Reduction of Transient Vibration on $H_2$ Piping System for Generator Cooling in a Power Plant

화력발전소 발전기 냉각용 수소배관계 과도진동 개선

There was the transient vibration on $H_2$ piping system for cooling the generator in a power plant. We found it was resulted from resonance between the natural vibration of the piping system and exciting force from the turbine rotor by measurement and simulation test. We verified it would be changed the mode shape of the piping system by several simulation test for the structural modification of the piping system. Therefore we concluded that the change of natural vibration mode depends on deeply changing effective length of pipe and reducing supports.