GMW GMW14159 Front Frame Torsional Static Stiffness Evaluation Procedure
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GMW GMW14159 Document Information:
Title
Front Frame Torsional Static Stiffness Evaluation Procedure
GM Worldwide
Publication Date:
Sep 1, 2005
Scope:
The Frame Static Stiffness Master Procedure GMW14336, shall be
referenced for detailed information
corresponding to the following procedure.
Note: Nothing in the specification supersedes applicable laws and
regulations unless specific
exemption has been obtained.
Note: In the event of conflict between the English and domestic
language, the English language
shall take precedence.
Purpose.
To determine the front frame torsional static stiffness of the frame
from a full-frame vehicle.
Foreword.
The torsional stiffness of the front frame is an important factor in
the level of on-road shake
experienced by the occupants of a full-frame vehicle. High torsional
stiffness in this area also
provides a solid foundation for the powertrain, front suspension and
steering system, which
simplifies the tuning of the mounts for those components. Frame static
stiffness metrics are
intended as an improvement over the previous practice of specifying
free-free frame mode
frequencies, which have not been shown to relate to full vehicle
performance.
Applicability.
Frames from GM and competitive full-frame vehicles.
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