13th International LS-DYNA Users Conference

Authors: Phani Adduri, Juan Leiva, Gary Quinn, Brian Watson
Publication Date: June 8-10, 2014

This paper demonstrates a design system to efficiently perform optimization based on responses
computed from multiple LS-DYNA analyses while also taking into consideration the linear
loading conditions such as the ones for NVH and Static responses. The proposed design system,
ESLDYNA, is based on the Equivalent Static Load (ESL) method, which requires the iterative
process of non-linear structural analysis (LS-DYNA) and linear structural analysis and
optimization (GENESIS). Unlike general purpose optimization software packages, it does not
require a large number of analysis calls even for problems with large numbers of design
parameters. Therefore, large-scale optimization techniques, such as topology, topometry and
topography, can be easily employed. Several examples using different optimization techniques
will be presented. One of the examples will include optimizing the design for frontal crash,
normal modes and static loading conditions simultaneously.