动力猫道推块液压缸杆稳定性的研究

针对动力猫道推块液压缸杆使用过程中容易产生失稳的现象,分析了缸杆的受力特点及其失稳原因。在失稳临界力理论计算公式推导过程中,针对欧拉公式存在的不足,应用了修改后的边界条件,并综合考虑了液压缸杆安装及导向系数的影响,得出了推块液压缸杠临界力的计算公式。同时针对现场使用的某型号推块液压缸杆在简化其试验试件的基础上进行了稳定性试验研究。通过对比试验研究得出的试件临界力与理论计算的临界力,说明了计算公式的正确性。最后,采用有限元软件Workbench对液压缸杆进行了稳定性数值模拟,其结果显示理论计算的临界力与有限元分析的结果基本一致,进一步说明了计算公式的正确性。

Research on the Stability of the Hydraulic Cylinder Rod of the Power Catwalk Track Mechanism

In view of the phenomenon of instability in the use of the hydraulic cylinder rod of the power catwalk track mechanism,analyzed the load characteristics and the reasons for instability of the hydraulic cylinder rod. In view of the deficiency of the Euler formula ,considered the modified boundary conditions and the influence of coefficient of installation and guide ring in the theoretical derivation of calculation formula for the critical load of the hydraulic cylinder rod . The stability testing of the hydraulic cylinder rod were carried out after simplified the test specimen of the block hydraulic cylinder rod. Contrast critical loads between the experimented results and the theoretical calculation to illustrates the correctness of the calculation formula. At the same time ,the numerical simulation on the stability of the hydraulic cylinder rod were analyzed by .used finite element software Workbench,and the critical loads of the theoretical calculation and through the finite element analysed almost the same,which further illustrates the validity of the calculation formula.