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针对某厂烧结台车主梁失效的问题,借助ANSYS有限元软件,采用间接热力耦合的方法,建立了台车主梁数学模型。根据热传导理论与热弹性理论,模拟其在工作状态下各部位的温度、热应力变化过程。结果表明,烧结台车主梁最高温度区域随烧结时间变化,在烧结开始至600 s左右最大值出现在梁的中心位置,在600s后最高温度区域出现在梁的侧边,台车主梁最高温度达到279℃;热应力极值点一般出现在距中心面最远的位置,最大热应力达到27.6 MPa。通过与测试值的对比验证了仿真结果的可靠性,表明采用有限元方法模拟台车体温度及应力场的变化过程是有效的。
Aiming at the failure of the main girder of a sintering plant, the mathematical model of the main girder of the trolley is established by means of the indirect thermodynamic coupling with ANSYS finite element software. According to the theory of heat conduction and thermoelasticity, the temperature and thermal stress of each part under the working condition are simulated. The results show that the maximum temperature of the main beam of sinter trolley changes with the sintering time, and the maximum value appears at the center of the beam about 600 s after sintering. The maximum temperature of 600 s appears on the side of the beam. 279 ℃. The extreme point of thermal stress generally appears at the farthest position from the center plane, and the maximum thermal stress reaches 27.6 MPa. The reliability of the simulation results is verified by comparison with the test values, which shows that the finite element method is effective in simulating the temperature and stress field changes of the truck body.