.cntf file

The .cntf file is an OptiStruct ASCII format results file.

This file is created when the OPTI format is selected in the CONTF I/O Options entry for Small Displacement Nonlinear Analysis (NLSTAT) runs.

File Contents

Result	Description
Contact Forces	Contact force results from small displacement nonlinear analysis (with contact) runs. Output is controlled by the I/O option CONTF.

File Format

The .cntf file has the following format:

For each iteration, the following header is used:
	iter	Iteration			Numel
where:
iter		is a keyword identifying that the next field is the iteration number.
Iteration		is the Iteration number.
Numel		is the total number of nonlinear quasi-static subcases (with contact) in the entire model.

Within the iteration section, the following information is provided for each subcase:
SUBCASE: <Subcase ID> <Number of Contact Interfaces> LOAD: <Load ID> LABEL: <Label> CONTACT INTERFACE: TOTAL FORCE ACTING ON MASTER SURFACE (BASIC SYSTEM)
	CONTACT#		FORCE-X			FORCE-Y	FORCE-Z	MAGNITUDE
where:
CONTACT#				is the Contact Interface identification number (CTID on the CONTACT Bulk Data Entry).
FORCE-X				is the component of the total contact force along the X-axis of the Basic System.
FORCE-Y				is the component of the total contact force along the Y-axis of the Basic System.
FORCE-Z				is the component of the total contact force along the Z-axis of the Basic System.
MAGNITUDE				is the magnitude of the total contact force acting on the Master Surface.