IMPLEMENTATION OF OPERATIONAL VIBRATION ANALYSIS DUE TO UNDESIRED OSCILLATION BEHAVIOR OF A PUSH-UP SYSTEM
Tim Bijsterbosch - (July 2023)
SUMMARY
In industry, different applications require safe and precise lifting and moving of heavy loads like turbines, machinery, and bridges. A system capable of lifting loads up to 3000 metric tonnes is the push-up system. The push-up system is a multi-point lifting system that supports an object by stacking steel barrels positioned at four corners of the load. The lifting and lowering operations of the system are computer controlled to ensure synchronous movement of all barrel stacks.
During retraction operations, unwanted dynamic behavior of the system is observed. This dynamic behavior is described as the oscillation of the test load. This oscillation behavior gives rise to the challenge of investigating the underlying cause of the problem.
The company's challenge is that the root cause of this system's behavior is unknown. The collaboration between the company and the Dynamics Based Maintenance (DBM) research group aims to underpin this self-induced oscillation behavior's root cause(s) by implementing operational vibration analysis. Achieving this goal will provide the company with the knowledge to take corrective measures to prevent the appearance of self-induced oscillations in the future. The study will conclude the research by analyzing experimental data from a synchronous push-up system.