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Random Forcing Function and Response - …
AN INTRODUCTION TO Random vibration Revision B. By Tom Irvine Email: October 26, 2000. Introduction Random Forcing Function and Response Consider a turbulent airflow passing over an aircraft wing. The turbulent airflow is a Forcing Function . Furthermore, the turbulent pressure at a particular location on the wing varies in a Random manner with time. Direction of Flight Figure 1. For simplicity, consider the aircraft wing to be a single-degree-of-freedom system. The wing would vibrate in a sinusoidal manner if it were disturbed from its rest position and then allowed to vibrate freely. The turbulent airflow, however, forces the wing to undergo a Random vibration Response . Random Base Excitation Consider earthquake motion. The ground vibrates in Random manner during the transient duration. Buildings, bridges, and other structures must be designed to withstand this excitation.
1 AN INTRODUCTION TO RANDOM VIBRATION Revision B By Tom Irvine Email: tomirvine@aol.com October 26, 2000 Introduction Random Forcing Function and Response
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