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Maczyński, Andrzej; Wojciech, Stanisław

doi:10.1023/a:1024480318414

Cited by 36 publications

(3 citation statements)

References 15 publications

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“…q (J) m T -vector of the generalised coordinates of the jib, q (L) = x L y L z L T -vector of the generalised coordinates of the load, ϕ -rotation angle of the crane's pedestal (upper structure) -slewing angle, ψ -inclination angle of the undeformed jib, α -rotation angle of the hoisting winch's drum. Relationships which determine individual terms of the Lagrange's equations are obtained in analogy to the case of a mobile crane considered in [10]. Of particular interest is modelling the jib with the modal method described there.…”

Section: Described Latermentioning

confidence: 99%

Archive of Mechanical Engineering

Maczyński,

Wojciech

2020

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The peculiarity of offshore cranes, i. e. cranes based on ships or drilling platforms, is not only a significant motion of their base, but also the taut-slack phenomenon. Under some circumstances a rope can temporarily go completely slack, while a moment later, the force in the rope can increase to nominal or even higher value. Periodic occurrence of such phenomena can be damaging to the supporting structure of the crane and its driver. In the paper, mathematical models of offshore cranes that allow for analysis of the taut-slack phenomenon are presented. Results of numerical calculations show that the method of load stabilization proposed by the authors in their earlier works can eliminate this problem.

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Section: Described Latermentioning

confidence: 99%

Archive of Mechanical Engineering

Maczyński,

Wojciech

2020

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“…Computer modeling intended for decision of the diversified problems are receiving more and more propagation [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Wide use of computer modeling especially at the earliest stages of products, processes and systems creation allow to reduce in many times huge losses at the next stages of cycle life.…”

Section: Introductionmentioning

confidence: 99%

Computer modeling influence lines of the bridge crane rods load truss in Mathcad system

2021

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Article describes modeling processes influencing the lines in rods load truss of the bridge crane in Mathcad system: for the rods of the top belt of a truss; for the rods of the bottom belt of a truss; for diagonal and vertical rods of a truss at various section of the load truss; algorithm and a program complex for automation of modeling and graphical representation influence lines and maximum their values. The proposed modeling procedures of the influence lines in any section of a load truss make it possible to reduce time and cost for these calculations’ performance at least in ten times and to carry out the research on load truss parameters, rods parameters and materials change effectively.

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“…The presented models are mostly defined with the purpose of obtaining results taking into account the dynamic behaviour of one or several assembles of the truck-crane (Mijajlović et al 2000;Šelmić 1979;Jerman et al 2004;Maczynski, Wojciech 2003;Šelmić, Mijailović 1998;Mijailović, Šelmić 2002a;Posiadał 1997;Towarek 1998;Volkov et al 2000;Dubowsky et al 1991). In this way, a certain number of parameters having a significant influence on the dynamic behaviour of the truck-crane have been ignored.…”

Section: Introductionmentioning

confidence: 99%

Modelling the Dynamic Behaviour of the Truck-Crane

Mijailović

2012

Transport

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The paper deals with the problem of a dynamic analysis of truck-cranes. Therefore, the article has developed a mechanical-mathematical model having 18 generalized coordinates. Depending on the type of truck crane operation as well as on the fact whether the aim of the article is to conduct the dynamic analysis of the whole truck crane or only that of one of its components, simpler mechanical models are also offered. The presented model is more realistic than those describing the dynamic behaviour of the truck-crane performing all necessary functions, i.e. a mobile means of lifting, transportation and reloading.

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Cited by 36 publications

References 15 publications

Archive of Mechanical Engineering

Archive of Mechanical Engineering

Computer modeling influence lines of the bridge crane rods load truss in Mathcad system

Modelling the Dynamic Behaviour of the Truck-Crane

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