Vibration analysis of beams treated with passive constrained layer damping using spectral element method

摘要

This paper introduces a spectrally formulated finite element method (SFEM) for the beamsrntreated with passive constrained layer damping (PCLD). The viscoelastic core of the beams has arncomplex modulus that varies with frequency. The SFEM is formulated in the frequency domainrnusing dynamic shape functions based on the exact displacement solutions from progressive wavernmethods, which implicitly account for the frequency-dependent complex modulus of thernviscoelastic core. The dynamic responses obtained by the spectral element method and thernconventional finite element method (CFEM) are compared to evaluate the validity and accuracyrnof the present spectral PCLD beam element model. The spectral PCLD beam element model isrnfound to provide very reliable results when compared with the conventional finite element model.