Force reconstruction using the sum of weighted accelerations technique -- Max-Flat procedure

Technical Report · Fri Dec 31 04:00:00 EST 1993

DOI:https://doi.org/10.2172/10115211· OSTI ID:10115211

Carne, T G; Mayes, R L; Bateman, V I

Force reconstruction is a procedure in which the externally applied force is inferred from measured structural response rather than directly measured. In a recently developed technique, the response acceleration time-histories are multiplied by scalar weights and summed to produce the reconstructed force. This reconstruction is called the Sum of Weighted Accelerations Technique (SWAT). One step in the application of this technique is the calculation of the appropriate scalar weights. In this paper a new method of estimating the weights, using measured frequency response function data, is developed and contrasted with the traditional SWAT method of inverting the mode-shape matrix. The technique uses frequency response function data, but is not based on deconvolution. An application that will be discussed as part of this paper is the impact into a rigid barrier of a weapon system with an energy-absorbing nose. The nose had been designed to absorb the energy of impact and to mitigate the shock to the interior components.

• Research Organization: Sandia National Labs., Albuquerque, NM (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 10115211
• Report Number(s): SAND--93-2550C; CONF-940146--2; ON: DE94005254; BR: GB0103012
• Country of Publication: United States
• Language: English

Related Subjects

45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
450000
CALCULATION METHODS
DEFORMATION
EXPERIMENTAL DATA
IMPACT SHOCK
IMPACT TESTS
MECHANICAL VIBRATIONS
MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
MITIGATION
MOCKUP
RESPONSE FUNCTIONS
SHOCK ABSORBERS
WEAPONS