A new development in the numerical description of road profile realisations

Longitudinal Road Profile Spectrum Approximation by Split Straight Lines

“…Specialized software packages intended for the vehicle design and testing are able to generate an artificial road profile based on a user-defined PSD. Rouillard et al (2001), Sun (2003), Liebig et al (2002), Szöke and Kuti (2004), Steinwolf (2006), or Bogsjö et al 2011presented procedures, which enable a generation of the random time series with given spectral density using the periodic functions. The application of the Sayers roughness model in software for the vehicleresponse modeling is described in (Road-Profile Generation Tool 2009).…”

Optimal suspension settings for ride comfort of road vehicles

“…The first author presented a method where the above-mentioned procedures are improved by the consideration of the nature of these cross-spectral characteristics [14]. As a result, the simulated tracks computed by the improved procedure represent exactly the target standard deviation and autospectrum function.…”

“…The applicability and effectiveness of the discussed procedure were demonstrated by the analysis of measured data of a Hungarian highway. In the following this type of kinematic loading is considered [14]. Neglecting the details the road profile realisations of the two tracks with the assumptions that the rear wheels exactly follow the front ones can be determined as follows:…”

“…The carbody/chassis of a vehicle is supported through the elastic components (hard springs, dampers, tires) of the axle/wheel suspension system on the irregular surface of the road. The irregular road surface causes time dependent kinematical loading process [10,14] during the motion of the vehicle. By the appropriate choice of the suspension parameters it can be achieved that the influence of these forces is minimal for the oscillation of the carbody and for the dynamically computed internal forces, respectively.…”

“…These types of operational loading are described by a stochastic process [14]. In this way it is advised to use sensitivity analysis, which concentrates on the effect of system parameters (structural model, loading) concerning the sensitivity of the objective function.…”