100%低地板有轨电车新型复轨器强度分析

Strength Analysis and Experimental Study on the New Rail Re-Railer of 100% Low-Floor Tram

摘要: 以HT250、40Cr两种材质的新型复轨器为研究对象，在ABAQUS中建立了其有限元模型，控制两者边界条件和载荷工况相同的情况下，仿真分析得出HT250复轨器最大接触应力为600 MPa，超出了其许用应力。40Cr复轨器最大接触应力为818 Mpa，基于静力安定理论计算出40Cr复轨器的安定极限为1812 Mpa远大于仿真计算的最大接触应力，并采用E-N法在FE-SAFE计算其疲劳寿命为331,895次大于设计之初对其使用寿命的要求。之后进行了现场试验，HT250复轨器在试验中直接破损，40Cr复轨器复轨过程高效且平顺，完成复轨后40Cr复轨器没有破损仅在表面留下轻微变形，验证了仿真计算的正确性。

Abstract: Taking HT250rerailer and 40Cr rerailer as the research object, the finite element model of HT250 rerailer and 40Cr rerailer is established in ABAQUS. Under the same boundary conditions and load conditions, the simulation analysis shows that the maximum contact stress of HT250 rerailer is 600 MPa, which exceeds its allowable stress. The maximum contact stress of the 40Cr rerailer is 818 Mpa. Based on the static stability theory, the stability limit of the 40Cr rerailer is 1812 Mpa, which is much larger than the maximum contact stress calculated by simulation, The fatigue life calculat-ed by E-N method in FE-SAFE is 331,895 times, which is greater than the requirement of its service life at the beginning of design. After that, the field test was carried out. The HT250 rerailer was di-rectly damaged in the test, and the rerailing process of the40 Cr rerailer was efficient and smooth. After the rerailing, the 40Cr rerailer was not damaged and only left a slight deformation on the sur-face, which verified the correctness of the simulation calculation.