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 nonlinear 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, uppersoft and lowerhard 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
lowfrequency 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. uppersoft
and lowerhard and turning, the axial acceleration of
the cutterhead decreases by about 40% and 80% respectively.
WANG Xulong
,
ZHU Ye
. Coupled Vibration Analysis of Fullface
TBM Main Body Based on ADAMS[J]. Tunnel Construction, 2020
, 40(9)
: 1300
-1306
.
DOI: 10.3973/j.issn.2096-4498.2020.09.008
