Identification of modular firefighting superstructures' dynamic behaviour
Apstrakt
Specific functional requirements for firefighting vehicles have resulted in stricter exploitation regimes and frequent off-road use. Current practice appoints the problem of the strength of a superstructure's modules, which are very different in terms of torsional rigidity. It is important to say here that there are no unambiguous manufacturer's guidelines for bodybuilders to complete a firefighting vehicle. In such circumstances, the identification of the dynamic behaviour of modular firefighting superstructures further gains in importance. Developed numerical-experimental approach for identification, analysis and optimisation of the dynamic behaviour of modular firefighting vehicle superstructures is shown. Experimental part of this method is based on excitation of superstructure physical models with, for this purpose specially developed mechanical exciter. Also, natural frequencies of structures, important in terms of resonant zones, are obtained using bump test and FFT analysis. Fi...nite elements method is defined as a diagnostic tool for the identification of structure behaviour, and the measured acceleration values at characteristic points as a proof of the model's correctness i. e. correctness of the applied optimisation approach. The numerical analysis of influence of suspension characteristics and connections of superstructure modules on their dynamic behaviour (eigen-frequencies and amplitudes) are also presented. Comparative analysis of the experimental and numerical results verified the numerical model. Such a model can save the time and money by reducing the experiments needed in the modular firefighting vehicle superstructures optimisation.
Ključne reči:
vibration / simulation / modular firefighting superstructures / exciter / dynamic characteristicsIzvor:
Journal of Vibroengineering, 2016, 18, 1, 324-333Izdavač:
- Vibromechanika
Finansiranje / projekti:
- Naučno-tehnološka podrška unapređenju bezbednosti specijalnih drumskih i šinskih vozila (RS-MESTD-Technological Development (TD or TR)-35045)
- Razvoj savremenih metoda dijagnostike i ispitivanja mašinskih struktura (RS-MESTD-Technological Development (TD or TR)-35040)
- Unapređenje tehnologije površinske eksploatacije lignita u cilju povećanja energetske efikasnosti, sigurnosti i zaštite na radu (RS-MESTD-Technological Development (TD or TR)-33039)
Institucija/grupa
Inovacioni centarTY - JOUR AU - Rakićević, Branislav AU - Mitić, Saša AU - Jovančić, Predrag AU - Ignjatović, Dragan AU - Maneski, Taško PY - 2016 UR - https://machinery.mas.bg.ac.rs/handle/123456789/2400 AB - Specific functional requirements for firefighting vehicles have resulted in stricter exploitation regimes and frequent off-road use. Current practice appoints the problem of the strength of a superstructure's modules, which are very different in terms of torsional rigidity. It is important to say here that there are no unambiguous manufacturer's guidelines for bodybuilders to complete a firefighting vehicle. In such circumstances, the identification of the dynamic behaviour of modular firefighting superstructures further gains in importance. Developed numerical-experimental approach for identification, analysis and optimisation of the dynamic behaviour of modular firefighting vehicle superstructures is shown. Experimental part of this method is based on excitation of superstructure physical models with, for this purpose specially developed mechanical exciter. Also, natural frequencies of structures, important in terms of resonant zones, are obtained using bump test and FFT analysis. Finite elements method is defined as a diagnostic tool for the identification of structure behaviour, and the measured acceleration values at characteristic points as a proof of the model's correctness i. e. correctness of the applied optimisation approach. The numerical analysis of influence of suspension characteristics and connections of superstructure modules on their dynamic behaviour (eigen-frequencies and amplitudes) are also presented. Comparative analysis of the experimental and numerical results verified the numerical model. Such a model can save the time and money by reducing the experiments needed in the modular firefighting vehicle superstructures optimisation. PB - Vibromechanika T2 - Journal of Vibroengineering T1 - Identification of modular firefighting superstructures' dynamic behaviour EP - 333 IS - 1 SP - 324 VL - 18 UR - https://hdl.handle.net/21.15107/rcub_machinery_2400 ER -
@article{ author = "Rakićević, Branislav and Mitić, Saša and Jovančić, Predrag and Ignjatović, Dragan and Maneski, Taško", year = "2016", abstract = "Specific functional requirements for firefighting vehicles have resulted in stricter exploitation regimes and frequent off-road use. Current practice appoints the problem of the strength of a superstructure's modules, which are very different in terms of torsional rigidity. It is important to say here that there are no unambiguous manufacturer's guidelines for bodybuilders to complete a firefighting vehicle. In such circumstances, the identification of the dynamic behaviour of modular firefighting superstructures further gains in importance. Developed numerical-experimental approach for identification, analysis and optimisation of the dynamic behaviour of modular firefighting vehicle superstructures is shown. Experimental part of this method is based on excitation of superstructure physical models with, for this purpose specially developed mechanical exciter. Also, natural frequencies of structures, important in terms of resonant zones, are obtained using bump test and FFT analysis. Finite elements method is defined as a diagnostic tool for the identification of structure behaviour, and the measured acceleration values at characteristic points as a proof of the model's correctness i. e. correctness of the applied optimisation approach. The numerical analysis of influence of suspension characteristics and connections of superstructure modules on their dynamic behaviour (eigen-frequencies and amplitudes) are also presented. Comparative analysis of the experimental and numerical results verified the numerical model. Such a model can save the time and money by reducing the experiments needed in the modular firefighting vehicle superstructures optimisation.", publisher = "Vibromechanika", journal = "Journal of Vibroengineering", title = "Identification of modular firefighting superstructures' dynamic behaviour", pages = "333-324", number = "1", volume = "18", url = "https://hdl.handle.net/21.15107/rcub_machinery_2400" }
Rakićević, B., Mitić, S., Jovančić, P., Ignjatović, D.,& Maneski, T.. (2016). Identification of modular firefighting superstructures' dynamic behaviour. in Journal of Vibroengineering Vibromechanika., 18(1), 324-333. https://hdl.handle.net/21.15107/rcub_machinery_2400
Rakićević B, Mitić S, Jovančić P, Ignjatović D, Maneski T. Identification of modular firefighting superstructures' dynamic behaviour. in Journal of Vibroengineering. 2016;18(1):324-333. https://hdl.handle.net/21.15107/rcub_machinery_2400 .
Rakićević, Branislav, Mitić, Saša, Jovančić, Predrag, Ignjatović, Dragan, Maneski, Taško, "Identification of modular firefighting superstructures' dynamic behaviour" in Journal of Vibroengineering, 18, no. 1 (2016):324-333, https://hdl.handle.net/21.15107/rcub_machinery_2400 .