Dynamic Analysis of Heave Motion for a Transport Vehicle Fluid Suspension

摘要

A general lumped-parameter technique for the dynamic analysis of vehicle fluid suspensions operating in the heave mode (translational motion along an axis normal to the mean surface of the vehicle guideway) is presented. The analysis includes the effects of sealing region characteristics, of the fluid source, of the internal geometry, and of base flexibility. A linearization of the general system equations is given which is useful in the study of vehicle-suspension stability and dynamic behavior when the variations in support force are small compared with the average force. The analytical technique described is applied to formulate simple dynamic models for plenum, peripheral-jet, and flexible-base fluid suspensions. The parameters appearing in the dynamic equations can all be determined from computations or measurements of only the static characteristics of the suspensions. Analytical and graphical methods of finding these static parameters are discussed. (Author)