烧结机台车体温度场及热应力数值模拟

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。

Numerical Simulation of Temperature Field and Thermal Stress on Sintering Trolley

Considering failure problem of the girder of sintering machine trolley in a factory,the indirect thermal-mechanical coupling method on the basis of ANSYS finite element software is adopted to establish the mathematical model of the trolley girder.According to heat conduction theory and thermoelasticity theory,the changing process of temperature and thermal stress in different parts under working condition is simulated.The results show that the region with maximum temperature in girder of sinter machine trolley is varied with time;it appears in the center of the girder at the beginning of the sintering up to 600s and in the lateral side of the girder after 600s.The maximum temperature reached 279℃.The maximum thermal stress about 27.6MPa,is generally appears in the position furthest away from the center of the girder.The simulation method is verified reliable by compared the calculated results with testing values.