MODELING OF VIBRATION AND STRESS DUE TO UNBALANCE MASS

• Main Author: ARIF FATHULLAH (NIM : 13105093); Pembimbing : Prof. Dr. Ir. Zainal Abidin, MAULANA
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/16398
• Institution: Institut Teknologi Bandung

Vibration is one cause of mechanical failure. Vibration can be originated from a rotating unbalance mass. Vibration can cause mechanical stress that triggers the occurrence of crack. Therefore, this research is intended to predict the magnitude of vibration and mechanical stress on a simple beam through modeling of dynamic load. <br /> <br /> <br /> In this research, dynamic load modeling is performed using a software based on finite element method and using a manual analytical method. In modeling using software, <br /> <br /> <br /> the model is built using ANSYS Workbench 12. Meanwhile, there are two models built in the analytical modeling. The first model was built by treating the dynamic load as a static load while the second model was constructed by simplifying a multi degrees of freedom system as a single degree of freedom system. The modeling results are then validated with the results of dynamic load measurement. <br /> <br /> <br /> The test results show that the stress level is dominant at the place where high deformation occured. Moreover, the level of stress in other place in the beam is also dominant eventhough the deformation level in this place is small. This place is either near the clamping position or vibration node. <br /> <br /> <br /> The modeling results show that the model which is created using the finite element software can only estimate the mechanical stress around the clamping position. However, the mechanical stress on a remote position of the clamping cannot be predicted accurately. Meanwhile, the analytical modeling results show that the two models being developed cannot predict the vibration level of beam accurately.