This paper addresses the vibration levels in commercial truck shipments. Data were collected on various truck shipments in the United States over various interstate expressways. Comperisons are shown for effect of suspension, weight of shipment, and road quality. Data are presented in the form of Power Density Spectrums that can be used for simulating tests on electro-hydraulic vibration tables. These plots are composite spectrums showing the average levels observed in these studies from data collected over 16 000 km of road conditions. Specific data for a section of road condition, load configuration, and suspension used may vary from these average levels. The results of these studies were requested by the ASTM D 4728 Task Group on Random Vibration Testing of Shipping Containers, to be recommended for package testing.
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