REDUCING DYNAMIC LOADS DURING BRAKING BRIDGE CRANE BY OPTIMIZING THE MECHANICAL CHARACTERISTICS OF THE ELECTRIC DRIVE
DOI:
https://doi.org/10.20535/2305-9001.2015.75.59249Keywords:
bridge crane, mechanism of movement, dynamic braking, mechanical characteristics, optimization, dynamic loads, generalized criterionAbstract
The problems of reducing the dynamic loads during braking bridge crane. The method and results of optimization mechanical characteristics of drive movement of the bridge crane in the dynamic braking mode are expounded. The optimization algorithm of the mechanical characteristics is based on the methods of the theory of experiment planning ("steep climb" and planning of the second degree). As an optimization criterion used generalized desirability function, comprising: a maximum dynamic load on metal construction of crane, braking time and the maximum amplitude of causing swinging load after stopping the crane. The results of the optimization of mechanical characteristics in dynamic braking mode by the example of bridge crane lifting capacity of 20 tons are presented. Braking of crane by optimal characteristic it possible to reduce the maximum load on the metal structure by more than 20%, and the amplitude of causing swinging load after stopping the crane - four times as compared with the braking by block's brake or opposition. The developed method to optimize the mechanical characteristics of the crane's electric drive can be used for operating cranes, and at the stage of their designing
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