摘要
综合考虑时变啮合刚度、轴承刚度、综合传递误差、阻尼等影响因素,建立了TBM刀盘系统的平移-扭转-倾覆多自由度耦合动力学模型.基于实际工程项目的刀盘系统参数求解固有频率和振型,并研究系统参数对固有频率的影响及敏感度问题.研究结果表明,刀盘系统低阶固有频率为57和61 Hz,对应振型分别为电机和小齿轮的纯扭转振动及刀盘和大齿圈平移倾覆耦合振动,刀盘分体的切向支撑刚度和质量的敏感区间分别为3~4 GN/m和19~23 t.
A multi-degree-of-freedom coupling dynamic model with translation-rotation-bending directions of a TBM cutterhead system was established with considering time-varying meshing stiffness,bearing stiffness,transmission errors and damping,etc. Based on parameters of an actual project,the natural frequencies and corresponding vibration modes were calculated. The influence of natural frequencies and sensitivities with respect to system parameters were investigated. The results showed that the low natural frequencies are 57 and 61 Hz,respectively. The natural vibration modes are pinions-motors rotational mode and translational-overturning coupled mode of cutterhead with inner ring gear correspondingly. Meanwhile, the sensitive range of tangential stiffness about cutterhead pieces is 3 ~ 4 GN / m and the mass sensitive range is 19 ~ 23 t,respectively.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2015年第4期546-550,共5页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金资助项目(51005033
51375001)
国家重点基础研究发展计划项目(2013CB035400)
辽宁省科技攻关项目(2011220031)
中央高校基本科研业务费专项资金资助项目(DUT13LK14)
关键词
刀盘系统
多自由度耦合
固有特性
灵敏度
参数影响
cutterhead system
multi-degree-of-freedom coupling
natural characteristics
sensitivity
parameter influence
