Dataset of the free decay of a mock-blade with dovetails

This dataset collects the dynamic behavior of a symmetric mock-blade with dovetail attachment at both ends. Data are useful for researcher in the field of non-linear dynamics or contact mechanics. The symmetric mock-blade was assembled in a test rig, loaded with different axial loads, and excited by a shaker at different amplitudes and frequencies. After the excitation phase, the shaker drive rod was removed from the contact point on the blade to obtain a real free decay. The initial condition is given by the velocity amplitude of the blade mid-point. Data are collected under different axial loads and for two modal shapes, namely the first and the second bending mode. The dataset comprises the velocity free decay as measured and after filtering. The latter data are ready to be immediately reused by users. Post-processed data, namely amplitude-dependent frequency and loss factor are also available. The reduced-order models of the blade and supports are also shared. Moreover, solid models of the blade and support are given so that users can build their own finite element model of the whole system.
Reference (*) describes in detail the experimental apparatus, the instrumentation used for the measurements, and the procedure used to acquire the data.
(*) M. Glorioso, D. Botto, On the significance of contact stiffness in turbine blade attachments, Mech. Syst. Sig. Process, Submitted.