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Stability assessment as a criterion of stabilization of the movement trajectory of mobile crane working elements

Kacalak W., Budniak Z., Majewski M.

International Journal of Applied Mechanics and Engineering

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2018

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Vol. 23, no. 1

65--77

EN

The article presents a stability assessment method of the mobile crane handling system based on the safety indicator values that were accepted as the trajectory optimization criterion. With the use of the mathematical model built and the model built in the integrated CAD/CAE environment, analyses were conducted of the displacements of the mass centre of the crane system, reactions of the outrigger system, stabilizing and overturning torques that act on the crane as well as the safety indicator values for the given movement trajectories of the crane working elements.

2

Crane stability assessment method in the operating cycle

Kacalak W., Budniak Z., Majewski M.

Transport Problems

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2017

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T. 12, z. 4

141--151

EN

The article presents stability assessment of the mobile crane handling system based on the developed method with the use of the mathematical model built and the model built in the integrated CAD/CAE environment. The model proposed consists of the main crane assemblies coupled together: the truck with outrigger system and the base, the slewing column, the inner and outer arms, the six-member telescopic boom, the hook with lifting sling and the transported load. Analyses were conducted of the displacements of the mass centre of the crane system, reactions of the outrigger system, stabilizing and overturning torques that act on the crane as well as the safety indicator values for the given movement trajectories of the crane working elements.

3

Sterowanie modelem żurawia samochodowego z zapewnieniem jego stateczności

Janusz J., Kłosiński J.

Logistyka

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2014

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nr 3

2539--2547

PL

W przypadku przenoszenia dużych ładunków przez żurawie samochodowe istnieje możliwość utraty stateczności maszyny pod wpływem działania dużych sił bezwładności mimo tego, że w chwili rozpoczęcia ruchu były spełnione warunki stateczności żurawia. Monitorowanie wartości sił nacisku układu podporowego na podłoże oraz ich zmian stwarza szanse odpowiednio wcześniejszej korekty strategii sterowania ruchami roboczymi, która uchroni żuraw przed utratą stateczności. W pracy zamieszczono wyniki badań numerycznych modeli sterowania i regulacji ruchów roboczych żurawia zapewniających minimalizację wahań ładunku po zakończeniu ruchu wyposażonych w interwencyjny układ zapobiegający utracie stateczności.

EN

In case of transport of great loads by mobile cranes the loss of stability of machine is possible by reason of acting the great forces of inertia. It can appear also at the time when the conditions of crane stability were fulfilled in moment of beginning of motion. Monitoring of the values of the pressure forces of the crane support system which act on the ground as well as their changes makes possible the application of special device to correction the crane motions controlling. It protects the crane against the loss of stability. The results of numerical simulations of the models of the crane motions controlling systems with assuring minimization of the load swings in the end point of the slewing motion and with the additional system preventing the loss of stability have been presented in the paper.