General Research And Design Of Bogie For Railway Maintenance Material Reserve Vehicle

With the high-speed development of railway construction and increase of new lines,the maintenance workload of the line maintenance department of the various road bureau is increasing,meanwhile,the number of construction persoinel is increasing.The problem is that out of operation cycle spends a lot of time,the required tools and maintenance materials are also large.In order to improve the construction efficiency and the maintenance of the line,it is necessary to design and develop a project bogie that can be applied to railway maintenance material reserve vehicle.There is a big difference between the axle load under the condition of empty vehicle and heavy vehicle for railway maintenance material reserve vehicle,and has high requirements of dynamic performance in operation.On the basis of understanding the basic form of bogies in railway engineering at home and abroad,this paper designs a kind of railway engineering bogie with variable stiffness supprot stucture by referring to the design concept of variable stiffness support system of stuck bogies.The bogies mentioned in this paper are in the form of non-guide-frame pull bar type axle box,with steel spings of static deflection around 110mm for one-set of support,and rubber-metal pads of around 14mm for two-set of support.Based on the model calculation of the simpack software,the paper evaluates the stability and safety control standard of the vehicle operation,first calculate the empty vehicle vertical stability than to the state standards about 20%qualified line,and optimizes the transformation stiffness forms and parameters of the bogie,through the second modeling calculation,empty vertical steady performance is improved by about 27%,the lateral stability parameters increased by 22%,the results show that all calculation results can meet the requirements of the vehicle to run stability and safety.Study shows that the initial design adopts two-stage variable stiffness,but not so big empty static and dynamic load coefficient when sping support stiffness is still the same as the heavy vehicle,and the stiffness is too large can causes the stability performance to get bad.The optimized working conditon of a suspension in the empty prolapse to stiffness was 38%lower than the first design,the static deflection increseas 16mm;in the case of heavy vehicle,the droop stiffness was reduced by 6%,and the static deflection was increased by 21mm.In the operation of the 5 stage line,and there is no large situation in the range of the requirements,the stability performance is greatly improved.In the end,through dynamics experimental verification that verify design and development of bogie for railway maintenance material reserve vehicle can meet requirements of the use,which is the most basic support for development of the material reserve vehicle,and also provides a certin reference for design and development of the engineering vehicle for special function requirement.