Saddle - General Information

Owned by Former user (Deleted)
Dec 11, 2015
2 min read

Description: The label given for the component. It will appear in the component pane, the report dialog, the summary pane, and at the top of the component report. This will default to the component type and component number. For example, the third nozzle for the vessel will start with a description of Nozzle 3.

Mark: A shorthand reference for the component. It will also appear in the component report. The default entry will be an abbreviation of the component type and the component number. For example, the second jacket shell for the vessel will start with a mark SJ2.

Elevation above grade: The distance from grade to the bottom of the base plate.

Vessel Centerline height: The distance from the bottom of the base plate to the longitudinal axis of the saddled shell.

Angle of contact of saddle with vessel: The central angle of contact between the outside stiffeners with the vertex at the axis of the vessel. This value can be increased depending on top flange design settings.

Distance from center line of saddle to tangent line: Enter the distance from the center of a saddle to the nearest tangent line. This will always be a positive number.

Add Wear Plate: Select this box to add a wear plate to the saddle design.

Support Design Condition: Select the design condition of the shell. If the A/R ratio is less than or equal to 1/2 (A/R <= 1/2) and a stiffening ring is not added in the saddle design, the plane of the saddle will consider the stiffening effect of the head. Stiffening rings may be considered regardless of the A/R ratio, however if a wear plate is to be used to reduce various stresses during the Zick Analysis, a ring stiffener cannot be in the plane of the saddle. If A/R > ½ and there is not a stiffening ring added in the saddle design, the plane of the saddle will not be stiffened.

Top Flange Design: The presence of a saddle top flange and its function are decided here. The option to consider the top flange as a saddle element will allow the saddle stresses to consider the added strength of a top flange, however it will not increase the angle of contact to the top flange extension. Considering the top flange as a saddle extension will allow the saddle stresses to consider the added strength of a top flange and will use the angle measured to the horn of the flange as the angle of contact in the calculations instead of using the angle formed to the top of the outer saddle stiffeners. This will result in lower stresses.