2013年西南交通大学博士研究生创新基金和中央高校基本科研业务费专项资金、"十一五"国家科技支撑计划2009 BAG12A01-C09;高速铁路基础研究联合基金U1234208;The project was supported by the 2013 Doctoral Innovation Funds of Southwest Jiaotong Universtiy and the Fundamental Research Funds for Central Univerities,the National Key Technology R & D Program of China2009 BAG12A01-C09;the High-Speed Railway Basic Research Fund Key ProjectU1234208