Defining motion for JOINTG using MOTNJG

Vinaykumar Dhangar_21062

 Motion on Joints with MOTNJG

 

• MOTNJG card used for define Motion interms of displacement, acceleration,velocity,etc for JOINTG. 
• If VALUE field for particular DOF on MOTNJG bulk data entry is positive, then positive relative motion is enforced on joint.
• The actual motion of joint grids may be towards or away from each other depending on the joint interpretation section.

1.MOTNJG Basic Parameter

Format

Where,

Field	Contents
ID	Motion set identification number. (Integer > 0)
JIDi	Identification number of a JOINTG Bulk Data Entry on which the motion is to be applied.
DOF	Degree of freedom component number. No default (1 ≤ Integer ≤ 6)
VALUE	Real Motion value to be applied on the identified degree of freedom for the specified JOINTG joint. For more information, see the corresponding joint description on the JOINTG entry. FIXED The corresponding degrees of freedom of the JOINTG entry are fixed. No default

2.Creating MOTNJG

• Go to Model Browser
• Right click>Create >Create Load Collector
• Provide required name for load collector.

• Provide required number of MOTNJG needed in MOTNJG _Num set Field
• In JID field select required JointG element
• Specifiy required degree of freedom in DOF field
• Enter the load value to be applied in VALUE field

3. Loadstep

• Go to model browser
• Right click>Create >Create Load step
• Select analysis type as Nonlinear static
• Scroll down to find MOTNJG field
• Click to select respective MOTNJG load collector
• Click Ok to close the panel