(20 min.) Case Study: Solving Sub-Synchronous Vibration in Axial Compressor

Rao Vamsidhar, Assistant General Manager, Vizag Steel


Vibration analysis is used to find out root cause for the vibration problem in rotating machinery. When it comes to critical machinery whose stoppage will cause heavy production loss, finding root cause requires extensive analysis of each component causing vibration. Sub-synchronous vibration in rotating machinery is a kind of vibration which could result because of fluid whirl. The fluid could be steam, oil, gas. The following case study is about solving a sub-synchronous vibration problem in a huge axial compressor in an Integrated steel Plant in India. For studying the sub-synchronous vibration problem in the compressor, contribution of each and every component in the compressor is studied and root cause was found and the problem is solved.

1. Attendees will explore correlating process and vibration data for better diagnosis.
2. Attendees can know how decision making can be done for corrective action after fault finding.
3. Studying the root cause for vibration problem taking consideration into each and every component in the rotating machine.


Rao Vamsidhar is a Maintenance Manager having a rich experience of 20 years in the rotating machinery field. He has begun his career as a Management Trainee in Power Engineering Maintenance department in Visakhapatnam Steel Plant, India in 1998 and successfully progressed and elevated to the position of Assistant General Manager in 2016. Throughout his career he is involved in the maintenance, condition monitoring and vibration analysis of high-speed rotating machinery from turbines to balance of plant machinery.

He completed his Bachelors degree in Mechanical Engineering from Andhra University and Master of Business Administration (Finance) from ICFAI UNIVERSITY, INDIA. He is a certified Category IV vibration analyst from Mobius Institute and Certified Reliability Leader (CRL) from The Association of Asset Management Professionals (AMP) and a member of Society for Maintenance & Reliability Professionals (SMRP). He attended IMVAC-2016 INAUGURAL CONFERENCE held in Orlando, Florida and presented case studies in IMVAC MIDDLE EAST 2017 AND IMVAC EUROPE 2017

He has been awarded Jawaharlal Nehru Award, highest recognition for best performance in Visakhapatnam Steel Plant in the year 2015. He is the 1st Indian to be certified as Cat IV vibration analyst from Mobius Institute in the year 2015.

Rao Vamsidhar lives in Viskhapatnam, Andhra Pradesh, India