Application of Strain Energy on BIW Mode Optimization Guangbao Chang, Huifang Zhao, Jingqiang Liang, Juncheng Lv, Shuyang Li and Xiaobo Ni MATEC Web of Conferences, 22 (2015) 03015 Published online: 09 July 2015 DOI: 10.1051/matecconf/20152203015