选择平形封头中是否有一系列均匀的孔。软件然后根据ASME规范第VIII部分1部分UG-39计算由孔模式产生的韧带所需的厚度。 选中时，需Evaluate Uniform Patterned Holes? 为 Opening Diameter， Ligament Distance to Edge (U3), Opening Diameter (d2), Ligament Distance to Edge (U5), and Pitch Distance (p).输入值。
当 Large Central Opening in Head 。Nozzles are also not compatible and are not analyzed. This option is only available when Welded Flat is selected for Element Type.