Application and implementation of transient algorithms in computer programs

Conference · Mon Jul 01 00:00:00 EDT 1985

OSTI ID:5377009

Benson, D J

This presentation gives a brief introduction to the nonlinear finite element programs developed at Lawrence Livermore National Laboratory by the Methods Development Group in the Mechanical Engineering Department. The four programs are DYNA3D and DYNA2D, which are explicit hydrocodes, and NIKE3D and NIKE2D, which are implicit programs. The presentation concentrates on DYNA3D with asides about the other programs. During the past year several new features were added to DYNA3D, and major improvements were made in the computational efficiency of the shell and beam elements. Most of these new features and improvements will eventually make their way into the other programs. The emphasis in our computational mechanics effort has always been, and continues to be, efficiency. To get the most out of our supercomputers, all Crays, we have vectorized the programs as much as possible. Several of the more interesting capabilities of DYNA3D will be described and their impact on efficiency will be discussed. Some of the recent work on NIKE3D and NIKE2D will also be presented. In the belief that a single example is worth a thousand equations, we are skipping the theory entirely and going directly to the examples.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5377009
• Report Number(s): UCRL-92985; CONF-8506160-1; ON: DE85015396
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420100* -- Engineering-- General Engineering-- (-1987)
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
ALGORITHMS
COMPUTER CODES
COMPUTER GRAPHICS
COMPUTER-AIDED DESIGN
COMPUTERIZED SIMULATION
ENGINEERING
FINITE ELEMENT METHOD
IMPACT TESTS
MATERIALS TESTING
MATHEMATICAL LOGIC
MATHEMATICAL MODELS
MECHANICAL ENGINEERING
MECHANICAL TESTS
NUMERICAL SOLUTION
SIMULATION
TESTING