Stastic Strength And Dynamic Analysis Of The Frame Of GMC-96B Rail Grinding Vehicle A

The rail grinding vehicle is used to grind the running surface of the rail to eliminate irregularities,cracks on the surface of rail and restore the contour of the rail.The investigation found that most of the domestically developed rail grinding vehicles will have many problems such as unstable when runing,deflection of frame excessived and appear cracks on the frame after 5 to 7 years of use.The main reasons are the unreasonable design of the structure,the failure of the strength,the failure of the rigidity and the damage to the frame during the assembly of the vehicle.In addition,the bogie plays an important role in the rail grinding vehicle.As the main load-bearing component of the grinding vehicle,it is particulariy dangerous if the components of the bogie are damaged.As the main part of the bogie,the performance of the frame will directly affect the performance and safety of the vehicle.Therefore,it is extremely important to analyze and study the strength and dynamics of the grinding vehicle frame.In this paper,the GMC-96 B rail grinding vehicle A is used as the research model.The three-dimensional drawing software Solidworks is used for modeling.And the analysis software Ansys Workbench is used as the research platform.Three aspects are analyzed including static strength analysis,modal analysis and explicit dynamic analysis.And the following conclusions can be drawn:(1)In the 15 kinds of static strength analysis of the vehicle A frame,the maximum stress is 100.17 MPa,which is far lower than the allowable stress of Q355 NE material.So the vehicle A frame meets the static strength requirements.(2)After the 12-order modal analysis,the fundamental vibration frequency of the vehicle A frame is 60.948 Hz,which is much higher than the external excitation frequency and the natural vibration frequency of the vehicle A body when the grinding vehicle is running at a high speed or low constantly speed.Resonance phenomenon doesn’t occur.And the frame has a good torsional stiffness in the vertical direction,which is helpful to reduce the ups and downs when the vehicle running on the uneven road.It also has a good lateral stiffness and longitudinal stiffness,which is helpful for frame A to withstand lateral and longitudinal loads.So the vehicle A frame meets stiffness requirements.(3)When the body collides with the frame of vehicle A at a speed of 130mm/s,the maximum stress experienced by the vehicle A frame is slightly higher than the allowable stress of the Q355 NE material.And the maximum take-off and landing speed of the main hook of the double-beam bridge crane is 267mm/s,which is higher than the safe speed of the vehicle A body to descend.Therefore,during the "falling" process,the speed of the vehicle A body can’t exceed130mm/s to ensure that the vehicle A frame will not be damaged.