No abstract

New designs and ideas are always evolving in automobile industries. Along with these, there are many aspects and complexities faced in controlling noise and vibrations in vehicles. Due to uneven roads, vibrations are generated which in turn degrades not only vehicle performance but also passenger comfort. Accidents are undoubtedly the most dangerous which may cause damage to human lives. Proper material selection of vehicle chassis is essential for reducing vibrations and increasing the safety. Wheelbase and the track dimension also influencing the performance of the vehicle while running on the roads. Road roughness is the key factor which may lead to the unnecessary vibrations that may harm the riders or passengers comfort and vehicle accuracy as well. Different techniques are commonly used to reduce such undesired vibrations. This paper describes a study of chassis transient vibrations and response with different materials for different damping properties. The behaviour of vehicle chassis under vibrations is observed through modelling in these conditions with different parameters. The aim of the presented paper is to show the effect of different computational techniques on designing a vehicle along with Taguchi’s method for optimizing the parameters.

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To reduce the vehicle vibrations is always a major concern in designing a vehicle. The vibrations occur are of two types, torsional and longitudinal vibrations. A vehicle model is utilized for analyzing and measurement of vibrations in it at the time of jump. Vibration values measured on vehicle model are compared with the vibration values in cam-follower systems. If, cam and follower remains in contact, it represents single degree of freedom system. It becomes a two degree of freedom system as soon as the cam and follower separates. This phenomenon of jump creates two new natural frequencies in a system. A force-closed cam-follower was used for the investigation. The system is operated on the cusp of incipient separation. Jump is a situation where the cam and follower physically separate. When they come back together the impact introduces large forces and thus large stresses, which can cause both vibrations. This paper suggests the significance of vibration measurement with experimental modeling and correlation with cam dynamics in vehicle models. The experimentation with results is discussed in this paper.