NDLI: Analytical Shock Response of a Transversely Point-Loaded Linear Rectangular Plate

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Hampton, R. David Kip, P. Nygren Ting, H. Li
Copyright Year	2006
Abstract	Ballistic shock, the strong vibrations that propagate through a vehicle structure after a ballistic impact, can damage electronic components that are mounted on various interior locations of the vehicle. To protect onboard critical electronic components from ballistic shock damage, predicted shock response spectra (SRS) are used as design guidelines in the selection of shock isolation devices. Current technology to predict shock response intensity at component mounting locations includes Finite Element Analysis, Statistical Energy Analysis, and various other modeling approaches. The Army Research Laboratory is implementing a process to determine component damage probability based on a numerical modal superposition method. This process allows detailed modeling of an entire vehicle (including instrumentation racks) but requires months of effort to perform skillful FEA modeling. Such an expenditure is acceptable only for unique high value vehicles, and is impractical for analysis of many vehicles. Therefore it is desirable to investigate alternative shock analysis methods that are simple and general (i.e., independent of specific vehicle configurations). Although such methods could entail reduced accuracy, for situations that are applicable they would eliminate the need of time-consuming finite element modeling, and could used in a variety of vehicles. As such, the methods could be used for “screening” for rapid identification of potential shock-damage issues. If necessary, further detailed analysis could be accomplished subsequently. When an armored vehicle is subjected to a non-perforating large-caliber munitions impact or blast, direct mounted components that are near the impact location will always risk the highest damage potential. Live fire ballistic tests and laboratory experiments as well as numerical modeling have proved this observation. The research presented in this paper develops, from an exact continuous model, a constant- and lumped-parameter, linear matrix model of a homogeneous, rectangular, simply-supported plate subject to transverse ballistic shock. The model is provided in a form suitable for eigen-analysis intended to yield kinematic responses for SRS determination. Damping can be included in either Rayleigh or modal form. The enabled “same-plate” shock analysis, while not encompassing an entire military vehicle, would treat the most severe cases of shock response, for components mounted directly on the impacted plate.
Starting Page	479
Ending Page	486
Page Count	8
File Format	PDF
ISBN	0791842509
DOI	10.1115/ESDA2006-95608
e-ISBN	0791837793
Volume Number	Volume 3: Dynamic Systems and Controls, Symposium on Design and Analysis of Advanced Structures, and Tribology
Conference Proceedings	ASME 8th Biennial Conference on Engineering Systems Design and Analysis
Language	English
Publisher Date	2006-07-04
Publisher Place	Torino, Italy
Access Restriction	Subscribed
Subject Keyword	Damping Army Vibration Computer simulation Electronic components Probability Instrumentation Risk Modeling Vehicles Design Munitions Spectra (spectroscopy) Fire Kinematics Military vehicles Shock isolation Finite element analysis Shock (mechanics) Damage
Content Type	Text
Resource Type	Article

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