Dynamic analysis of the load hoisting process

• Autorzy: Grabski J. , Strzałko J.

Warianty tytułu

PL

Analiza dynamiki procesu podnoszenia ładunku

• Języki publikacji: EN

Abstrakty

EN

Proposals of two models of a load lifted by cranes have been discussed. Special attention has been paid to the phenomena occuring before detachment of the load from the ground. Stick-slip motion of the load on the foundation has been observed. One of two models presented - the model in the form of a rigid body resting on an elastic foundation has turned out to be more advantageous for the analysis of the lifting process. The results of numerical computations have revealed a phenomenon of solution bifurcation that occurs at a slight change in values of parameters of the model.

PL

W pracy zostały omówione propozycje modeli przeznaczonych do wykorzystania w analizie dynamiki ładunku podwieszonego przez dźwignice. Szczególna uwaga została zwrócona na zjawiska zachodzące przed oderwaniem ładunku od podłoża. Spośród dwóch przedstawionych modeli ładunku bardziej przydatny do analizy procesu podnoszenia okazał się model w postaci sztywnej bryły i sprężystego podłoża. Wyniki otrzymane z przeprowadzonych obliczeń numerycznych ujawniły zjawisko bifurkacji rozwiazania przy niewielkiej zmianie wartości parametrów modelu.

Słowa kluczowe

EN

cranes; 3D model of load; dynamics of lifted load; load hoisting

• Wydawca: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
• Czasopismo: Journal of Theoretical and Applied Mechanics
• Rocznik: 2003
• Tom: Vol. 41 nr 4
• Strony: 853--872
• Opis fizyczny: Bibliogr. 16 poz., rys.

Twórcy

autor

Grabski J.

• Faculty of Mechanical Engineering, Technical University of Łódź

autor

Strzałko J.

• Faculty of Mechanical Engineering, Technical University of Łódź

Bibliografia

• 1. Borkowski W., Konopka S., Prochowski L., 1996, Dynamika Maszyn Roboczych, WNT Warszawa
• 2. Grabski J., 1998, Analysis of engineering machine dynamics using matrix methods, Scientific Bulletin of TUL, 804 (in Polish)
• 3. Grabski J., Strzałko J., 1997, Automatic generation of Boltzmann symbols for mechanical problems, Mechanics and Mechanical Engineering, 1, 1, 61-77
• 4. Hakala I., Sorsa T., 1998, Sway Prevention in RTG Cranes, Koncranes’World (http://www.kcinet.com/kciworld/spring1998)
• 5. Jedliński W., Grzesikiewicz W., 1990, Dynamics of working elements of engineering machines, including control, shown on the example of a telescopic crane, Reports of the Central Programme of Fundamental Investigations 02.05, Warsaw Technical University, Warsaw (in Polish)
• 6. Konderla P., 1993, A Contact problem approach for heterogeneous body by boundary element method, XI Polish Conference on Computer Methods in Mechanics, 1, 441-448
• 7. Kurnik W., 1997, Divergent and Oscillating Bifurcation, WNT, Warsaw (in Polish)
• 8. Lee H.H., 1998, Modeling and control of a three-dimensional overhead crane, ASME J. Dyn. Systems Meas. Control, 120, 471-476
• 9. Maczyński A., Kościelny R., 1999, A dynamic model to optimisation working motions of a mobile crane, Proc. Tenth World Congress on the Theory of Machines and Mechanisms, Oulu, Finland
• 10. Miyata N. et al., 2001, Development of feedforward anti-sway control for highly efficient and safety crane operation, Mitsubishi Heavy Industries, Ltd. Technical Review, 38, 2, 73-77
• 11. Strzałko J., 1998, Energy criterion of correctness of equations of motion and verification of their solutions in machine dynamics issues, Scentific Bulletin of TUL, 795 (in Polish)
• 12. Strzałko J., Grabski J., 1995, Dynamic analysis of a machine model with time-varying mass, Acta Mechanica, 112, 173-186
• 13. Strzałko J., Grabski J., 1998, Computer simulation of the load lifting and transporting process, XI Conference on Problems in Development in Engineering Machines, 327-334 (in Polish)
• 14. Tomczyk J., Cink J., 1999, The optimisation of the flexibly suspended loads transport by microprocessor controlled overhead cranes, Proc. Conference OPTI’99, Orlando, Florida, USA
• 15. Wojnarowski J., Oziemski S., Nowak A., 1990, Modelling of reflection phenomenon during the bridge crane drive, Reports of the Central Programme of Fundamental Investigations 02.05, Warsaw Technical University, Warsaw (in Polish)
• 16. Wriggers P., Zavarise G., 1993, Recent trends in computational methods for contact problems, XI Polish Conference on Computer Methods in Mechanics, 127-148