Nonstationary Response Characteristics of Linear MDOF Systems

by K. Papadimitriou, Texas A&M Univ, College Station, United States,
J. L. Beck, Texas A&M Univ, College Station, United States,



Document Type: Proceeding Paper

Part of: Engineering Mechanics

Abstract:

A new approximate methodology for nonstationary random vibration analysis of multi-degree-of-freedom linear systems is developed. Simple analytical expressions for the covariance response are obtained which provide valuable insight into the nonstationary response characteristics and their dependence on the system and excitation characteristics. Reductions in computer time ranging from one to two orders of magnitude are achieved. The performance of the method is demonstrated by an example two-degree-of-freedom system.

Subject Headings: Linear analysis | Vibration | Degrees of freedom | System analysis | Stationary processes | Excitation (physics) | Computing in civil engineering

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