A methodology for defining shock tests based on shock response spectra and temporal moments

Conference · Sat Nov 01 04:00:00 EST 1997

OSTI ID:548713

Cap, J S; Smallwood, D O ^[1]

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1. Sandia National Labs., Albuquerque, NM (United States). Mechanical and Thermal Environments Dept.

Defining acceptable tolerances for a shock test has always been a problem due in large part to the use of Shock Response Spectra (SRS) as the sole description of the shock. While SRS do contain a wealth of information if one knows what to look for, it is commonly accepted that different agencies can generate vastly different time domain test inputs whose SRS all satisfy the test requirements within a stated tolerance band. At an even more basic level, the laboratory test specifications often fail to resemble the field environment even though the SRS appear to be similar. A concise means of bounding the time domain inputs would be of great benefit in reducing the variation in the resulting shock tests. This paper describes a methodology that uses temporal moments to improve the repeatability of shock test specifications.

• Research Organization: Sandia National Labs., Albuquerque, NM (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 548713
• Report Number(s): SAND--97-1480C; CONF-971164--; ON: DE98001138; BR: GC0403000
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
LABORATORY EQUIPMENT
MECHANICAL TESTS
MECHANICAL VIBRATIONS
RESPONSE FUNCTIONS
SHOCK WAVES
SPECIFICATIONS