Vibration phenomenon exists in partial area on the trubine platorm of unit No.1 in one power plant

It is judged from vibration area and frequency analysis that the vibration is due to pipe vibration transferred to the floor via the suspender. For this reason a limit spring hanger

which has both vibration-isolation effect of the spring and maintained the property of original rigid hanger

had been designed. Arter installing

the max. vibration amplitude of the said floor be-comes 0.013 mm

sensation of vibration being obviously reduced

reaching the anticipated purpose.