Optimizing B45 bus frame structure to reduce passenger seat vibration

Abstract

Vibration and noise on buses are important criteria that need improving in order to ensure comfort and safety for passengers. In a bus structure, the vehicle frame plays a major role in transmitting vibrations from stimulating sources such as engines, road surface,... to passenger seats. Optimizing bus frame stiffness is an effective solution to reduce vehicle vibration, creating comfort for passengers. This article deals with a simulation model of a B45 bus structural frame via the use of Hyperworks software. Based on the analysis of vibration results, the authors chose the optimum bus frame structure, changed the stiffness of the vehicle frame, thereby minimizing passenger seat vibration and meeting maximum comfort according to ISO Human Body Vibration standards (ISO 2631-1). Vibration results of the bus structural frame before and after optimization have been verified by experimental measurements of vibration at various positions of passenger seats.