Ali Al-Shurafa
Five Minute Facts
Resonance Solutions: Reduce Exciting Forces
We've confirmed resonance after collecting data. Now, we need a solution. Let's go back to basic physics; we can focus on the frequency or the amplitude...
- Ali Al-Shurafa
- Saudi Aramco
Five Minute Facts
Resonance Separation Margin
For separation margin, we want to quantify for the x-axis how far we are from the natural frequency. The concept is very easy: you identify the running speed...
- Ali Al-Shurafa
- Saudi Aramco
Two Minute Tips
Resonance Testing Methods
If you suspect resonance, you can confirm it through specialized tests. Some tests, such as mathematical modeling and variable-frequency shaker, are not so common in plant work. But the other two are more common, and these are...
- Ali Al-Shurafa
- Saudi Aramco
Five Minute Facts
A Closer Look at Thrust Ball Bearing Damage
Thrust bearings are usually located on the non-drive end of the equipment. This is a small pump you'd expect to be driven by a motor. But the bearings of horizontal motors are not designed to...
- Ali Al-Shurafa
- Saudi Aramco
10 Minute Talk
Suspect Resonance? Check What the Machine Is Sitting on
The motor in this case study was brought in for a routine PM during the plant’s scheduled downtime. During the run test, they experienced very high vibration, but nothing else was abnormal…
- Ali Al-Shurafa
- Saudi Aramco
10 Minute Talk
Diagnosing and Correcting Resonance in a Vertical Seawater Pump
This case involves a vertical cooling seawater pump in a power plant. The speed is 600 rpm, and it had no noise or operational issues. The current was normal, but they received…
- Ali Al-Shurafa
- Saudi Aramco
Two Minute Tips
Condensate Water Pump Resonance Caused by a Bearing Defect
This case involves a motor-driven vertical condensate water pump. A couple of weeks after commissioning, we noticed a severe increase in vibration…
- Ali Al-Shurafa
- Saudi Aramco
Five Minute Facts
Some Common Symptoms of Resonance
As analysts, we follow a specific workflow to resolve a resonance problem. First, we detect high vibration from routine data…
- Ali Al-Shurafa
- Saudi Aramco
Two Minute Tips
The Physics Behind Vibration and Resonance
Our objective is to collect the vibration in order to identify the input—the force. From basic physics, if you have a mass and shake it by a force, it will vibrate corresponding to...
- Ali Al-Shurafa
- Saudi Aramco
