小型顶管机刀盘设计与有限元分析

摘要

顶管工程被认为是非开挖工程施工的一种工艺,顶管机刀盘作为油气管道穿越顶管机的关键工作部件,主要用来完成对掌子面岩土的破碎剥离,对掘进性能有重要影响。针对穿河地区特殊地质概况,拟定刀盘结构设计方案,给出扭矩和推力计算方法,利用有限元分析软件 ANSYS 建立刀盘有限元模型,并在实际工况载荷下对刀盘整体进行静力分析,得到应力、应变分布和强度分布。分析结果表明,危险截面出现在牛腿与传动轴交界处,最大应力为37.6 MPa,最大变形为0.06 mm。%Pipe jacking project is regarded as a technology of non-excavation pipe jacking construction project,which has the most prominent feature of adaptability.The cutter head is one of the key components of the jacking machine crossing oil-gas pipelines,which major function is to accomplish crushing and peeling of rock soil of tunnel face,and takes a key role in digging function.Because of the difficulty of changing cutters and the complexity of the work environment,there is a high demand for the intensity of the cutter head.A corresponding cutter design program is established based on the special geology of the construction domain,and the torque and thrust calculation methods are given.Besides,the finite element model is established under the help of the ANSYS(finite element analysis software),so that the stress,strain,and strength reserve distribution are obtained.The analysis results show that the greatest equivalent stress appears at the interface between corbel and transmission shaft.The greatest stress is 37.6 MPa and the largest distortion is 0.06 mm.The result of this research provides effective theory evidence for optimal structural design of the cutter head.