Abdulmuttalib A. MUHSEN , Ali A. Resan AL-MALIKI , Bashar H. ATTIYA , Omar Farhan AL-HARDANEE and Karam Aied ABDALAZIZE
الملخص الانجليزي
Abstract. In this study, numerical analysis is conducted to investigate the failure modes in
Kaplan turbine. All necessary steps for Kaplan turbine failure analysis are presented in this
work using the modal analysis computational approach. The modal behaver analysis is carried
out on a model of an existing Kaplan turbine blade, which is based on the existing turbine used
in Haditha hydropower plant in Iraq. This work investigates the modal behavior of the blade of
interest, which aid in predicting structural damage initiation. The Kaplan turbine blade is
designed using the commercial software ANSYS and SolidWorks. To simulate the blade in
operation, the blade is fixed from one end, and all degrees of freedom are measured. Moreover,
the turbine blade is moved and rotated to simulate multiple operational conditions. Both mode
shapes and natural frequencies are predicted and analyzed using the two aforementioned
commercial software and the numerical formula involving the arrest Lanczos method. It is
clear from the results that the natural frequency of the specified mode shape does not match
with the natural frequency of the runner blade. Hence, there is no failure due to resonance
phenomenon in this specific Kaplan turbine. The future work must investigate other aspect of
the failure modes in such turbine, such as unbalance dynamic loading. The Results obtained
from this study will help study the different possibilities for detecting the failure of the Kaplan
blade by examining the modal behavior of the blade.
تاريخ النشر
01/06/2021
الناشر
OP Conf. Series: Materials Science and Engineering
عبدالمطلب عبدالكريم محسن | Abdulmuttalib Abdulkareem MUHSEN | 5344