Experimental Assessment of Time-Limited Operation and Rectification of a Bridge Crane

Frankovský, Peter; Delyová, Ingrid; Sivák, Peter; Kuryło, Piotr; Pivarčiová, Elena; Neumann, Vojtech

doi:10.3390/ma13122708

Cited by 8 publications

(10 citation statements)

References 24 publications

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“…Despite the improvement in the structural forms of crane metallic structures, the stresses that arise in them when hoisting, lowering, and moving cargo on the crane bridge by a cargo trolley [9,10] lead to defects in the structure of the metal [11,12]. These defects are found in the form of bends, microcracks, and cracks in the metallic structure of an overhead crane [13].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…And, according to the authors, further research would be carried out using that laboratory model. Our analysis of the literary sources [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] has revealed a lack of data on reducing the dynamic loads during the operation of the mechanisms that move an overhead crane through the improved design of the running wheel.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

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Determining stresses in the metallic structure of an overhead crane when using running wheels of the new design

Fidrovska

Slepuzhnikov

Варченко

et al. 2021

EEJET

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This paper proposes a method to experimentally study the stressed state of the metallic structure of an overhead crane when using running wheels of different designs. The study employed a functioning electric, supporting, double-girder overhead crane with a capacity of 5 tons and a run of 22.5 m. Strain gauges assembled in a semi-bridge circuit and connected to the analog-digital converter Zetlab210 (Russia) were used to determine the girder deformations at the time of hoisting and moving cargoes of different masses. The cargo was lifted and displaced under the same conditions, on the regular wheels of a cargo trolley and the wheels with an elastic rubber insert. The girder deformation diagrams were constructed. The subsequent recalculation produced the stressed state's dependences at each point of cargo movement when using both regular wheels and the wheels with an elastic rubber insert. Also established were the dependences and the duration of oscillations that occur over the cycle of cargo lifting and moving. The experimental study cycle included cargo lifting in the far-left position by a trolley, moving the cargo to the far-right position, and returning the trolley with the cargo to its original position. It should be noted that the application of a new, modernized design of the running wheels of a cargo trolley with an elastic rubber insert effectively dampen the oscillations in the metallic structure of the crane. The experimental study's results helped establish an 18 % reduction in stresses in the girder of the overhead crane, as well as a decrease in peak vibrations, by 20 seconds, at the same cycles of cargo hoisting and moving. In addition, using wheels with an elastic rubber insert reduces the period of oscillation damping at the end of the cycle of cargo movement, by at least 30 %.

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Section: Literature Review and Problem Statementmentioning

confidence: 99%

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Determining stresses in the metallic structure of an overhead crane when using running wheels of the new design

Fidrovska

Slepuzhnikov

Варченко

et al. 2021

EEJET

View full text Add to dashboard Cite

show abstract

“…The last relation shows that in the incremental theory of plasticity, the rate (increment) of plastic deformation

is expressed as a function of instantaneous stress, strain rate and stress rate [ 40 , 41 , 42 , 43 , 44 , 45 ]:

…”

Section: An Analytical Description Of Elastic–plastic Materials Behmentioning

confidence: 99%

“…The internal control variable is the kinematic stress tensor α which defines the actual position of the center of the plasticity area and it is related to the internal stress. Then, in purely kinematic hardening, the plasticity condition is expressed in the form of [ 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 ]:

…”

Section: An Analytical Description Of Elastic–plastic Materials Behmentioning

confidence: 99%

Influence of Different Strain Hardening Models on the Behavior of Materials in the Elastic–Plastic Regime under Cyclic Loading

et al. 2020

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In exact analyses of bodies in the elastic–plastic regime, the behavior of the material above critical stress values plays a key role. In addition, under cyclic stress, important phenomena to be taken into account are the various types of hardening and the design of the material or structure. In this process, it is important to define several groups of characteristics. These include, for instance, the initial area of plasticity or load which defines the interface between elastic and plastic deformation area. The characteristics also include the relevant law of plastic deformation which specifies the velocity direction of plastic deformation during plastic deformation. In the hardening condition, it is also important to determine the position, size and shape of the subsequent loading area. The elasto-plastic theory was used for the analysis of special compliant mechanisms that are applied for positioning of extremely precise members of the Compact Linear Collider (CLIC), e.g., cryomagnets, laser equipment, etc. Different types of deformation hardening were used to simulate the behavior of particular structural elements in the elastic–plastic regime. Obtained values of stresses and deformations may be used in further practical applications or as default values in other strain hardening model simulations.

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“…Some studies for the optimization of truss structures consider discrete cross-sectional areas [16][17][18][19][20]. Tiachacht et al [21] have used a methodology for identifying and quantifying damage in two-dimensional and three-dimensional structures based on a combination of a modified Cornwell indicator and a genetic algorithm.…”

Section: Introductionmentioning

confidence: 99%

Sizing and Topology Optimization of Trusses Using Genetic Algorithm

et al. 2021

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Genetic algorithms are a robust method for a solution of wide variety optimization problems. It explores a big space of design variables in order to find the best solution. From the point of view of a user, the algorithm requires the encoding of design variables into the form of strings and the procedure of optimization uses them for optimization. Here, for the structural engineer, it is crucial to find the form of objective function including the constraints of the task and also to avoid critical states during the solution of structural responses. This paper presents the use of genetic algorithm for solving truss structures. The use of genetic algorithm approach is shown on three cases of truss structures.

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Experimental Assessment of Time-Limited Operation and Rectification of a Bridge Crane

Cited by 8 publications

References 24 publications

Determining stresses in the metallic structure of an overhead crane when using running wheels of the new design

Determining stresses in the metallic structure of an overhead crane when using running wheels of the new design

Influence of Different Strain Hardening Models on the Behavior of Materials in the Elastic–Plastic Regime under Cyclic Loading

Sizing and Topology Optimization of Trusses Using Genetic Algorithm

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