Seismic source-region elastic calculations on KDYNA

Technical Report · Tue Mar 01 00:00:00 EST 1994

DOI:https://doi.org/10.2172/10176402· OSTI ID:10176402

Clarke, D B

This paper summarizes the results of source-region simulations on the KDYNA hydrodynamics code. The source was a pressure-step function in a 40-m-radius cavity 500 m below a free surface. The problem of a driven cavity in an elastic material was chosen as a test and calibration problem for two reasons. First, the driven cavity is a model for an underground explosion. Secondly, the availability of analytical methods for waves in elastic solids means that alternate calculational paths exist for calculating the distant signals from the cavity. Data from an array of sensor points roughly 1 km from the source were saved and passed to Howard Patton and Keith K. Nakanish for input to a NMTS (Normal Mode Time Series) code. The data consisted of the time histories (0 to 2 s) of the radial and axial velocities and the radial, axial, and shear components of the stress at each sensor point. The NMTS code will use the input to predict the signals in the far field (e.g., 300 km) from the explosion source. This elastic KDYNA calculation provides a complete and satisfactory simulation for input to the NMTS code and for comparison with other calculational methods.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 10176402
• Report Number(s): UCRL-ID-116980; ON: DE94017490; TRN: 94:016702
• Resource Relation: Other Information: PBD: Mar 1994
• Country of Publication: United States
• Language: English

Related Subjects

45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL PROTECTION
UNDERGROUND EXPLOSIONS
COMPUTERIZED SIMULATION
GROUND MOTION
SEISMIC EFFECTS
NUCLEAR EXPLOSION DETECTION
SEISMIC DETECTION
K CODES
THEORETICAL DATA
SEISMIC SOURCES
SEISMIC WAVES
VERIFICATION
TREATIES
450300
350300