Frequency and Spatial Shaping of Inputs for Multiaxis Shaker Testing

Article type: Research Article

Authors: Smith, Craig C. | Staffanson, Forrest L.

Affiliations: Department of Mechanical Engineering, Brigham Young University, Provo, UT 84602-4102 | Ogden Engineering Laboratory, TRW Strategic Systems Division, Ogden, UT 84403-2400

Abstract: Controlled amplitude and phase relationships between multiaxial shaker inputs (i.e., spatial shaping) provides for more realistic simulation of a service environment than does conventional frequency shaping alone. Spatial shaping is described in terms of a basic mathematical model relating test article response (absolute and relative motions) to excitation by the shaker. Advantages and objectives are viewed through spectral relationships. The objective of simulating dynamic responses as in service is shown to be the duplication of the resultant cross-modal response for all important modes, even if the sources of excitation in service are unknown.

DOI: 10.3233/SAV-1996-3601

Journal: Shock and Vibration, vol. 3, no. 6, pp. 393-401, 1996