Dynamic Response Analysis of Gear Rack Rig Hoisting System

The dynamic characteristic of gear rack rig hoisting system is an important factor in affecting its working performance.On the basis of dynamic analysis,the single gear and rack meshing dynamical model and the dynamical model of the hoisting system with the multiple gear and rack meshing are established.The effects of the time varying meshing stiffness of gear on the system dynamic response are determined.Through unite-modeling method of Solidwork and ADAMS,the time varying law of gear rack contact force and gear speed under different hoisting system working conditions are analyzed.The result shows that the output speed of hoisting system gear changes over time due to the internal incentives,and has the synchronism impact peak with engaging force.Given the same working condition,the amplitude is greater during tripping in than in tripping out.Both the curve amplitude of gear speed and the contact force increase during tripping in.The study lays a foundation for structure optimization and reliability design of gear rack rig hoisting system.