中文摘要：

隧道掘进机刀盘在掘进过程中承受高强度冲击载荷,振动十分剧烈,导致关键构件过早损伤失效,有必要在设计阶段研究刀盘系统的振动特性及其参数影响。为此,在已有TBM刀盘系统多自由度耦合动力学模型的基础上,通过求解各阶固有频率和振型,得到各构件的模态能量分布,进一步区分各阶模态振型,识别模态敏感参数,并分析了敏感参数对前10阶频率的影响。研究结果表明,刀盘系统模态振动主要集中在中间阶,且纯扭转振型对应的固有频率为57 Hz;模态能量能够区分各阶振型,且和常规的振型分析结论一致;第2～10阶固有频率主要受小齿轮转动惯量和输入端扭转刚度的影响,且这两个值分别取原始方案的1.1倍和1.3倍时,系统振动特性较稳定。

英文摘要：

A tunnel boring machine （TBM） cutterhead endures heavy impact loads during excavation. It vibrates fiercely and causes vital components to fail early. Therefore, it is indispensable to study the vibration characteristics of the cutterhead and the influence of mass and stiffness parameters at the design stage. For this purpose, the modal energy distributions of each component were obtained by solving natural frequencies and vibration modes of each order by using the coupling dynamics model of the TBM cutterhead system. Next, the modal vibration modes of each order were distinguished, sensitive modal parameters were identified, and their influences on the first 10 frequencies were analyzed. The results show that the modal vibration of the cutterhead system is focused mainly in the medial orders, and the natural frequency corresponding to the pure torsional vibration mode is 57 Hz. Each vibration mode can be distinguished by its modal energy, which is consistent with conventional vibration mode analysis. In addition, natural frequencies of orders 2-10 are affected mainly by pinion inertia and torsional stiffness of the input terminal. The vibration characteristics are more stable when the two values are equal to 1.1 and 1.3 times those in the original scheme ,respectively.