中文摘要：

为了研究热载荷对矿用净水球罐罐体应力分布的影响,运用ANSYS有限元经典编程环境构建了净水球罐对接环焊缝的计算模型。分析了球罐环焊缝焊接过程的数值模拟,详细介绍了环焊缝温度场与应力场结果及分析。应力场分析表明,在球罐外表面焊料与母材结合处经向残余应力达到最大510 MPa,纬向峰值则出现在焊缝中心,而在球罐内表面赤道位置处两向残余应力最大且均小于420 MPa,该分析对减小球罐残余应力、确保设备安全运行具有一定的借鉴意义。

英文摘要：

In order to study influences of thermal load on stress distribution of mining purifying water spherical tank, the computational model of purifying water spherical tank＇s butt-welded joint was established by using ANSYS finite element classic programming environment. Numerical simulation on welding process of spherical tank＇s circumferential weld was analyzed, and results and analysis of temperature field and stress field of circumferential weld were introduced. The results showed that meridi- onalresidual stress reached the maximum 510 MPa at the junction of solders and base metal which was located on the outer surface of spherical tank, the peak of latitudinal residual stress appeared in center of the weld, but on the inner surface of spherical tank, both of meridional and latitudinal residual stresses got maximum value in the equatorial position and were all below 420 MPa. This research had a certain degree of reference to reduce the residual stress and ensure the safe operation of equipment.