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2024 | OriginalPaper | Chapter

6. Evaluation of a Multiaxis Shock Fixture Concept

Authors : David E. Soine, Tyler F. Schoenherr, Jack D. Heister

Published in: Dynamic Environments Testing, Volume 7

Publisher: Springer Nature Switzerland

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Abstract

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.

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Literature
1.
go back to reference Davie, N.: The controlled response of resonating fixtures used to simulate pyroshock environments. In: The Shock and Vibration Bulletin. Bulletin 56 Part 3, The Shock and Vibration Information Center, Naval Research Laboratory (August 1986) Davie, N.: The controlled response of resonating fixtures used to simulate pyroshock environments. In: The Shock and Vibration Bulletin. Bulletin 56 Part 3, The Shock and Vibration Information Center, Naval Research Laboratory (August 1986)
2.
go back to reference Davie, N., Bateman, V.: Recent Developments in Pyroshock Simulation Using Fixtures with Tunable Resonant Frequencies. Proceedings – Institute of Environmental Sciences (1994) Davie, N., Bateman, V.: Recent Developments in Pyroshock Simulation Using Fixtures with Tunable Resonant Frequencies. Proceedings – Institute of Environmental Sciences (1994)
3.
go back to reference Sisemore, C., Babuska, V., Flores, R.: Multi-axis Resonant Plate Shock Testing Evaluation and Test Specification Development. Report SAND2020-10224, Sandia National Lab. (SNL-NM), Albuquerque (2020)CrossRef Sisemore, C., Babuska, V., Flores, R.: Multi-axis Resonant Plate Shock Testing Evaluation and Test Specification Development. Report SAND2020-10224, Sandia National Lab. (SNL-NM), Albuquerque (2020)CrossRef
4.
go back to reference Schoenherr, T., Soine, D., Witt, B.: Experimental modal analysis of a resonant plate during a mid-field pyroshock replication test. In: Sensors and Instrumentation, Aircraft/Aerospace and Dynamic Environments Testing, vol. 7. Springer (2022) Schoenherr, T., Soine, D., Witt, B.: Experimental modal analysis of a resonant plate during a mid-field pyroshock replication test. In: Sensors and Instrumentation, Aircraft/Aerospace and Dynamic Environments Testing, vol. 7. Springer (2022)
5.
go back to reference Schoenherr, T., Soine, D., Witt, B.: Testing, Characterization, and Modeling of the Resonant Plate Test Environment. Report SAND2022-0780, Sandia National Lab. (SNL-NM), Albuquerque (2022)CrossRef Schoenherr, T., Soine, D., Witt, B.: Testing, Characterization, and Modeling of the Resonant Plate Test Environment. Report SAND2022-0780, Sandia National Lab. (SNL-NM), Albuquerque (2022)CrossRef
Metadata
Title
Evaluation of a Multiaxis Shock Fixture Concept
Authors
David E. Soine
Tyler F. Schoenherr
Jack D. Heister
Copyright Year
2024
DOI
https://doi.org/10.1007/978-3-031-34930-0_6