Journal Vol – 13 No -4, October 2018 Journal > Journal Vol – 13 No -4, October 2018 Approximate Solution of Strongly Forced Nonlinear Vibrating Systems Which Vary With Time admin October 24, 2018 Based on the combined work of extended Krylov-Bogoliubov-Mitropolskii method and harmonic balance (HB) method an analytical technique is presented to determine approximate solutions of nonlinear differential systems whose coefficients change slowly and periodically with time. Furthermore, a non-…