Department of Engineering Mechanics Shijiazhuang Tiedao University Shijiazhuang 050043 China;
Department of Engineering Mechanics Shijiazhuang Tiedao University Shijiazhuang 050043 China;
School of Mathematics and Science Xiamen University Xiamen 361005 China;
Department of Engineering Mechanics Shijiazhuang Tiedao University Shijiazhuang 050043 China;
Department of Engineering Mechanics Shijiazhuang Tiedao University Shijiazhuang 050043 China;