对铸铁工作台和泡沫铝填充结构机床工作台的疲劳特性进行有限元仿真研究,获得其在交变载荷作用下的应力分布图和最终疲劳失效图,并对结果进行对比分析。结果表明,与铸铁工作台相比,在恒幅交变载荷作用下,泡沫铝填充结构机床工作台的最大应变量小、产生的疲劳裂纹数目少,应力集中程度低,进一步证明了泡沫铝填充结构机床工作台在高速加工中应用的可行性和优越性。 The fatigue characteristics of cast iron workbench and foamed aluminum filled structure machine tool workbench are studied by finite element method. The stress distribution diagram and the final fatigue failure diagram under alternating load are obtained, and the results are compared and analyzed. The results show that compared with the cast iron bench, under the action of constant amplitude alternating load, the maximum strain of the work bench of the foam aluminum filled structure machine is small, the number of fatigue cracks is small and the stress concentration is low, which further proves that the aluminum foam filled The feasibility and superiority of structural machine tool table in high speed machining.