HYDRAULIC VIBRATION ANALYSIS OF BULB TUBULAR PUMP-HOUSE CONSIDERING FOUNDATION RADIATION DAMPING

摘要

On the basis of pressure pulsations recorded at some locations, the pressure pulsation field of the whole flow passage is structured. Dynamic time-history analysis of pump-house of Huaiyin third pumping station caused by pressure pulsations are carried out to calculate dynamic responses of large-scale bulb tubular pump-house. Compared with the conventional method of fixed boundary with no weight foundation, numerical values of dynamic responses reduce by about 50% at the most considering foundation radiation damping, and the influence of the factor is very prominent to dynamic responses of Huaiyin third pumping station. At the same time, control standards of anti-vibration safety are proposed to evaluate vibration of pump-house. The results indicate that Huaiyin third pump-house meets the requirements of the suggested standards.