... that are dependent on the vibration amplitude. In the microslip regime, the dissipation varies as a power of the amplitude. The four-parameter Iwan model can capture both the hysteretic and power-law dissipation behavior that is characteristic of many bolted joints. However, simulating the dynamic response...

... mode shapes of modes 7, 8, and 9, the nonlinear modes of the Sumali beam: (a) first bending mode (mode 7), (b) second bending mode (mode 8), and (c) third bending mode (mode 9) Iwan model averaging method explicit integration microslip modal model damping dynamics modal analysis...