Experimental Study on Seismic Performance of Spring Vibration Isolation Turbine-generator Foundation

Abstract

Abstract. The 1:8 modal tests were conducted on 1000MW turbine generator spring vibration isolation foundation. According to the similarity relation conversion, the displacement response and spring deformation of the model were investigated by pseudo-dynamic test. In the pseudo-dynamic tests, 7 degree frequent and rarely earthquake tests were carried out respectively. By experimental results, the foundation has good working performance, and the story drift is under the limit value provided in Code for seismic design of buildings.

Pseudo Dynamic Test of Spring Vibration Isolation Foundation of Steam-Turbine Generator Considering Gravity Effect

“…The anti-seismic behavior of the steam-turbine generator foundation is studied by pseudo dynamic test in the literatures [2][3][4][5], but the gravity effect is not considered. It is simulated by applying the pre tightening force through the means of manual screw in the literatures [6,7], however, it is not safe and reliable, and difficult to apply the load evenly and accurately, the pretightening force could not reach the expected value, especially for large buildings. Therefore, it is necessary to make a more accurate simulation of gravity by the special device, getting a more objective result by pseudo dynamic test.…”

Experimental Study on Spring Deformation of Vibration Isolation Turbine-generator Foundation under Horizontal Earthquake

“…Dynamic characteristic tests were conducted on turbine-generator foundation [3,4]. Recently, some studies were on the turbine-generator foundation [5,6]. For a turbine-generator foundation, the spring isolation is the core equipment; the spring deformation is needed to study for the turbine-generator foundation.…”