Investigating the Suitability of Testing Standards for Simulating Vehicle Vibrations during Supermarket Home Delivery
Current guidelines and standards for packaging performance utilize a random vibration signal froma standard Power Spectral Density (PSD) plot to simulate transport vibration. This method averages out accelerationlevels and, therefore, does not take account of the non-stationary and non-Gaussian nature of actualtransport vibrations, which may lead to over conservative packaging design. Many techniques have evolved toaddress the shortfalls of the current approaches. In this paper, the suitability of using these techniques to simulatetransport vibrations arising from home delivery vehicles is investigated. The study considers approachessuch as: PSD; trigger level sampling; high/low spectra; varying RMS; and, shock on random, and comparesthem to time replication test regimes. The preliminary results highlight the limitations of existing standardsand the potential to apply database generated time replication regimes. Vibration data from a supermarkethome delivery vehicle were obtained. Accelerometers were fixed along the length of the vehicle and a GlobalPositioning System (GPS) unit was used to identify road types and conditions along the distribution route inand around a UK city. To allow for large data sets, the accelerometers were connected to a wireless DAQ unit,which transferred the data directly to a PC for storage. The data were logged continuously along the distributionroute to negate any ambiguity that can arise from time and threshold sampled data. The journey was repeatedso that the resulting simulated signals had greater statistical significance.
K.R Griffiths B.J.Hicks P.S.Keogh D.Shires
Department of Mechanical Engineering University of Bath Bath, UK Pira International Leatherhead, Surrey, UK
国际会议
The 17th IAPRI World Conference on Packaging(第17届世界包装大会)
天津
英文
582-586
2010-10-12（万方平台首次上网日期，不代表论文的发表时间）