摘要
为明确不同工况下TBM主机振动耦合规律,基于Adams软件,依据其结构装配关系和力传递关系,对TBM主机节点进行重新划分,引入非线性弹簧元件对油缸、轴承和齿轮啮合进行非线性等效,建立TBM主机非线性耦合动力学模型,并详细计算结构本身的刚度和结构间的非线性连接刚度。根据掘进地质条件,定义了全推力、上软下硬和转弯3种典型刀盘载荷,并对3种载荷下的振动进行分析。结果表明:(1)在全推力工况下,主机关键部件的振动最大,为低频的受迫振动;机头架的振动横向和纵向受到齿轮的耦合作用,在150 Hz左右的频率上存在耦合振动。(2)刀盘轴向最大加速度幅值为2.5g,从刀盘到主梁,机头架的振动衰减了约25%,主梁前段振动衰减了约55%,与已有全推力工况下实测结果相接近,证实了仿真计算的正确性。(3)根据对上软下硬和转弯纠偏2种典型工况的振动规律分析,刀盘的轴向力和速度分别减少约40%和80%。
In order to clarify the vibration coupling laws of TBM main body under different working conditions,the nodes of TBM main body are divided according to their relationships with structural assembly and force transfer based on ADAMS.By introducing non-linear springs,the nonlinear equivalent is carried out on oil cylinder,bearing and gear mesh,the nonlinear coupling dynamic model of TBM main body is established,and the stiffness of the structure and the nonlinear connection stiffness between the structures are calculated in detail.Three typical cutterhead loads,i.e.full thrust,upper-soft and lower-hard and turning,are defined according to geological conditions,and the vibrations under the three loads are analyzed.The results show that:(1)Under full thrust condition,the vibration of the key components of the main body is the largest,which is the low-frequency forced vibration;the vibration of the head frame is coupled by the gears horizontally and longitudinally,and the coupling vibration exists at a frequency of about 150 Hz.(2)The maximum axial acceleration of cutterhead reaches 2.5g,the vibration of head frame is reduced by about 25%from cutterhead to main beam,and the vibration of the front section of main beam is reduced by about 55%,which is close to the actual measured results under the existing full thrust condition and verifies the feasibility of the simulated calculation.(3)According to the analytical results of the vibration laws under the two typical working conditions,i.e.upper-soft and lower-hard and turning,the axial acceleration of the cutterhead decreases by about 40%and 80% respectively.
作者
王旭龙
朱晔
WANG Xulong;ZHU Ye(School of Mechanical Engineering,Dalian Jiaotong University,Dalian 116028,Liaoning,China;School of Automobile and Transportation,Tianjin University of Technology and Education,Tianjin 300222,China)
出处
《隧道建设（中英文）》
北大核心
2020年第9期1300-1306,共7页
Tunnel Construction
