1. National Innovation Center of High Speed Train,Qingdao 370214,Shandong,China;2. Hangcai Guochuang(Qingdao)High-speed Railway Material Research Institute Co. ,Ltd. ,Qingdao 370214,Shandong,China; 3. Hangzhou Innovation Institute,Beihang University,Hangzhou 310051,Zhejiang,China