Thanks for your replies,
rotaryworld: I will do that. I thought, that a lot of pump user that work with API have to deal with this topic and so I am interested in your opinion and experience about this topic.
ccfowler: I would say that this is a lateral effect, but very interesting. This is a...
Dear specialists,
in the latest API 610 11 edition the chapter for torsional analysis enlarged. In 6.9.2.5 c.) it is stated, that 1x and 2n torsional excitations exist, even in the configuration motor-coupling-pump. Especially with the use of VFD it is possible to have a natural frequency in...
