基金Project(51075132)supported by the National Natural Science Foundation of ChinaProject(9451806001002350)supported by Guangdong Science Fund+2 种基金Project(30815007)supported by the Science Fund of State Key Laboratory of Advanced Design and Manufacturing for Vehicle BodyProject(09JJ1007)supported by Hunan Science Fund for Distinguished Young ScholarsProject(20090161110027)supported by the Doctoral Fund of Ministry of Education of China