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Simulation studies are widespread in vehicle handling/dynamics analysis. Over the years, many researchers have developed vehicle models ranging from a simple half-car model to a very detailed model. There is a general perception that a detailed model is guaranteed to yield a better result; yet it should be noted there are no recommended or standard procedures to measure vehicle parameters required for simulation studies. Recent studies have revealed that different measurement procedures could lead to significant differences in the measured parameters. This paper discusses the issue of model complexity in the context of available input parameters, especially tire data. Also, for vehicular application, the lumped parameter modeling approach and multi-body formulation approach advantages and disadvantages are discussed.

It is a common practice throughout the vehicle manufacturing industry to perform full-scale durability tests on new model vehicles. Durability tests are initially conducted on prototype vehicles for design validation and then later, on production units to ensure it's structural integrity and to obtain data that can be used for future design improvements. In the case of commercial and transit vehicles, this information can be particularly useful for projecting it's minimum expected service life. Vehicle durability testing typically involves subjecting the vehicle to stress inducing inputs similar to those that would normally be encountered in an expected service environment. These inputs are applied to the vehicle at an accelerated rate to reduce the total testing time. Vehicle inputs for a durability test are imparted through either a test track or a mechanical road simulators such as four-post shakers. Each method has its advantages and limitations.