地震模拟试验中地震波再现精度的研究

Research on the Reproductive Accuracy of the Earthquake Wave in the Earthquake Simulating Test

本文分析了电液伺服伐和振动台负载特性对振动台台面再现地震波精度的影响.伺服伐是非线性元件,在作动器出力小于额定出力2/3范围内,可忽略非线性影响.提高台面质量与负载质量比是提高地震波再现精度的方法之一.负载的非线性是影响控制精度的主要因素,本文提出了地震波再现精度的主要控制指标.

The properties of the electric—hydraulic servo valve and the load of shacking table influence the reproductive accuracy of the earthquake wave.The servo valve is a nonlinear element, which can be linear when the active force of the actuator is less than its 2/3 maximum force. The nonlinear properties of the load decrease the reproductive accuracy. Increacing the mass ratio between the table and the load is one way to improve the reproductive accuracy.Indexes about the compute iteration are introduced in this paper according to our testing experience.