Abstract
The current paper describes an apparatus for full-scale vehicle crash test experimentation. This apparatus is referred to as the harp. In brief, the harp may either accelerate a trolley which is impacted into a test vehicle or the test vehicle itself may be accelerated and impacted into an object such as a barrier, a pole, or another vehicle. If a trolley is accelerated, it is equipped with load cells to record the axial crushing force. If a test vehicle is accelerated, it is equipped with a three-axis accelerometer to record the crushing force. At the impact site, high-speed cameras and instrumentation record vital data during the crash.
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Appendix A: 3-D model of the rotating arm
Appendix A: 3-D model of the rotating arm
The rotating arm was modeled in solid works in order to estimate its moment of inertia. This was done because the moment of inertia was not reviled in the article on the kicking machine [21]. Although the general shape of the arm is known from the schematics of the kicking machine, there are uncertainties related to the thickness of the arm. For this reason the moment of inertia was calculated for various thicknesses. Finally, the moment of inertia corresponding to a thickness of 40 mm was selected. I = 3097.7 kg m2 (Table 1 and Fig. 5).
3-D model of the rotating arm
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Johnsen, J.S., Karimi, H.R. & Robbersmyr, K.G. The harp: a vehicle crash test apparatus for full-scale crash test experiments. Int J Adv Manuf Technol 63, 1073–1080 (2012). https://doi.org/10.1007/s00170-012-3960-3
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DOI: https://doi.org/10.1007/s00170-012-3960-3