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Importing Romax Models

About Importing Romax Models Using Adams View

Adams View imports Romax model files (*.R2A extension) from the Romax DT package of products and converts them into an Adams model comprised of a set of Adams View and Adams Machinery objects. This capability is intended to provide users with a good head start to creating an Adams model on the basis of a pre-existing Romax model.

Supported Romax Entities

The Romax entities supported by this feature and the Adams objects to which they are mapped are listed below:

Romax Entity:	Adams View / Machinery entity:	Method	Comment
Rigid Connection	Adams View Field		If the default or more than default stiffness value is used, a fixed joint gets created instead of an Adams View FIELD entity. Default values in Romax - Axial Stiffness: 1.0e9 N/mm X radial Stiffness: 1.0e9 N/mm Y radial Stiffness: 1.0e9 N/mm Torsional Stiffness: 1.0e12 Nmm/rad X tilt Stiffness: 1.0e12 Nmm/rad Y tilt Stiffness: 1.0e12 Nmm/rad
Full Matrix Rigid Connection	Adams View Field
Concept Stiffness Bearing	Adams Machinery Bearing	Compliant
Stiffness Bearing	Adams Machinery Bearing	Compliant	If default or more than default stiffness value is used, a revolute joint gets created instead of an Adams Machinery Bearing. Default values in Romax - Axial Stiffness: 1.0e6 N/mm X radial Stiffness: 1.0e6 N/mm Y radial Stiffness: 1.0e6 N/mm X tilt Stiffness: 1.0e9 Nmm/rad Y tilt Stiffness: 1.0e9 Nmm/rad
Full Matrix Stiffness Bearing	Adams Machinery Bearing	Compliant
Clearance Bearing	Adams Machinery Bearing	Clearance
Rolling Bearing	Adams Machinery Bearing	Detailed	See Supported Romax Rolling Bearing Types.
Detailed Spur/Helical Gears	Adams Machinery Helical Gears	3D Contact	Adams Gear AT Property file will be exported.
Detailed Straight/Spiral Bevel Gears	Adams Machinery Bevel Gears	3D Contact
Detailed Hypoid Gears	Adams Machinery Hypoid Gears	3D Contact
Concept Helical Gears	Adams Machinery Helical Gears	Simplified
Loading Gears	Adams Machinery Spur Gears	Coupler
Concept Planet Gears	Adams Machinery Planetary Set	Simplified
Concept Epicyclic Detailed Planet Gears	Adams Machinery Planetary Set	Detailed	In Romax you can set planetary gears with uneven spacing by selecting option “allow uneven planet spacing (if necessary)”, in that case R2A translated planet gears may not have proper gear mesh as uneven spacing is not supported by Adams.
Loading Planet Gears	Adams View Parts and General Constraint
Bevel Gear Set (Loading Bevel Gear)	Adams Machinery Spur Gears (with proper shaft orientation)	Coupler
Concept Bevel Gears (Loading Bevel Gears New)	Adams Machinery Spur Gears (with proper shaft orientation)	Coupler
Loading Hypoid Gear Set	Adams Machinery Spur Gears (with proper shaft orientation)	Coupler
Concept Gleason Hypoid Gear Set (legacy)	Adams Machinery Hypoid Gears	Simplified
Loading Worm Gear set	Adams Machinery Spur Gears (with proper shaft orientation)	Coupler
Concept Worm Gear Set	Adams Machinery Worm Gears	Simplified
Loading Beveloid Gear Set	Adams Machinery Spur Gears (with proper shaft orientation)	Coupler
Concept Beveloid Gear Set	Adams Machinery Spur Gears (with proper shaft orientation)	Coupler
Loading Face Gear Set	Adams Machinery Spur Gears (with proper shaft orientation)	Coupler
Concept Face Gear Set	Adams Machinery Spur Gears (with proper shaft orientation)	Coupler
Shaft	Adams View Rigid Part		Revolution geometry as per defined sections. See Recommended Actions for Translated Rigid Parts.
Dynamic Rotor Disc	Adams View Rigid Part
Unbalanced Load	Adams View Point Mass		located at offset distance
Power Load	Adams View Marker		Created on associate part
Electric Machine Rotor	Adams View Rigid Part		Attached using fixed joint to associated Shaft part
Housing/ Casing	Adams View Rigid Part		When modelled as a flexible body in Romax, the Romax mesh can be used to generate tessellated geometry in Adams. To do so, place the Romax mesh BDF in the current working directory of the Adams session in which the *.R2A file will be imported. See Recommended Actions for Translated Rigid Parts.
Spline Coupling	Adams View GForce		If default or more than default stiffness value is used, a fixed joint gets created instead of an Adams View GFORCE entity. Default values in Romax - Radial Stiffness: 1.0e6 N/mm Torsional Stiffness: 1.0e12 Nmm/rad
Imported Stiffness Component	Adams View Rigid Part		The part's geometry is created out of Romax exported BDF. The exported BDF should present in current working directory. See Recommended Actions for Translated Rigid Parts.

Supported Romax Rolling Bearing Types

Adams View currently supports the following Romax Rolling Bearing types:

Romax Rolling Bearing	Adams Machinery Detailed Bearing Type	Adams Bearing AT Property File Export	Comment
Radial Ball Bearing	Deep Groove Ball Bearing Single / Double Row	Yes
Thrust Ball Bearing	Deep Groove Thrust Ball Bearing One Sided	No	Only single row is supported
Angular Contact Ball Bearing	Angular Contact Ball Bearing Single Row	No	For double row 2 single bearing with proper orientation will be created
3 or 4 Point Contact Ball Bearing	Four Point Bearing	No	3 Point not supported
Cylindrical Roller Bearing (single and double row)	Cylindrical Roller Bearing Single / Double Row / Full Complement	Yes
Needle Roller Bearing	Needle Roller Bearing with /without Internal ring / Needle Cage	Yes
Taper Roller Bearing	Taper Roller Bearing Single Row	Yes	For double row, 2 single bearings with proper orientation will be created
Spherical Roller Bearing	Spherical Roller Bearing	No
Thrust Roller Bearing	Axial Cylindrical Roller Bearing	Yes
Thrust Needle Roller Bearing	Axial Cylindrical Roller Bearing	Yes
Thrust Spherical Roller Bearing	Axial Spherical Roller Bearing	No

Bearing AT Optional and Calculated parameters

When a Romax model contains detailed rolling element bearings that are supported by the Bearing AT modelling methodology, Bearing AT input property files are generated when importing the *.R2A file into Adams.

Note:

■Some parameters used in Bearing AT are unavailable directly in the *.R2A file, but they are calculated upon generation of the Bearing AT property file.

■Some parameters that are available in *.R2A file are optional inputs to Bearing AT.

The following table lists the parameters which are either in the *.R2A file but optional for Bearing AT, or are not in the *.R2A file but calculated while generating the property file:

Bearing AT Type	Parameter	Status
Ball Bearing	Limiting Speed	Informative
	Reference Speed	Informative
	Contact Division	Calculated
	Inner Contact Angle - Max	Calculated
	Inner Contact Angle - Min	Calculated
	Outer Contact Angle - Max	Calculated
	Outer Contact Angle - Min	Calculated
	Static/ Dynamic/ Fatigue load rating	Not supported by property file
Roller Bearing	Axial Limit	Informative
	Limiting Speed	Informative
	Reference Speed	Informative
	Inner Contact Angle	Calculated
	Outer Contact Angle	Calculated
Tapered Roller Bearing	Cont. Cone Apex Distance	Informative
	Limiting Speed	Informative
	Calculating Factor (Y)	Informative
	Contact Angle Cone	Calculated
	Contact Angle Cup	Calculated
	Chamfer Angle Cup Front	Calculated
	Chamfer Angle Cup Back	Calculated
	Chamfer Length Cup Front	Calculated
	Chamfer Length Cup Back	Calculated
	Front Cone Axial Support Diameter	Calculated
	Back Cone Axial Support Diameter	Calculated
	Front Cup Axial Support Diameter	Calculated
	Back Cup Axial Support Diameter	Calculated
Needle Bearing	Axial Limit	Informative
	Crown Drop	Calculated
	Crowning Width Needle	Calculated
	Inner Contact Angle	Calculated
	Outer Contact Angle	Calculated
Axial Roller Bearing	Inner Raceway Diameter	Informative
Axial Roller Bearing	Outer Raceway Diameter	Informative

Gear AT Optional and Calculated parameters

When a Romax model contains detailed gears that are supported by the Gear AT modelling methodology, Gear AT input property files are generated when importing the *.R2A file into Adams.

Note:

■Some parameters used in Gear AT are unavailable directly in the *.R2A file, but they are calculated upon generation of the Gear AT property file.

■Gear AT has a rim diameter input and no gear web information is stored into property file. Due to this, the gear mass calculated by Gear AT can differ compared to the Romax value as well as compared to the Adams Machinery value.

■When gear blank for internal gear in Romax is solid (integral with shaft) then Gear AT rim diameter property is mapped to internal rim diameter from *.R2A file.

The following table lists the parameters which are either in the *.R2A file but optional for Gear AT, or are not in the .R2A file but calculated while generating the property file:

Gear AT Type	Parameter	Status
Spur/Helical	Reference Thickness Coefficient	Calculated
	Tip Form Diameter	Calculated
	Lead Modification
	Neg/ Pos Position	Calculated
	Profile Modification
	Tip / Root Relief Position	Calculated
	Barreling Root/ Peak/ Tip Position	Calculated
	Slope Length	Calculated

Recommended Actions for Translated Rigid Parts

Some Romax entities typically modelled flexibly are not mapped to Adams objects with flexibility and instead Adams rigid parts are created by the model translation process. The following sections provide recommendations for how you can convert such rigid parts to flexible bodies:

■Useful Help Links

Useful Help Links

Following help links will assists to convert the rigid part into flex or to import existing flexible bodies

1. Replacing Existing Bodies with Flexible Bodies

2. Swap a rigid body for another flexible body

3. Connecting Flexible Bodies to Your Model

4. Romax FE Part to Adams Flexible Body