#TITLE_ALTERNATIVE#

• Main Author: HUDA (NIM 23105016), FEBLIL
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/7895
• Institution: Institut Teknologi Bandung

On rotating rotordynamics system, vibration problem often occurred. Therefore, in order that vibration spectrum analysis can be carried out well and safe operational speed can be determined, the information about natural frequency and critical speed of the shaft rotor system should be known well too. The values of natural frequencies of rotordynamics are depending on its rotational speed.<p>In this research, rotordynamics numerical programming and modeling have been constructed by using Matlab 7.0 and Nastran 2005 to predict natural frequencies and critical speeds. The rotordynamics numerical programming and modeling are then validated using model in the literature. The results show that the validity of modeling is very good.<p>A new experiment method on rotordynamics is developed to investigate the natural frequencies on rotating condition. FRF test is also conducted to investigate the natural frequencies on static condition. Data from both experiments are then plot in Campbell diagram, and several values of the lowest critical speed can be determined. Experiments show that the value of critical speeds have good similarity with the value obtained by modeling the rotordynamics system in Matlab 7.0 and Nastran 2005. <br /> <br />