Design Theory Research And Practices On Adjustable Linear Oil Damper For High Speed Railway Vehicles

From component to system and from theory to practices, This diesis has done extensive research on the fundamental models, optimal design theory -. sensitivity analysis and parameter design etc. of a kind of adjustable linear oil damper on the basis of following the international research steps of oil dampers. The research work focuses on the following four main investigations :1. Theory of Fluid System Design for Adjustable Linear Oil DamperBy use of dynamic mathematical models and dynamic-parameter-compensat ing method, the first research of this item has established the generalized optimiz--ation mathematical model of the fluid system of an adjustable linear oil damper; By use of the mechanical generalized optimization theory and platform, the first research has also made a multi-objective and overall-performance optimal design to the fluid system which gives the damper both the best damping performances and the best economic capacities;By modeling the whole damper and analyzing it by numerical method, the second research of this item has solved the problem of the damper's dynamical damping characteristics calculation, simulation and analysis.2. Theory of Parameter Design by Means of Sensitivity Analysis for Adjustable Linear Oil DamperThis item has done research on the theory and methods to design parameters of linear oil damper by modeling and sensitivity analyzing. This item focuses on two aspects: Research on the wear allowance. Research on the temperature sensiti--vity and thermal dispersion parameters design.3. Research on the Parameter Influence Between Linear Oil Damper and Vertical Dynamics of Railway VehiclesBy developing software for simulation and analysis, this item has done research work on the parameter influence between linear oil damper and the vertical dynamics of railway vehicles. This research work has achieved some fruitson the engineering optimal damping rate choice method on the installation and maintenance guide lines etc. for the axis-box dampers.4. Software and Damper Prototypes DevelopmentBased on the research fruits of this thesis, Based on the mechanical generalized optimization platform and Matlab, a CAD software for adjustable linear oil damper has been developed. Two kind of prototype dampers have been designed and developed by use of this software , frame and endurance test results show that the dampers have gained fine damping characteristics as expected.