TY - CONF T1 - Experimental study of a number of nonlinear SDOF systems using the restoring force surface method JO - Proceedings of the International Modal Analysis Conference - IMAC PY - 1991/01/01 AU - Worden K AU - Tomlinson GR ED - VL - 1 SP - 757 EP - 764 Y2 - 2024/10/23 ER -