两片罐的拱底形状对于拱底耐压性能影响的研究

Study of the influence of dome profile on the dome reverse pressure of two piece can

拱底耐压能力是两片罐的一项重要性能指标,通常要求拱底耐压性能达到90psi以上。随着DI材厚度的减薄,拱底耐压性能会下降,因此,需要分析罐底形状对拱底耐压性能的影响,以便于对罐底形状进行设计,提高两片罐的抗拱底翻转能力。本文在对两片罐的拱底失稳过程有限元模拟的基础上,计算出两片罐的拱底失稳压力值,分析了主要的拱底形状参数如拱底直径、拱顶圆弧半径、拱底内侧角等对两片罐拱底抗翻转性能的影响。结果表明,较小的拱底直径和拱底内侧角对于提高拱底抗翻转能力是有利的;适当增大拱顶圆弧,可以一定程度上提高拱底抗失稳能力,但如果拱顶圆弧过大,反而会导致拱底耐压性能的急速下降。

The dome reverse pressure is an important property of two-piece can, which should be not less than 90psi according to the standard. As the dome reverse pressure will decrease with the thickness of DI tinplate reduction, it is necessary to analyze the influence of the base section on the dome reverse pressure of two piece can so as to improve it by new base design. Based on the numerical simulation of dome reverse process, the pressure of dome reverse is calculated and the influence of main dome profile parameters, such as the base diameter, the dome top radius and the inner angle on the dome reverse pressure of two piece can are studied. It shows that the dome reverse pressure increases with smaller base diameter and inner angle. It also could be found that the dome reverse pressure increases to some extent with a larger dome radius, however, it will decrease rapidly with excessive large dome radius.