用有限元法 ALGOR通用程序的子空间迭代法分析了下端固支的捆绑式运载火箭横向固有振动特性。计算包括助推器的上、下接头与芯级箭体固接和下接头固接而上接头铰接两种连接情况。实验结果表明 ,该方法是有效的 The finite element method ALGOR general program subspace iterative method was used to analyze the characteristics of the lateral natural vibration of the bundled launch vehicle supported by the lower end. Calculations include the booster’s upper and lower joints and the core-level rocket body fixed and the lower joint fixed joints on the two connections. Experimental results show that this method is effective