EX. US-20 Generating a Structure in Cylindrical Coordinates
This example generates the geometry of a cylindrical tank structure using the cylindrical coordinate system. The tank lies on its side in this example.
This problem is installed with the program by default to C:\Users\Public\Public Documents\STAAD.Pro CONNECT Edition\Samples\Sample Models\US\US-20 Generating a Structure in Cylindrical Coordinates.STD when you install the program.
In this example, a cylindrical tank is modeled using finite elements. The radial direction is in the XY plane and longitudinal direction is along the Z-axis. Hence, the coordinates in the XY plane are generated using the cylindrical coordinate system.
STAAD SPACE
The type of structure (space frame) and length and force units for data to follow are specified.
JOINT COORD CYLINDRICAL
The above command instructs the program that the coordinate data that follows is in the cylindrical coordinate system (r,theta,z).
1 10 0 0 8 10 315 0
Joint 1 has an 'r' of 10 feet, theta of 0 degrees and Z of 0 ft. Joint 8 has an 'r' of 10 feet, theta of 315 degrees and Z of 0 ft. The 315 degrees angle is measured counter-clockwise from the +ve direction of the X-axis. Joints 2 to 7 are generated by equal increments of the coordinate values between joints 1 and 8.
REPEAT 2 0 0 8.5
The REPEAT command is used to generate joints 9 through 24 by repeating twice, the pattern of joints 1 to 8 at Z-increments of 8.5 ft for each REPEAT.
PRINT JOINT COORD
The above command is used to produce a report consisting of the coordinates of all the joints in the Cartesian coordinate system. Note that even though the input data was in the cylindrical coordinate system, the output is in the Cartesian coordinate system.
ELEMENT INCIDENCES
1 1 2 10 9 TO 7 1 1
8 8 1 9 16
REPEAT ALL 1 8 8
The above 4 lines identify the element incidences of all 16 elements. Incidences of element 1 is defined as 1 2 10 9. Incidences of element 2 is generated by incrementing the joint numbers of element 1 by 1, incidences of element 3 is generated by incrementing the incidences of element 2 by 1 and so on up to element 7. Incidences of element 8 has been defined above as 8 1 9 16. The REPEAT ALL command states that the pattern of all the elements defined by the previous 2 lines, namely elements 1 to 8, must be repeated once with an element number increment of 8 and a joint number increment of 8 to generate elements 9 through 16.
PRINT ELEMENT INFO
The above command is self-explanatory.
FINISH
Input File
STAAD SPACE
UNIT KIP FEET
JOINT COORD CYLINDRICAL
1 10 0 0 8 10 315 0
REPEAT 2 0 0 8.5
PRINT JOINT COORD
ELEMENT INCIDENCES
1 1 2 10 9 TO 7 1 1
8 8 1 9 16
REPEAT ALL 1 8 8
PRINT ELEMENT INFO
FINISH
STAAD Output File
PAGE NO. 1 **************************************************** * * * STAAD.Pro CONNECT Edition * * Version 22.12.00.*** * * Proprietary Program of * * Bentley Systems, Inc. * * Date= OCT 27, 2022 * * Time= 15: 9:29 * * * * Licensed to: Bentley Systems Inc * **************************************************** 1. STAAD SPACE INPUT FILE: US-20 Generating a Structure in Cylindrical Coordinates.STD 2. UNIT KIP FEET 3. JOINT COORD CYLINDRICAL 4. 1 10 0 0 8 10 315 0 5. REPEAT 2 0 0 8.5 6. PRINT JOINT COORD JOINT COORD STAAD SPACE -- PAGE NO. 2 JOINT COORDINATES ----------------- COORDINATES ARE FEET UNIT JOINT X Y Z 1 10.000 0.000 0.000 2 7.071 7.071 0.000 3 0.000 10.000 0.000 4 -7.071 7.071 0.000 5 -10.000 0.000 0.000 6 -7.071 -7.071 0.000 7 -0.000 -10.000 0.000 8 7.071 -7.071 0.000 9 10.000 0.000 8.500 10 7.071 7.071 8.500 11 0.000 10.000 8.500 12 -7.071 7.071 8.500 13 -10.000 0.000 8.500 14 -7.071 -7.071 8.500 15 -0.000 -10.000 8.500 16 7.071 -7.071 8.500 17 10.000 0.000 17.000 18 7.071 7.071 17.000 19 0.000 10.000 17.000 20 -7.071 7.071 17.000 21 -10.000 0.000 17.000 22 -7.071 -7.071 17.000 23 -0.000 -10.000 17.000 24 7.071 -7.071 17.000 ************ END OF DATA FROM INTERNAL STORAGE ************ 7. ELEMENT INCIDENCES 8. 1 1 2 10 9 TO 7 1 1 9. 8 8 1 9 16 10. REPEAT ALL 1 8 8 11. PRINT ELEMENT INFO ELEMENT INFO STAAD SPACE -- PAGE NO. 3 ELEMENT INFORMATION ------------------- ELEMENT INCIDENCES THICK POISS E1/E2 G1/G2 AREA NO. (FEET) 1 1 2 10 9 0.000 0.000 0.000000E+00 0.000000E+00 6.505619E+01 0.000000E+00 0.000000E+00 2 2 3 11 10 0.000 0.000 0.000000E+00 0.000000E+00 6.505619E+01 0.000000E+00 0.000000E+00 3 3 4 12 11 0.000 0.000 0.000000E+00 0.000000E+00 6.505619E+01 0.000000E+00 0.000000E+00 4 4 5 13 12 0.000 0.000 0.000000E+00 0.000000E+00 6.505619E+01 0.000000E+00 0.000000E+00 5 5 6 14 13 0.000 0.000 0.000000E+00 0.000000E+00 6.505619E+01 0.000000E+00 0.000000E+00 6 6 7 15 14 0.000 0.000 0.000000E+00 0.000000E+00 6.505619E+01 0.000000E+00 0.000000E+00 7 7 8 16 15 0.000 0.000 0.000000E+00 0.000000E+00 6.505619E+01 0.000000E+00 0.000000E+00 8 8 1 9 16 0.000 0.000 0.000000E+00 0.000000E+00 6.505619E+01 0.000000E+00 0.000000E+00 9 9 10 18 17 0.000 0.000 0.000000E+00 0.000000E+00 6.505619E+01 0.000000E+00 0.000000E+00 10 10 11 19 18 0.000 0.000 0.000000E+00 0.000000E+00 6.505619E+01 0.000000E+00 0.000000E+00 11 11 12 20 19 0.000 0.000 0.000000E+00 0.000000E+00 6.505619E+01 0.000000E+00 0.000000E+00 12 12 13 21 20 0.000 0.000 0.000000E+00 0.000000E+00 6.505619E+01 0.000000E+00 0.000000E+00 13 13 14 22 21 0.000 0.000 0.000000E+00 0.000000E+00 6.505619E+01 0.000000E+00 0.000000E+00 14 14 15 23 22 0.000 0.000 0.000000E+00 0.000000E+00 6.505619E+01 0.000000E+00 0.000000E+00 15 15 16 24 23 0.000 0.000 0.000000E+00 0.000000E+00 6.505619E+01 0.000000E+00 0.000000E+00 16 16 9 17 24 0.000 0.000 0.000000E+00 0.000000E+00 6.505619E+01 0.000000E+00 0.000000E+00 ******************END OF ELEMENT INFO****************** 12. FINISH STAAD SPACE -- PAGE NO. 4 *********** END OF THE STAAD.Pro RUN *********** **** DATE= OCT 27,2022 TIME= 15: 9:29 **** ************************************************************ * For technical assistance on STAAD.Pro, please visit * * http://www.bentley.com/en/support/ * * * * Details about additional assistance from * * Bentley and Partners can be found at program menu * * Help->Technical Support * * * * Copyright (c) Bentley Systems, Inc. * * http://www.bentley.com * ************************************************************