Timoshenko梁的基于样条的微分求积法的高阶非线性振动分析SP-146801 VL-14 AB-SN-1070-9622 UR-https://doi.org/10.1155/2007/146801 DO-10.1155/2007/146801 JF-冲击和振动PB-IOS压力机KW-ER-