Effective System Properties and Special Density in Random Vibration With Parametric Excitation

• Autores: F. Rüdinger, S. Krenk, Y.K. Lin
• Localización: Journal of applied mechanics, ISSN 0021-8936, Vol. 69, Nº. 2, 2002, págs. 161-170
• Idioma: inglés
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• Resumen

  • The characteristic frequency and bandwidth of the random response to parametric excitation may be influenced by the excitation processes. It is demonstrated that the effective stiffness and damping properties can be expressed as conditional mean values for given displacement and energy levels, respectively. These properties are used to describe the response in terms of its probability density function and its spectral density function. An example demonstrates the accuracy in predicting change of frequency and damping of a parametrically excited oscillator, and another example extends the method to a self-excited oscillator with domains of negative damping. ©2002 ASME