A method is proposed for fitting the so-called contact stiffnesses (CSs) of interface elements for a nonlinear dynamic model (NDM) of a bladed disk with integral contact couplings. The method is based on comparison between frequencies of the resonant response of NDM and known ...

Currently, long blades of rotating wheels of steam turbines’ low-pressure stages comprise integral structural contact elements. The contact elements reinforce the bladed disk, which leads to re-tuning its natural frequencies. But they also act as friction dampers in the case of higher v...

This work is focused on the computation of vibrations for the last stage bladed disks of steam turbines. The blades with two integral structural contact (ISC) couplings are considered. The cyclic symmetry properties of bladed disks and the method of modal transformation utilising f...