Preliminary modeling studies of sudden release of a part of the hoist load with using experimental miniature test crane

In the article, the problem of preliminary studies was carried out on an experimental test bench equipped with an experimental set of measurement sensors. Proposed test stand allows to carry out a series of studies on the phenomena of dynamic loads associated with lifting process. The problem of vibration caused by the sudden release of a part of the load was discussed in this paper. This phenomenon can occur either in the case of hoists fitted with gripping devices such as an electromagnet or a standard gripper but also as in the case of failure and loss of cargo part. This phenomenon is important because of the vibration of the supporting structure in the work cycle, they over exploit the structure and contribute to the multiplicity of fatigue cycles. The application of the proposed test stand on a scale enabled an immediate analysis of the data so important in the verification of the phenomenological model of the analyzed lifting mechanism. This approach will allow for the next stage of research, i.e., hybrid analysis, i.e., combining the dynamic model with the FEM model of the girder. The goal is to develop a simple and accurate model for virtualizing solutions designed to reduce the amount of vibration generated by the sudden release of a part of the load.