Efficient Method for Predicting the Vibratory Response of Linear Structures with Friction Interfaces. Volume 2. Steady-State Vibrations of a Two-Body System with a Frictional Interface

摘要

In recent years it has become increasingly clear that friction damping in joints can affect significantly the dynamic response of structures with friction interfaces. In this report, we analyze the steady-state harmonic response of a system consisting of two spring masses connected by a Coulomb-type friction joint, as the simplest example of structures of this type. Two reasons motivate this work: (1) the simple system can serve as a basis for gaining physical insight into the behavior of more complex systems, and (2) inasmuch as this problem can be solved exactly, the solution can be used to assess the accuracy of approximate methods developed for more general systems. The differential equations governing the motion of the system during slip, partial-slip or stuck conditions of the joint are formulated in dimensionless form in order to identify the parameters controlling the dynamic response and to obtain results that are applicable to a large number of cases. Keywords: Gas turbine engines. (JES).