Browse Publications Technical Papers 1999-01-2780
1999-09-14

Using the Simulation Model for Predicting Fatigue Stresses of a Log Crane 1999-01-2780

The present paper introduces a method based on dynamic simulation for determining the cyclic stresses in a hydraulically driven log crane. A detailed simulation model that defines a log crane was constructed. The simulation model incorporates a flexible spatial mechanism and a complicated hydraulic circuit. The complete simulation model was built up in the ADAMS mechanical analysis software environment in which the flexible mechanism model and the equations describing the hydraulic system were combined. The complete simulation model was verified by comparing actual measurements to numerical results. This comparison shows that there is a clear correspondence between the simulated and measured results. It was thus shown that it is possible to create a simulation model which can be used realistically for determining stresses in fatigue analysis. The obtained model was employed in the study of the fatigue stresses which are formed when the crane is being loaded.

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