发动机前端附件带传动系统固有频率算法的研究

A Research on the Calculation of the Natural Frequency of Belt Drive System for Engine Front End Accessories

为分析发动机前端附件带传动系统的固有振动特性,对一种Holzer型双循环迭代法进行了研究。针对多带轮系统给出了双循环迭代算法的计算过程,推导了内循环迭代收敛的充要条件;并考虑内循环迭代发散的可能性而采用直接法代替内循环迭代,得到了一种混合算法。最后通过两个算例表明,所提出的混合算法能准确有效地计算系统的固有频率。

A Holzer-type two loop iteration scheme is investigated for analyzing the natural vibration charac-teristics of the engine front end accessory belt drive. A calculation process of two loop iteration algorithm is given for multi-pulley system, and the necessary and sufficient condition for the convergence of inner loop iteration is derived. With consideration of the possibility of divergence in inner loop iteration, it is then replaced by direct solution tech-nique to form a hybrid algorithm. Finally it is indicated by two calculation examples that the hybrid algorithm pro-posed can accurately and effectively calculate the natural frequency of the system.