Equivalent linearization method based on to-cTH-power difference criterionin nonlinear stochastic vibration analysis of multi-degree-of-freedom systems

Basic equations of energy-to-cth-power difference criterion were derived fo r multi-degree-of-freedom ( MDOF) systems subjected to stationary Gaussian excitations with non-zero mean. Modal transform technique was used in order to reduce unknowns. Main computational formulae were presented and suggest ed values of c were given, Numerical results show that the method of this p aper prevails over equation difference criterion both in accuracy and in si mplicity.