库外固定式挡车器联接螺栓强度分析
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摘要
本文归纳总结螺栓强度校验的理论计算方法,然后以某货运轨道末端的库外固定式挡车器为研究对象,采用空间六面体单元和接触单元组合的方式创建了该挡车器结构的有限元模型,并在1581 KN的压缩载荷工况下进行了接触非线性计算。针对轴向应力接近许用应力的计算结果,提出减小预紧力并增大螺栓垫片接触面积的改进方案。计算结果表明,改进方案的最大轴向应力降低了34. 8%,最大剪切应力降低了16. 5%,有效增加了安全裕量。
This paper first summarizes the theoretical calculation method for bolt strength verification. Then take the external fixed-type blocker at the end of a freight track as the research object,Using a combination of spatial hexahedral elements and contact elements to Created a finite element model of the structure of the blocker. The contact nonlinearity calculation was carried out under the compression load condition of 1581 KN. Based on the calculation results,although the strength condition is satisfied,the axial stress is close to the allowable stress. An improved solution for reducing the preload force and simultaneously increasing the contact area of the bolt spacer is proposed. The calculation results show that the maximum axial stress of the improved scheme is reduced by 34. 8%,and the maximum shear stress is reduced by 16. 5%,which effectively increases the safety margin.
This paper first summarizes the theoretical calculation method for bolt strength verification. Then take the external fixed-type blocker at the end of a freight track as the research object,Using a combination of spatial hexahedral elements and contact elements to Created a finite element model of the structure of the blocker. The contact nonlinearity calculation was carried out under the compression load condition of 1581 KN. Based on the calculation results,although the strength condition is satisfied,the axial stress is close to the allowable stress. An improved solution for reducing the preload force and simultaneously increasing the contact area of the bolt spacer is proposed. The calculation results show that the maximum axial stress of the improved scheme is reduced by 34. 8%,and the maximum shear stress is reduced by 16. 5%,which effectively increases the safety margin.
引文
[1]眭凯.“一带一路”战略形势下挡车器产品开拓国际市场的思考[J].上海铁道科技,2017(4):136-139.
[2]曹亮,李俊玺,曲铭.城市轨道交通液压缓冲滑动式车挡设计研究[J].铁道勘察,2016(2):107-110.
[3]王会发,杜锦涛,刘继波.浅谈地铁挡车器的合理设置[J].铁道车辆,2016(2):30-32,6.
[4]马涛,罗慧强,李琪.基于ANSYS和VDI2230标准的永磁直驱风力发电机高强螺栓强度分析[J].内燃机与配件,2018(15):75-77.
[5]徐美晨,张霖.库外固定式挡车器测绘及非线性有限元分析[J].长春师范大学学报,2018(2):198-200.
[6]闫琳,任娜,康建伟.浅析预紧力对螺栓强度的影响[J].汽车实用技术,2018(17):98-99.
[7]R M Hizam,Allan C Manalo,Warna Karunasena,et al. Effect of bolt threads on the double lap joint strength of pultruded fibre reinforced polymer composite materials[J]. Construction and Building Materials,2018(181):185-198.
[2]曹亮,李俊玺,曲铭.城市轨道交通液压缓冲滑动式车挡设计研究[J].铁道勘察,2016(2):107-110.
[3]王会发,杜锦涛,刘继波.浅谈地铁挡车器的合理设置[J].铁道车辆,2016(2):30-32,6.
[4]马涛,罗慧强,李琪.基于ANSYS和VDI2230标准的永磁直驱风力发电机高强螺栓强度分析[J].内燃机与配件,2018(15):75-77.
[5]徐美晨,张霖.库外固定式挡车器测绘及非线性有限元分析[J].长春师范大学学报,2018(2):198-200.
[6]闫琳,任娜,康建伟.浅析预紧力对螺栓强度的影响[J].汽车实用技术,2018(17):98-99.
[7]R M Hizam,Allan C Manalo,Warna Karunasena,et al. Effect of bolt threads on the double lap joint strength of pultruded fibre reinforced polymer composite materials[J]. Construction and Building Materials,2018(181):185-198.