PT02 - Methods to Determine and Specify Pump Dynamic Analysis

Abstract

Vibration caused by resonance is an industry problem for new and retrofit applications that persists due to lack of specification and upfront analysis. To limit the chances of resonant vibration, dynamic analysis of the structure and rotating assembly to evaluate structural, rotor lateral and rotor torsional frequencies is done when the pump installation warrants it. However, dynamic analyses take time, require expertise, and cost money and it is not always clear when a pump is purchased if the installation warrants the expense of analysis. The purchaser the type and level appropriate. This results in poor specification, missed specification, or specification of analysis when it is not needed. ANSI/HI 9.6.8 Rotodynamic Pumps Guidelines for Dynamic of Pumping Machinery is the first American National Standard to cover this topic; it provides methods to evaluate the risk and uncertainty of a pump installation so that the purchaser can specify the proper analysis when it is required and a standard specification template is provided to aid the user. This session will educate on the issue of resonance, review the importance of the guideline, how to apply the guideline, risk factors, levels of analysis and methodology as well as supporting case studies.