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High-speed tracked vehicle model order reduction for static and dynamic simulations

Defence Technology（防务技术） 2024年第8期38卷 89-110页

作者： Luca Dimauro Simone Venturini Antonio Tota enrico galvagno Mauro Velardocchia Department of Mechanical and Aerospace Engineering Politecnico di TorinoCorso Duca degli Abruzzi2410129TorinoItaly

In this paper, a model order reduction strategy is adopted for the static and dynamic behaviour simulation of a high-speed tracked vehicle. The total number of degree of freedom of the structure is condensed through a selection of interface degrees of freedom and significant global mode shapes, for an approximated description of vehicle dynamic behaviour. The methodology is implemented in a customised open-source software to reduce the computational efforts. The modelled tracked vehicle includes the sprung mass, the unsprung masses, connected by means of torsional bars, and all the track assemblies, composing the track chain. The proposed research activity presents a comprehensive investigation of the influence of the track chain, combined with longitudinal vehicle speed, on statics and vehicle dynamics, focusing on vertical dynamics. The vehicle response has been investigated both in frequency and time domain. In this last case road-wheel displacements are assumed as inputs for the model, under different working conditions, hence considering several road profiles with different amplitudes and characteristic excitation frequencies. Simulation results have proven a high fidelity in model order reduction approach and a significant contribution of the track chain in the global dynamic behaviour of the tracked vehicle.

关键词： Tracked vehicle dynamics Rubber characteristics Component mode synthesis Modal analysis Open-source

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Sintering and mechanical properties of β-SiC powder obtained from waste tires

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Journal of Advanced Ceramics 2016年第1期5卷 40-46页

作者： G.MAGNANI S.galvagno G.SICO S.PORTOFINO C.FREDA E.BURRESI ENEA SSPT-PROMAS-TEMAF Faenza Research Laboratories Via Ravegnana 186 48018 Faenza(RA) Italy ENEA SSPT-PROMAS-NANO Portici Research Center P.le Enrico Fermi 1 80055 Portici(NA) Italy ENEA SSPT-PROMAS-MATAS Brindisi Research Center S.S.7 Appia km 70600 72100 Brindisi Italy

Plasma synthesized SiC powder obtained from quartz and carbonaceous residue of waste tires was successfully sintered at 1925 ℃ by pressureless liquid-phase method using yttria and alumina as sintering aids (T-SiC). Comparison with sintered SiC obtained from commercial powder (C-SiC) put in evidence of similar sintered density (98%T.D.), but much finer microstructure of T-SiC than that of C-SiC. T-SiC also showed higher flexural strength than C-SiC both at room temperature (508 vs. 458 MPa) and at 1500 ℃ (280 vs. 171 MPa). Difference in liquid phase was responsible for the differences in hardness and fracture toughness. The high value of the Young’s modulus of T-SiC (427 MPa) confirmed the high degree of sinterability of this powder and that it can be a promising candidate for structural applications with high added value.

关键词： sintering mechanical properties SiC structural application

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