Continuum method based on rigidity equivalent principle,mass equivalent principle and concentrated parameter principle are used to transform the horizontal bar to a continuous medium model which is made up of some straight beams,mass-points,curved beams in a especial linking mode.The vibration characteristics of lauching tower' s pendulum system is calculated by means of Muhibody System Transfer Matrix Method (MSTMM).The results obtained show good agreements,which proves the validity of the equivalent model and the calculation of its vibration characteristics.%综合运用刚度等效原理、质量等效原理、集中参量等思想将水平杆处理为由阶梯梁、集中质量、无质量曲梁结构按一定顺序相互固结而成的等效连续介质模型.在该模型的基础上运用多体系统传递矩阵法对摆杆系统进行自振特性的相关计算.计算结果与试验结果基本吻合,验证了等效模型的适用性和自振特性算法的正确性.
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