振动不同步对结晶器内铸坯应力影响有限元分析

Finite Element Analysis of Influence of Vibration Asynchronism on Slab Stress in Mould

基于实测连铸结晶器振动曲线数据,分析结晶器两侧振动不同步的运动特性,并利用Ansys软件对结晶器振动过程进行有限元模拟,获得铸坯应力分布。结果表明结晶器在振动过程中发生相对转动,对铸坯产生相对挤压和偏离;铸坯窄面和角部区域受结晶器相对挤压影响,随离弯月面距离增大,其应力增大;在相对挤压时,铸坯底端角部应力受结晶器相对位移和转动影响,随结晶器相对转动角位移增大和相对位移减小,铸坯应力增大。

Based on the measured vibration curve data of continuous casting mould,the motion characteristics of two sides of crystallizer were analyzed,and the vibration process of the crystallizer was simulated by finite element method using Ansys software,and the stress distribution of the slab was obtained.The results show that the relative rotation of the mould in the process of vibration results in relative extrusion and deviation of the slab;the narrow surface and corner area of the billet are affected by relative extrusion of the mould,and the stress increases with the increase of the distance from the meniscus;when relative extrusion occurs,the corner stress at the bottom of the slab is affected by relative displacement and rotation of the mould,and with the increase of the relative extrusion distance from the meniscus.The relative rotation angle increases and relative displacement decreases,and the stress in slab increases.