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Evaluation of a Multiaxis Shock Fixture Concept

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Dynamic Environments Testing, Volume 7 (SEM 2023)


Mechanical shock testing utilizing different types of resonating fixtures is an aerospace environmental testing practice useful in simulating mid-field pyroshock. Qualification tests using these methods may be specified in single or multiple test axes, with each axis performed individually or sometimes all at once. Simple structures such as bars, beams, and plates have been used to repeatably perform single-axis resonant shock tests, while plates of varying sizes along with a 90 degree bracket have been used to perform tests that meet all axes requirements in a single shock test event.

This work will evaluate a different fixture concept, used in conjunction with a resonant plate. The fixture is designed to create a controlled resonant response in two axes, which when combined with the plate motion in the third axis can achieve a repeatable resonant shock response in all axes at once, with minimal setup time or operator trial and error. Modal properties of a combined fixture and plate assembly are used as performance objectives for the fixture design. Finite element modeling is used to evaluate and modify the fixture design. A fixture is then fabricated and tested in several configurations to evaluate modal response characteristics, shock response performance, and the performance of the model when predicting those quantities of interest.

This chapter has been authored by an employee of National Technology & Engineering Solutions of Sandia, LLC, under Contract No. DE-NA0003525 with the US Department of Energy (DOE). The employee owns all right, title, and interest in and to the chapter and is solely responsible for its contents. The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this article or allow others to do so, for US government purposes. The DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan

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Correspondence to David E. Soine .

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Sandia National Laboratories is a multi-mission laboratory managed and operated by National Technology & Engineering Solutions of Sandia, LLC, a wholly owned subsidiary of Honeywell International Inc., for the US Department of Energy’s National Nuclear Security Administration under contract DE-NA0003525. SAND2022-14150 C

Disclaimer: This chapter describes objective technical results and analysis. Any subjective views or opinions that might be expressed in this chapter do not necessarily represent the views of the US Department of Energy or the U S government.

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Soine, D.E., Schoenherr, T.F., Heister, J.D. (2024). Evaluation of a Multiaxis Shock Fixture Concept. In: Harvie, J. (eds) Dynamic Environments Testing, Volume 7. SEM 2023. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham.

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  • Print ISBN: 978-3-031-34929-4

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