These flexibilities should be divided by the reference value of E to be used in the beam 

 equations. Shear output includes the location of the shear center and flexibilities (torsion 

 and shear). 



Torsion Flexibility = l/J^, (GJ^ is torsional rigidity) 





Ky.A 



YZ Flexibility 



1 



ZZ Flexibility 



1 



~ T.' A 



K ,A 



These should be divided by the reference value of G for use in the beam equations. 



TROUBLE SHOOTING 



If the machine stops on an arithmetic overflow, the operator should make sure that: 



1. SCALE > 0. 



2. All PT> 0. 



3. All ?G > 0. 



4. There is some mass if second digit of KEY = 1. 



5. There is some area, and it does not all lie upon a straight line if the second digit 

 of KEY = 1, 2, 3. 



The machine may print THE STRUCTURE IS NOT PROPERLY CONNECTED. 



This may be due to one of the following two causes: All nodes must be joined by at least one 

 path through the plates and there must be at least one closed loop. (For the case of symmetry 

 when only half of the structure is drawn, it is sufficient to have at least one closed loop in 

 the complete section.) 

 Limits 



2 - NN (number of nodes) - 150 



2 ^ NP (number of plates) ^ 150 



- NW (number of masses) - 100 



FLOW CHART 



A copy of the flow chart of the computer program (Figures 5a— h) is included for 

 reference. 



85 



