Driving comfort analysis of an agricultural tractor with the Hohenheim Tyre Model on complex tracks

摘要

The driving comfort of agricultural tractors - meaning the driver's isolation from whole-body vibrations - is increasingly targeted by legislation and vehicle manufacturers. To increase the efficiency of the development process, virtual methods based on the objective evaluation of vibration values can be used. This paper presents a method to objectively evaluate the driving comfort of an agricultural tractor with a multi-body simulation model. The evaluation is exemplarily based on international standards such as the ISO 2631-1 standard for the evaluation of whole-body vibrations and the EU Delegated Regulation 1322/2014 for the evaluation of driving seats. A standard roadway referred to by the ISO 5008 standard is used as vehicle excitation. A special focus is set on the ability of the Hohenheim Tyre Model to generate the force inputs of the vehicle multi-body model as exact as possible. The investigations presented are summarised by validation measurements on a smoother track standard roadway with a test tractor. The measurements and the simulation results show a good correlation in both time and frequency domain.