Underplatform dampers (UPD) are commonly used in aircraft engines to mitigate the risk of
high-cycle fatigue failure of turbine blades. The energy dissipated at the friction contact …

Jointed structures are ubiquitous constituents of engineering systems; however, their
dynamic properties (eg, natural frequencies and damping ratios) are challenging to identify …

The concept of nonlinear modes is useful for the dynamical characterization of nonlinear
mechanical systems. While efficient and broadly applicable methods are now available for …

The dynamic responses of assembled structures are greatly affected by the mechanical
joints, which are often the cause of nonlinear behavior. To better understand and, in the …

This work refines a recently formalized methodology proposed by DJ Ewins consisting of ten
steps for model validation of nonlinear structures. This work details, through a series of …

Mastering physical phenomena taking place in aircraft engines is a key objective for
manufacturers. Contact interfaces with dry friction in bladed-disks allows decreasing the …

This paper deals with the dynamics of a cyclic system, representative of a bladed disk
subjected to dry friction forces, and exhibits structural mistuning. The nonlinear complex …

Jointed interfaces, damage, wear, or non-idealized boundary conditions often introduce
nonlinear characteristics to assembled structures. Consequently, extensive research has …

This paper investigates how the responses of mechanical joints are influenced by using
different experimental setups. The experiments are conducted on both a monolithic beam …

During operation mechanical structures can experience large vibration amplitudes. One of
the challenges encountered in gas-turbine blade design is avoiding high-cycle fatigue …