Article History
Received: 13 May 2019
Revised: 15 October 2019
Accepted: 15 October 2019
First Online: 29 February 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The optimization system developed consists of in-house C programs and MSC/NASTRAN for FE analyses. Their executions are controlled with “Batch program” on Windows OS until the convergence. For the benchmark calculation by readers, we will provide NASTRAN model data of Figs. and we used in this paper.