不同布孔形式筛管的抗压溃强度有限元分析

为研究不同布孔形式对筛管抗压溃强度的影响,基于弹塑性理论,以ABAQUS软件为开发平台,建立了考虑初始椭圆度的不同布孔形式筛管的有限元模型,并利用试验数据对模型进行了验证,研究了外压作用下平行布孔、交错布孔和螺旋布孔筛管在不同结构参数下压溃强度的变化规律。研究结果表明:当孔密和孔径都较小时,螺旋布孔筛管压溃强度大于其他布孔形式;当孔径和孔密较大时,交错布孔筛管压溃强度大于其他布孔形式;随着孔径或孔密的增大,螺旋布孔筛管压溃强度降低最为明显;在孔径或孔密增大初期,交错布孔筛管压溃强度下降速度近似等于平行布孔筛管。所得结论可为筛管布孔形式的选择及参数优化提供参考。

Finite Element Analysis on Anti-Collapsing Strength of Screen Pipes with Different Hole Arrangements

In order to study the impact of different hole arrangements on the anti-collapsing strength of screen pipes,a finite element model for screen pipes different hole arrangements,taking into account the initial ovality,was established based on the elastic-plastic theory on a development platform underlying the ABAQUS software,and which was verified with empirical data.Moreover,the law of change of the collapsing strength of screen pipes subject to external pressures and with different structural parameters corresponding to the parallel,staggered and spiral hole arrangements.Results indicate that the collapsing strength of screen pipes with a spiral hole arrangement is greater than that with other hole arrangements when both the hole density and hole diameter are small;while the collapsing strength of screen pipes with a staggered hole arrangement is greater than that with other hole arrangements when both the hole density and hole diameter are big;screen pipes with a spiral hole arrangement showed the most obvious reduction in collapsing strength with the increase of hole density or hole diameter;screen pipes with the staggered and parallel hole arrangements showed an approximately equal reduction in collapsing strength during the initial period with the increase of hole density or hole diameter.These conclusions can provide a reference for screen pipe hole arrangement selection and parameter optimization.