Ticari araçların arka aks tasarımında gürültü oluşumunun analizi ve tahmini

Noise is one of the major and subsequent problem for automotive industry and prevention of this problem sometimes can be easy if it is component based or isolation problem but if the problem is caused by design and additionally if it is hard to predict this problem's effects on unmanufactured vehicle and it is always hard to prevent this problem because of automotive design duration and phase layout.Therefore it is significant to predict the design sourced problems before the design frozen and vehicle manufactured. In the absence of prototypes, analytical methods such as finite element analysis are very useful in resolving noise and vibration problems, by predicting dynamic behaviour of the automotive components and systems. Finite Element Analysis (FEA) is a simulation technique and involves making assumptions that affect analytical results. This study handed out an encountered problem of an vehicle rear axle system components design parameters and try to predict this noise propagation according to experienced targets values. Ford Transit medium commercial Jumbo bus vehicle model investigated for this study.According to customer expectations and marketing strategy, new axle variant(Single Rear Wheel-SRW) analysed in nvh perspectives.Since the most important nvh problem is gear whine for a rear axle, the connection between gears modelled specifically with using Hypoid gear simulation tool(HGSiM). Modal and FRF analysis were performed at Optistruct tool. Results compared with previous axle model(Double Rear Wheel-DRW) and accordingly compared with test results for future studies.As design effect to noise and vibration,rear axle tube thickness and final drive ratio are investigated and compared. This study help to understand a vehicle design related nvh problem and direct the design to prevent issues before the vehicle manufactured.Numerical studies make benefits to manufacturer as a cost and time saving improvements.Therefore this kind studies are very important for automotive industry.