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Rear Air Suspension System Simulation and Analysis on Tourist Bus

Author: WangWeiCai
Tutor: TangYingShi；ChenShiFu
School: Hunan University
Course: Vehicle Engineering
Keywords: Air suspension Many-body theory ADAMS virtual prototyping Optimization Analysis
CLC: U463.33
Type: Master's thesis
Year: 2009
Downloads: 245
Quote: 3
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Abstract


Suspension is an important part of the car. By the elastic element, guides and horizontal stabilizer and shock absorber composition, the frame and the axle is elastically connected. Major role in passing between the wheels and the frame all the forces and moments, and uneven road surfaces by the body to ease the impact load, the attenuation resulting vibration of the bearing system in order to ensure a smooth running car. Suspension air spring as an elastic element, is widely used to a variety of vehicle suspension, the domestic passenger cars more than 80% of intermediate use of air suspension. As air suspension with nonlinear stiffness characteristics and relatively complex guiding force transmission mechanism, increasing the air suspension design and matching difficult. In the automotive suspension system design and development process, its movement, dynamics, and control strategies computational analysis occupies a very important position. With mathematics, mechanics, computer and information sciences and other disciplines of development, along with the development of multi-body system dynamics and many-body theory based on mathematical virtual prototyping technology to solve the vehicle suspension and vehicle analysis, design and optimization of powerful tool. In this paper, the air suspension for structural and kinematic analysis, the use of ADAMS virtual prototyping technology, the establishment of a simplified model of the suspension geometry, suspension and wheels beats changes in the parameters of the computer simulation analysis. Kinematics for the analysis and optimization of vehicle suspension design provides a fast and efficient way advanced. Firstly, the design of the air suspension stiffness, migraine frequency, lateral stiffness and lateral are angles are calculated checked. And the use of mechanical system dynamics simulation software ADAMS / Car module, the establishment of a simplified model of the rear air suspension. Establish a road input model, the air suspension structural dynamics simulation of the vertical stiffness of targeted research, get the suspension performance parameters. Based on the results of computer simulation analysis, the design of the vehicle matching air suspension stiffness selection is too large, the preliminary design of the suspension for further structural optimization, the use of ADAMS / Insight establish quadratic regression model simulation and the use of ADAMS / Insight fitted regression equation, regression models were evaluated to optimize the simulation results and post-processing, resulting in a more reasonable size and superior performance of the structure and layout. The rear air suspension system biased design meets standards. Experimental verification by road and the accuracy of its results reference value. By design, modeling, simulation and analysis of the results for the simulation and optimization - this advanced design methods and means to make the ride performance suspension design to achieve the desired design requirements, while improving our daily automotive design process design capabilities and level.

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CLC: > Transportation > Road transport > Automotive Engineering > Automotive structural components > Travel System > Suspension
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