Detecting A Hidden Lateral Rotor Natural Frequency In A Sewage Pump

Case StudyCS

Modifying a Non-Clog Pump Experiencing Multiple Natural Frequency issues Based on Field Vibration Testing and FEA Analysis

Case StudyIn order to fully understand the true causes of the elevated vibration of a non-clog pump, driven by a long drive-shaft, a detailed FEA analysis was used to simulate the entire pump system (foundation and piping) to identify not only the structural modes but shaft lateral critical speed modes as well. This case study will provide the detailed vibration data as well as the FEA modeling that was used to provide solutions to this complex structural and rotordynamic resonance issues

Effects Of Foundation Piers On The Natural Frequencies Of A Vertically Mounted Sewage Pump

Case Stud

Effect Of Foundation Piers On The Natural Frequencies Of A Vertically Mounted Sewage Pump In Resonance With Vane Pass Excitations

Case Stud

Diagnosing And Correcting A Damaging Below-Ground Column Natural Frequency In A Vertical Pump Using Field Testing And FEA

Case Stud

Diario oficial del Ministerio de Marina: Año XVI Número 146 - 1921 julio 5

Short Cours

Monitoring Vibration and Other Critical Machine Conditions

Discussion Grou

Monitoring Vibration and Other Critical Machine Conditions

Discussion Grou

Solving Structural Vibration Problems Using Operating Deflection Shape (ODS) And FEA: Part I & Part II

TutorialThis tutorial focuses on vibration issues in pumps primarily for power plants, refineries, and municipal water and waste water treatment plants. Over the years, the original equipment manufacturer (OEM) and the end user often have been able to solve vibration problems for this kind of equipment based on their experience. An adequate maintenance program can identify and solve typical vibration responses and 1x and 2x running speed due to imbalance or misalignment. However,when the vibration is due to a resonance of structural natural frequency or an unexpected geometry change such as looseness or cracking, it becomes more complicated. The trial and error approach can be time consuming and is considered the least cost effective method to solve this type of problem. Therefore, thorough vibration testing combined with detailed calibrated finite element analysis (FEA) models have become powerful tools to identify and mitigate vibration issues through will-conceived fixes while reducing the risk of introducing new ones. This tutorial will provide and in-depth look at how the combination of field testing and computer analysis can solve vibration issues in a timely and cost-effective manner. Several case studies will be presented that demonstrate this method

Vibration Problems and Solutions in Pumps and Turbomachinery

Short CourseThis course presents analysis and testing methods for pumps and turbomachinery. Focus is on centrifugal pumps of all types, centrifugal compressors, axial compressors, fans, steam turbines and gas turbines. Rotordynamics and bladed disk vibration are included as modules as well as discussion of fluid-induced vibration (e.g. rotating stall and blade pass frequencies), acoustics, and mechanically induced vibration (imbalance misalignment, rubs, looseness). Troubleshooting methods and fixes are discussed with many detailed case histories