RSPEED

Bulk Data Entry

RSPEED – Reference Rotor Speed Values

Description

This bulk data entry is used to specify a set of reference rotor speed values for asynchronous analysis in Rotor Dynamics.

Format

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
RSPEED	SID	S1	DS	NDS

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
RSPEED	25	1500	50	5

Argument	Options	Description
SID	<Integer > 0> No default	Set identification number.

S1	<Real > 0.0> No default	Specifies the first reference rotor speed in the set.

DS	<Real > 0.0> No default	Specifies the increment in reference rotor speed. This value is added to each successive entry starting from the first entry (S1).

NDS	<Integer > 0> Default = 1	Number of reference rotor speed increments.

1.	The RSPEED bulk data entry is referenced by the SPEED field on the RGYRO bulk data entry. If an integer value is specified in the SPEED field, multiple reference rotor speeds specified in the RSPEED entry are used in asynchronous analysis.

2.	In asynchronous frequency response analysis, if the RSPEED bulk data entry is referenced in RGYRO, only the first frequency is considered. In complex eigenvalue analysis, the full range specified by RSPEED is considered.

3.	The following formula is used to populate the set of reference rotor speeds:

Where,

R1, R2, … RNDS represent the set of reference rotor speeds

S1 is the first reference rotor speed

DS is the reference rotor speed increment

NDS is the number of reference rotor speed increments