9Haringx J A.On Highly Compressible Helical Springs and RubberRods and Their Application for Vibration-Free Mountings[R].I.Philips Res.Rep.1948,3:401-449.
10Koh C G,Kelly J M.Effects of Axial Load on Elastomeric Bearings[R].Berkeley:UCB/EERC-86/12,Earthquake EngineeringResearch Center,University of California,1986.