电磁驱动薄壁铝合金柱壳的动态膨胀变形特征  

Dynamic Expansion Deformation Characteristics of Thin-Wall Aluminum Alloy Cylindrical Shell Driven by Electromagnetically

作　　者：许永鹏 董新龙[1] XU Yongpeng;DONG Xinlong(Faculty of Mechanical Engineering and Mechanics,Ningbo University,Ningbo 315211,China)

机构地区：[1]宁波大学机械工程与力学学院,宁波315211

出　　处：《机械工程材料》2021年第3期83-87,共5页Materials For Mechanical Engineering

基　　金：国家自然科学基金资助项目(11672143,11172144)。

摘　　要：采用ANSYS多物理耦合场有限元模拟分析了电磁线圈驱动不同轴向高度铝合金柱壳动态膨胀变形过程的磁压力分布及变形特征,并与试验结果进行对比。结果表明:有限元模型能较准确地模拟电磁线圈驱动柱壳膨胀的径向磁压力分布和变形情况;柱壳高度为20 mm时,端部的径向磁压力大于中部的,发生外凹形不均匀膨胀;柱壳高度为30,40 mm时,端部的径向磁压力小于中部的,发生内凸形不均匀膨胀;柱壳与线圈的高度之比在0.7左右时,端部与中部的径向磁压力基本相同,径向磁压力分布均匀。The magnetic pressure distribution and deformation characteristics during the dynamic expansion and deformation of aluminum alloy cylindrical shells with different axial heights driven by electromagnetic coils was analyzed by the ANSYS multiphysics coupling field finite element simulation,and compared with the experimental results.The results show that the finite element model could accurately simulate the radial magnetic pressure distribution and deformation of the cylindrical shell driven by the electromagnetic coil.When the height of cylindrical shell was 20 mm,the radial magnetic pressure at the end was greater than that in the middle,and occured concave uneven expansion.When the height of the cylindrical shell was 30,40 mm,the radial magnetic pressure at the end was smaller than that in the middle,and occured convex uneven expansion.When the height ratio of the cylindrical shell and the coil was about 0.7,the radial magnetic pressure was basically the same at the end and middle,and distribution of radial magnetic pressure was uniform.

关 键 词：有限元模型 铝合金柱壳 电磁驱动 膨胀变形 径向磁压力 

分 类 号：TH142.2[一般工业技术—材料科学与工程]