The influence of joints on friction induced vibration in brake squeal

The effect of joints on flutter type friction induced oscillation in friction brakes is investigated. The work is based on a small characteristic system with elementary joint models. Linear stability analysis is conducted and a harmonic balance method is applied to determine limit cycle amplitudes and bifurcation diagrams. It turns out that in finite amplitude oscillation the resulting dynamic state of the joints is dominated largely by the deflection shape of the underlying linear instability. Both local and global bifurcations do exist and large limit cycle amplitudes may result for quite unexpected parameters, depending on the kind of joints involved and related to their dynamical state.