Application of the new ISO 2631-5 to health hazard assessment of repeated shocks in U.S. Army vehicles.

The U.S. Army Aeromedical Research Laboratory conducted a research program to develop a new methodology for health hazard assessment of tactical ground vehicle rides. This paper describes the new method and compares the health risk prediction using the new multiple shocks standard International Standards Organization (ISO 2631-5) to predictions by the current whole-body vibration (WBV) standard (ISO 2631-1). This article also describes the software tool developed to implement both parts of ISO 2631, as well as Army Regulation 40-10. The comparison shows the new standard to be more sensitive to cross-country terrain than other standards. Data analysis demonstrates the applicability of the new ISO 2631-5 standard to tactical ground vehicles, especially in the vertical axis.