MAKS-2019: New Fatigue Test Technology for Turbine Blades

Rubric: Russia, Industry, Future

Fatigue testing of turbine blades entails the problem related to mounting of accelerometers, as their weight affects behavior of the blade, plus fastening is difficult because of the bent shape of the blades. At the MAKS-2019 airshow, Andrey Nesterov, head of the training center at VISOM instrument-making company told Mil.Press Today how to resolve this problem.

VISOM offers to control a turbine blade movement by a noncontact method, using a high-precision laser vibrometer. In this case, the accelerator is attached not to the blade but to the vibration test bed. This solution is implemented in the Beryozka system designed by the company’s engineers.

Beryozka, a system for fatigue tests of turbine blades

"The system runs the vibration bed at a certain rate, and the laser reads the blade’s resonance. What we’ve got to find is either everything’s okay with the blade after the check time, or the resonant frequency changes. If it grows or drops down, this means some deformation happened to the blade, say, a crack", Andrey Nesterov explained the testing principle.

As for him, Beryozka automatizes the fatigue tests, while cutting time and improving test accuracy.

The International Aviation & Space Salon (MAKS-2019) takes place in Zhukovsky, Moscow Region, from August 27 to September 1. The show is expected to attract at least half a million visitors.

Mil.Press publishes news about the exhibit in the thematic section MAKS.

Valery Butymov

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