M/s Sri Damodaram Sanjeevaiah Thermal Power Station engaged NV Dynamics to conduct a vibration assessment of RCC floor slab in the water intake area of the Cooling Water Pump House. The pump house contains eight large pumps, each drawing water from individual sumps located beneath the structure. Higher vibration levels were reported in a RCC floor slab section corresponding to one of the pumps. Accordingly, the assessment was concentrated on the slab areas aligned with the pumps where higher vibration levels was observed.
Ultra-low frequency vibration transducers were coupled to the floor slab and connected to a data acquisition system to record vibration levels when the pumps were operating in different combinations. Additional measurements were taken on the motor foundation and nearby structural elements to understand how vibrations were transferring through the pump house.
The acquired vibration acceleration data is integrated to vibration velocity and analyzed. Vibration levels were compared with internationally recognized standard (DIN 4150-3:2016) to assess structural safety. The results identified the maximum vibration levels under various operating conditions and helped to evaluate potential impact on the structural integrity of the pump house floor slab.
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