BS ISO 20816-2:2017 is applicable to land-based gas turbines, steam turbines and generators (whether coupled with gas and/or steam turbines) with power outputs greater than 40 MW, fluid-film bearings and rated speeds of 1 500 r/min, 1 800 r/min, 3 000 r/min or 3 600 r/min. The criteria provided in this document can be applied to the vibration of the gas turbine, steam turbine and generator (including synchronizing clutches). This document establishes provisions for evaluating the severity of the following in-situ, broad-band vibration:

• a) structural vibration at all main bearing housings or pedestals measured radial (i.e. transverse) to the shaft axis;
• b) structural vibration at thrust bearing housings measured in the axial direction;
• c) vibration of rotating shafts radial (i.e. transverse) to the shaft axis at, or close to, the main bearings.

These are in terms of the following:

• vibration under normal steady-state operating conditions;
• vibration during other (non-steady-state) conditions when transient changes are taking place, including run up or run down, initial loading and load changes;
• changes in vibration which can occur during normal steady-state operation.

Cross References:
ISO 20816-1:2016
ISO 13373
ISO 20816-5
ISO 21940-31:2013 ED1
ISO 10816-3:2009 Ed 2
ISO 2041:2009 Ed 3
ISO 2954:2012
ISO 3977-3:2004 Ed 2
ISO 21940-12:2016
ISO 7919-3:2009 Ed 2
ISO 7919-4:2009
ISO 10817-1:1998
ISO 10816-4:2009
ISO 5348:1998 (R04)


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