimental Mechanics Series, 278 pp, pp. 85–95, Springer (2021). https://doi.org/10.1007/978-3-030-47713-4_10
Bonisoli, E., Lisitano, D., Dimauro, L., Peroni, L.: Chapter 14: A proposal of dynamic behaviour design based on mode shape tracing: numerical application to a motorbike frame. In: Dynamic Substructures, vol. 4, Proceedings of the 37th IMAC, A Conference and Exposition on Structural Dynamics 2019, Conference Proceedings of the Society for Experimental Mechanics Series, 186 pp, pp. 149–158. Springer (2020). https://doi.org/10.1007/978-3-030-12184-6_14
Bonisoli, E., Lisitano, D., Dimauro, L.: Experimental and numerical mode shape tracing from components to whole motorbike chassis. In: International Conference on Noise and Vibration Engineering ISMA2018, September 17–19, 2018, Leuven, Belgium, pp. 3597–3604 (2018)
Bonisoli, E., Lisitano, D., Dimauro, L.: Detection of critical mode-shapes in flexible multibody systems dynamics: the case study of a racing motorcycle. Mech. Syst. Signal Process. 180, 1–23 (2022, 109370). https://doi.org/10.1016/j.ymssp.2022.109370
Bonisoli, E., Dimauro, L., Venturini, S., Peroni, L.: Assembling uncertainty effects on the dynamic response of nominally identical motorbike components. In: Proceedings of the 41st IMAC, A Conference and Exposition on Structural Dynamics 2023, Conference Proceedings of the Society for Experimental Mechanics Series, pp. 1–11. https://doi.org/10.1007/978-3-031-37003-8_32
Bonisoli, E., Vella, A.D., Venturini, S.: Chapter 13: Uncertainty effects on bike spoke wheel modal behaviour. In: Model Validation and Uncertainty Quantification, vol. 3, Proceedings of the 40th IMAC, A Conference and Exposition on Structural Dynamics 2022, Conference Proceedings of the Society for Experimental Mechanics Series, 150 pp, pp. 111–123. Springer (2023). https://doi.org/10.1007/978-3-031-04090-0_13
Bonisoli, E., Casazza, M., Lisitano, D., Dimauro, L.: Chapter 21: Parametric experimental modal analysis of a modern violin based on a Guarneri del Gesù model. In: Rotating Machinery, Vibro-Acoustics & Laser Vibrometry, vol. 7, Proceedings of the 36th IMAC, A Conference and Exposition on Structural Dynamics, Conference Proceedings of the Society for Experimental Mechanics Series 2018, 244 pp, pp. 219–230. Springer (2019). https://doi.org/10.1007/978-3-319-74693-7_21
Bonisoli, E., Casazza, M., Lisitano, D., Averame, S., Masoero, M.C., Shtrepi, L.: Chapter 15: Localisation of sonic sources on a contemporary violin made on a Guarneri del Gesù model. In: Sensors and Instrumentation, Aircraft/Aerospace and Dynamic Environments Testing, vol. 7, Proceedings of the 40th IMAC, A Conference and Exposition on Structural Dynamics 2022, Conference Proceedings of the Society for Experimental Mechanics Series, 179 pp, pp. 171–179. Springer (2023). https://doi.org/10.1007/978-3-031-05415-0_15
Iuso, G., Virone, G., Cafiero, G., Bonisoli, E., Lisitano, D., Venturini, S.: Aeroelastic-structural coupling in antenna prototype for windy open-space. In: 8th International Conference on Computational Methods for Coupled Problems in Science and Engineering, Coupled Problems 2019, June 3–5, 2019, Sitges, Barcelona, Spain, pp. 481–492 (2019)
Bonisoli, E., Amabili, M.: Complex modal analyses for human cardiovascular system. In: International Conference on Nonlinear Solid Mechanics, ICoNSoM 2022, June 13–16, 2022, Alghero, Italy, Mini-Symposium MS-9 Unusual Dynamics and Active Control (2022)
Bonisoli, E., Scapolan, M.: Chapter 11: A proposal of multi-dimensional modal reduction for nonlinear dynamic simulations. In: Nonlinear Dynamics, vol. 1, Proceedings of the 35th IMAC, A Conference and Exposition on Structural Dynamics, Conference Proceedings of the Society for Experimental Mechanics Series 2017, 221 pp, pp. 107–114. Springer (2017). https://doi.org/10.1007/978-3-319-54404-5_11
Bonisoli, E., Lisitano, D., Conigliaro, C.: Chapter 38: Experimental-numerical comparison of contact nonlinear dynamics through multi-level linear mode shapes. In: Nonlinear Structures and Systems, vol. 1, Proceedings of the 37th IMAC, A Conference and Exposition on Structural Dynamics 2019, Conference Proceedings of the Society for Experimental Mechanics Series, 277 pp, pp. 263–271. Springer (2020). https://doi.org/10.1007/978-3-030-12391-8_38
Lisitano, D., Bonisoli, E.: Direct identification of nonlinear damping: application to a magnetic damped system. Mech. Syst. Signal Process. 146, 107038–107056 (2021). https://doi.org/10.1016/j.ymssp.2020.107038
Bonisoli, E., Delprete, C., Freschi, F., Lisitano, D., Repetto, M.: Modelling of nonlinear magnetic damping in vibrating coupled structures. In: 2019 22nd International Conference on the Computation of Electromagnetic Fields (COMPUMAG), pp. 1–4, Paris (2019). https://doi.org/10.1109/COMPUMAG45669.2019.9032833
Bonisoli, E., Venturini, S., Cavallaro, S.P.: Nonlinear characterisation of a rotor on passive magnetic bearings. Int. J. Mech. Control. 23(1), 121–128 (2022)
Acknowledgements
The authors fully acknowledge all support received during years of developments and discussions on LUPOS topics from several MSc and PhD students of the Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Italy.
In particular, we thank the main contributions of Gabriele Marcuccio, Marco Brino and Domenico Lisitano.
For the latest software release and for having details, please contact elvio.bonisoli@polito.it
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Bonisoli, E., Dimauro, L., Venturini, S. (2023). LUPOS: Open-Source Scientific Computing in Structural Dynamics. In: Madarshahian, R., Hemez, F. (eds) Data Science in Engineering, Volume 10. SEM 2023. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-031-34946-1_23
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DOI: https://doi.org/10.1007/978-3-031-34946-1_23
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