.cntf file

An OptiStruct ASCII format results file.

File Creation

This file is created when the OPTI format is selected in the CONTF I/O Options Entry for Linear Static, Linear Inertia Relief, and Nonlinear Static 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
Data
Description
iter
Keyword identifying that the next field is the iteration number.
Iteration
Iteration number.
Numel
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
Data
Description
CONTACT#
The Contact Interface identification number (CTID on the CONTACT Bulk Data Entry).
FORCE-X
The component of the total contact force along the X-axis of the Basic System.
FORCE-Y
The component of the total contact force along the Y-axis of the Basic System.
FORCE-Z
The component of the total contact force along the Z-axis of the Basic System.
MAGNITUDE
The magnitude of the total contact force acting on the Master Surface.