考虑受力蒙皮作用的除尘器壳体墙板的承载性能

采用非线性有限元方法研究除尘器壳体承受板顶竖向均布荷载作用的墙板发挥受力蒙皮作用时的破坏形式和承载能力，分析墙板厚度、墙板宽度、加劲肋间距、立柱横向支撑间距、立柱截面尺寸等因素对墙板承载能力的影响。结果表明：立柱受载水平较低时，墙板发生受剪屈服破坏；立柱受载水平中等时，墙板同时发生受压和受剪屈服破坏；立柱受载水平较高时，墙板发生受压屈服破坏。在同等立柱受载水平情况时，墙板承载能力随着墙板厚度增加、墙板宽度减小、加劲肋间距减小或者立柱支撑间距减小而增大。立柱截面尺寸增大使得立柱刚度增大时，立柱稳定性提高，墙板承载力增大。

Bearing performance of wallboards in an electrostatic precipitator casing in consideration of stressed skin effect

For a wallboard in an electrostatic precipitator casing playing stressed skin effect under vertical uniform pressure on the top, the failure mode and bearing capacity were investigated by nonlinear finite element method. The influences of structural factors such as wall thickness, wall width, stiffener spacing, column brace spacing and column section size on the wallboard bearing capacity were analyzed. The results show that, shear yielding failure of the wallboard occurs when the stressed level of the column is compara-tively lower. Shear yielding failure and compression yielding failure occur simultaneously when the stressed level of the column is medi-um. Compression yielding failure occurs when the stressed level of the column is comparatively higher. Under the equal column stressed level, the bearing capacity of the wallboard increases with the increase of wall thickness and with the decrease of wall width, stiffener spacing or column brace spacing. The bearing capacity of the wall increases as the column stiffness is increased resulting from the enlargement of column section and its stability increases.