Constructing a Concept Vehicle Structure Optimized for Crashworthiness 2019-01-0613
Multi-disciplinary optimization (MDO) of a vehicle structure at the earliest stages of design is critical as OEMs are pressed to reduce the design time to respond to various demands from market. MDO for the three essential areas of performance of the vehicle structure (NVH, Crash, and Durability) needs the throughput for each of the key disciplines to be approximately in the same range of turn-around time. However, crashworthiness simulation typically takes significantly longer than the others; making it difficult to include crashworthiness in the MDO. There have been many approaches to address crash simulation in a shorter time. Lumped mass-spring method is one of the approaches but has not been widely accepted since it did not replicate the crash behavior accurately and it is hard to convert the results into real design of the structural components. In the paper, a workflow is presented to combine the lumped mass-spring method with paramet-ric optimization to provide solutions to the challenges mentioned.