A deterministic force identification method has been applied in ice-structure interaction. A compliant structure was forced through ice sheets in laboratory (EU-HYDRALAB DIIV test campaign at HSVA in 2011). Structural vibrations caused by crushing failure occurred over a range of velocities and frequencies. The experimentally obtained frequency response function (FRF) matrices and the measured responses were used to solve the inverse problem of identifying the forces at the ice action level. The forces from two vibration tests are presented together with parametric Burg spectra of the responses. They indicate that forces drop on the transition between vibration frequencies, while maximum forces occur with presence of two dominating frequencies. No clear relationship between the natural frequencies, measured response and the peak forces was found.
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