A shipyard has asked us for measure underwater radiad noise from the hull of a vessel, and they are also asking us to convert the pressure levels obtained to an equivalent noise source strength. Does anyone knows how to calculate the noise source strength of a vessel from the radiated noise...
zjliang,
the characteristics of the pump shaft are:
Shaft length between bearings: 3 m
Shaft diameter: 250 mm
Bearing length: 260 mm
The electric motor shaft (10.000 kW) is coupled to this shaft by a joint which allows deflections.
Thanks for your comments.
Hi,
I have done modal analysis of vertical pump. The problem becomes when I compare the results of my model with the results provided by the manufacturer 15 years ago.
Basically in my model the 1st frequency of the shaft is twice the frequency given by the manufacturer. I can get this result...
I would like to model a journal bearing to calculate the whirling frequency of a shaft inside the its case.
I have done some models using a "point radial restrictions", and then I have model the bearings using a two point restriction per bearing (along its length) at the results were quite...
The problem with the heat exchanger is that the flow rate was increased, and due to this change a baffle inside the exchanger looks to be in resonance (check by means of vibration measurements and CFD and FEM calculations) been the vibrations levels in the outer shell higher than those measured...
Hi,
I want to measure dynamic stress using strain gauges in a heat exchanger (60ºC), but we can't stop the process to glue the gauges correctly. Has anyone ever glue a gauge in a working machine?, how were the results?.
