GMW GMW14202 Exhaust System Modal Analysis Evaluation Procedure

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GMW GMW14202 Document Information:

Title
Exhaust System Modal Analysis Evaluation Procedure

GM Worldwide

Publication Date:
Sep 1, 2005

Scope:

The Shaker FRF Acquisition and Experimental Modal Parameter Estimation Master Test Procedures, GMW14228 and GMW14229, shall be referenced for more 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 in-situ exhaust system natural frequencies up to 100 Hz.

Foreword.

Exhaust system modal performance is called out to benefit vehicle noise and vibration performance at idle.

Applicability.

This test procedure is appropriate for use with all powertrain and exhaust combinations.

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