Abstract
KEYWORDS Ride simulation, Advanced ride modelling, Driving comfort, Multi-objective Optimization, Structural vibrations
ABSTRACT
The driving comfort of the vehicle passengers is one of the key reasons to buy a passenger car both in premium and in volume vehicle segments. To improve the driving comfort, it is vital to support the development process through advanced CAE-methods to increase development performance and speed at a low development cost level. The suspension system modelling and simulation approach is based on a multi-body simulation tool chain with integrated finite element models of the structural body, powertrain and chassis elements. Advanced correlated models for individual suspension components like for example the hydraulic shock absorbers are integrated to improve the correlation with measurement data from road tests within a frequency range of up to f = 250 Hz. The transfer functions of the vibrations induced by the tire road interactions are influenced by various parameters like for example stiffness and damping properties of vehicle components. To optimize the driving comfort of the vehicle passengers the multi-body simulation environment is coupled to an integrated platform for multi-objective optimization to generate optimal solutions and parameter combinations based on a design of experiments approach using genetic optimization algorithms.