#TITLE_ALTERNATIVE#

• Main Author: HADYAN HAFIZH (NIM : 13605051); Dosen Pembimbing : Dr.Ir.Leonardo Gunawan Ir.Muhammad Kusni,M.T
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/15828
• Institution: Institut Teknologi Bandung

The aeroelastic flutter stability of long span bridge in airflow can be predicted by the unsteady aerodynamic parameter which is also known as flutter derivatives. <br /> <br /> <br /> <br /> <br /> There are three methods to identify flutter derivatives, i.e. analytical methods, numerical methods, and experimental methods. The analytical method is applicable only on streamlined bridge deck. The numerical method needs further justification for its reliability and robustness. The experimental method has been proven by many researchers for its reliability and robustness. Therefore the experimental method was chosen to identify flutter derivatives in this final project. <br /> <br /> <br /> <br /> <br /> The identification procedure of free vibration response based on Ibrahim Time Domain method (ITD) and Modified Ibrahim Time Domain method (MITD) was chosen to obtain the flutter derivatives in this final project. System parameters such as natural frequencies and damping ratios with and without airflow were identified by ITD method and MITD method. The flutter derivatives were then calculated from these parameters. <br /> <br /> <br /> <br /> <br /> The identification of system parameters was carried out by using simulated free vibration response of bridge model. The results showed that ITD method is less accurate in identification of system parameter from free vibration response with noise while MITD method is able to identify system parameter accurately from free vibration response with noise. <br /> <br /> <br /> <br /> <br /> The flutter derivatives identification procedure was validated by estimating flutter derivatives from simulated bridge response with flutter derivatives values calculated by using Theodorsen function. The estimation procedure was able to produce closely the flutter derivatives from the response data.