液压支架顶梁结构偏载工况下的静力学分析及结构优化

Static Analysis and Structural Optimisation of Hydraulic Support Roof Beam Structure under Partial Load Condition

以ZY29000/45/100D型液压支架的顶梁结构为研究对象,基于有限元方法对顶梁偏载工况下的静力学情况进行分析。结果发现,顶梁结构出现了明显的应力和变形集中现象,特别是多个位置应力较大,应力最大值达到了966 MPa,超过了材料的屈服极限690 MPa,是导致顶梁容易出现断裂、变形的原因。通过增加筋板厚度并设置斜向加强筋的方式对顶梁进行结构优化,提升其强度和刚度。结果使得相同工况下其应力最大值和变形最大值分别降低了41.9%和26.76%。通过一年时间的实践应用,发现优化后的顶梁结构达到了预期效果。

Taking the roof beam structure of ZY29000/45/100D hydraulic support as the research object,the static mechanical condition of the roof beam under partial load condition was analysed based on the finite element method.It is found that the roof beam structure has obvious stress and deformation concentration phenomenon,especially the stress is large at several positions,and the maximum stress value reaches 966 MPa,which exceeds the material yield limit of 690 MPa,and it is the reason that the roof beam is prone to fracture and deformation.The structural optimisation of the top beam was carried out by increasing the thickness of the fascia plate and setting diagonal reinforcement to improve its strength and stiffness.As a result,the maximum stress and the maximum deformation under the same working condition were reduced by 41.9%and 26.76%,respectively.Through one year's practical application,it is found that the optimised roof beam structure achieves the expected effect.