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

Force reconstruction using the sum of weighted accelerations technique -- Max-Flat procedure 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.
Authors: ; ;
Publication Date:
OSTI Identifier:OSTI ID: 10115211
Report Number(s):SAND--93-2550C; CONF-940146--2
ON: DE94005254; BR: GB0103012; TRN: AHC29403%%62
DOE Contract Number:AC04-94AL85000
Resource Type:Technical Report
Resource Relation:Conference: 12. international modal analysis conference,Honolulu, HI (United States),31 Jan - 3 Feb 1994; Other Information: PBD: [1993]
Research Org:Sandia National Labs., Albuquerque, NM (United States)
Sponsoring Org:USDOE, Washington, DC (United States)
Country of Publication:United States
Language:English
Subject: 45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE; WEAPONS; IMPACT SHOCK; RESPONSE FUNCTIONS; CALCULATION METHODS; MITIGATION; SHOCK ABSORBERS; IMPACT TESTS; DEFORMATION; MECHANICAL VIBRATIONS; EXPERIMENTAL DATA; MOCKUP 450000; MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE