Measurement and modeling of supersonic hailstone impacts

Hammetter, Chris; Jones, Reid; Stauffacher, Howard Lee; Schoenherr, Tyler Franklin

doi:10.1016/j.ijimpeng.2016.09.001

Cited by 5 publications

(2 citation statements)

References 15 publications

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“…Besides interferometers, accelerometers are frequently used to determine properties of the impact likethe impact position or the transferred momentum [3]- [5]. One ofthe major sources for measurement inaccuracies are random andreflected vibrations [6]. Hammetter et al used an array of accelerometers fixed on the plate to determine the momentum transferred.…”

Section: Introductionmentioning

confidence: 99%

“…Severe mechanical shocks such as caused by bullet impact, typically lead to six degrees of freedom accelerations represented in broadband frequencies. This makes it difficult to determine the overall momentum [6], or the position. Mechanical insulators combined with electrical filters were found to be an appropriate way to over-come this problem.…”

Section: Introductionmentioning

confidence: 99%

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Damping of post-impact vibrations

et al. 2019

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Impacts of solid bodies on rigid plates produce loud noise and strong vibrations. During this impact, flexural waves travel circularly outwards from the point of impact. These waves are used to determine the properties of the impacting body. For accurate location and momentum measurements, it is necessary that the set of flexural waves pass acceleration sensors just once without being disturbed by reflections. Different plate designs are tested with the aim to evaluate the shape, which offers the best damping properties against strong single impact. The investigations showed that the damping properties of the plates are significantly better with a star-shaped design, which is equipped with a damping layer. The novelty presented here is that the damping properties are significantly increased using a star-shaped plate with specially power law formed and damped edges. The work offers a solution to get significant better damping properties and a better signal for impact investigations. The results demonstrate that it is a promising approach for an impact detection system, which could be equally applicable to acoustic damping applications.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%