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2D Elements

MIDAS PYTHON

PLATE

A nested class within Element used to create Plate elements.

Object Attributes

ID: Element ID
TYPE: Element type = 'PLATE'
MATL: Material ID of the beam element
SECT: Section ID of the beam element
NODE: Nodes of element in list. eg: [1,2,3,4]
ANGLE: Beta angle of the beam element
STYPE: Type of Plate element

    1 : Thick   |   2 : Thin   |   3 : Thick w Drilling dof   |   4 : Thin w Drilling dof

Constructor

Element.Plate(nodes:list, stype:int=1, mat = 1, sect = 1, angle = 0, group = '' , id = 0)
Creates a Plate element.

Parameters

  • node: Nodes of the Plate element
  • stype (default=3): Sub Type of Plate element
         1 : Thick   |   2 : Thin   |   3 : Thick w Drilling dof   |   4 : Thin w Drilling dof
  • mat (default=1): Material ID of the Plate element
  • sect (default=1): Thickness ID of the Plate element
  • angle (default=0): Beta angle of the Plate element
  • group (default=''): Structure group of the element (can be str or list eg. 'SG' or ['SG1','SG2'])
  • id (default=0): Manually assign an ID. If 0, ID will be auto-assigned.

Examples

Node(0,0,0)
Node(1,0,0)
Node(1,1,0)
Node(0,1,0)
Element.Plate([1,2,3,4])

Node.create()
Element.create()

Examples

1. Silo

import math
R_top=5.0   # Radius at the top of Silo
R_bot = 2.5 # Radius at the bottom of Silo < R_top

H_tot=20.0 # Total height of Silo
H_tap = 5  # Height of tapered portion < H_tot

nR=32      # Sides of cylinder
nH=20      # Divisions along height

for q in range(nH+1):
    for i in range(nR):
        theta = i*2*math.pi/nR
        R = min(R_top,R_bot+q*H_tot/nH*(R_top-R_bot)/(H_tap))
        Node(R*math.sin(theta),R*math.cos(theta),q*H_tot/nH)

for q in range(nH):
    n_list = list(range(q*nR+1,(q+1)*nR+1))
    for i in range(nR):
        n1=n_list[i]
        n2=n_list[(i+1)%nR]
        Element.Plate([n1,n2,n2+nR,n1+nR])

Node.create()
Element.create()
NODE GRID