Prediction of the Flow-Induced Vibration Response of the Chenderoh Dam Left Bank Section

¹ School of Mechanical Engineering, Engineering Campus, Universiti Sains Malaysia, Penang
² Department of Civil Engineering, College of Engineering, Universiti Tenaga Nasional, Selangor
³ TNB Generation Division, Tenaga Nasional Berhad, Kuala Lumpur
⁴ School of Civil Engineering, Engineering Campus, Universiti Sains Malaysia, Penang

^* Email: zhafran@usm.my

Abstract

Flow-induced vibration is a common phenomenon that happened in any of dam structures during the operational condition. This includes the effect of water spilling from the upstream to the downstream of the dam due to high water volume at the upstream side. the release of water from the dam can be beneficial in generating the electricity source to the surrounding areas. However, in some cases, the spill of water can induced the significant vibration effects to the dam structure. In this study, the prediction of the flow-induced vibration response at the left bank section of the real scale Malaysian Chenderoh Dam model is simulated using the ANSYS software. the input force disturbances from the flow of the water at the left bank section during the normal water spilling condition is investigated. the results of frequency domain response and operational defection shapes (ODS) from the effect of flow-induced vibration are compared with the natural frequencies and mode shapes of the dam. From the results, the transient vibration responses due to the flow of water happened at the frequency of 13.3 Hz while the natural frequency of the left bank section occurred at 52.3 Hz, which indicates that there is no resonance phenomenon for the normal case of water spilling at the left bank section of the dam structure. This result is useful for the dam operation section in order to avoid any disaster of the dam structure.