1. A simplified He's frequency–amplitude formulation for nonlinear oscillators. Issue 1 (March 2022) Authors: Ren, Zi-Yin Journal: Journal of low frequency noise, vibration, and active control Issue: Volume 41:Issue 1(2022) Page Start: 209 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗