Key 



Some control over which calculations should be made is provided by KEY. Each of 

 the three digits which make up KEY (Table lb) has a specific meaning and must be assigned 

 one of the allowable values. The first digit is 1 if information is given about the complete 

 section; 2 if symmetry is used and information given for half of the section. The second 

 digit is 1 if all mass, bending, shear, and torsion parameters are to be calculated; it is 2 

 for only elastic parameters (bending, shear, torsion), 3 for only bending parameters, and 4 

 for only torsion parameters. The third digit controls only the output; if 1 it prints all section 

 parameters specified by the second digit; if 2, it will in addition print the shear flows in the 

 plates. 



Units 



Any consistent set of units may be used. Masses may be computed in weight or mass 

 units. The values of RHO, W, WY'Y, WYZ, and WZZ should be given in the same system. 

 Provision is made to give lengths in mixed units if desired. If consistent units are used, 

 then SCALE = 1.0. If lengths are given in feet (i.e., Y, Z, DX), areas in square inches, and 

 plate thicknesses in inches, SCALE = 12.0 and RHO is in (-) per cubic foot.* 



These data are collected and put on an input form such as Table 2, from which it is 

 punched into cards for input to the computer. The input and output forms (Tables 2 and 3a, 

 respectively) and the associated operation and rules of the computer program are discussed 

 in Appendix C. 



COMPARISON BETWEEN COMPUTER AND MANUAL 

 COMPUTATIONS FOR SAMPLE PROBLEM 



To test the program, a sample hand calculation was made and compared with a solution 

 of the same problem using the computer routine. Figure 1 shows the plates and nodes, and 

 Table 2 indicates the data for the sample problem. The manual calculations are shown in 

 Table 4, and are compared in Table 3b with the computer output shown in Table 3a. The 

 shear flows (from the computer solution) are shown in Figure 2. The theoretical basis for 

 these calculations is presented in Appendix A. 



Node calculations are shown at the top of Sheet 1, Table 4; plate calculations at the 

 bottom of Sheet 1; shear flows due to y-shear at the top of Sheet 2; shear flows due to z-shear 

 at the bottom of Sheet 2; and shear flows due to torque on Sheet 3. On Sheet 1, data are given 

 in Columns (T)-{¥) for nodes and (l)-(_5) for plates. Columns \§)-\^ for plates are found by 

 Column \2) and node Columns (2) and (^. Plate Columns nO) and n l) are used to calculate 

 (12) , and thus also (l3) and 61). 



"(— ) indicates the mass unit. 



(Text continued on page 11.) 



