GMW GMW14198 Front Frame Vertical Static Stiffness Evaluation Procedure
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GMW GMW14198 Document Information:
Title
Front Frame Vertical Static Stiffness Evaluation Procedure
GM Worldwide
Publication Date:
Sep 1, 2005
Scope:
The Frame Static Stiffness Master Procedure GMW14366 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 vertical static stiffness of the frame
from a full-frame vehicle.
Foreword.
The vertical stiffness of the front frame is an important factor in
the level of on-road shake and
steering wheel dither experienced by the occupants of a full-frame
vehicle. High vertical 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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