Page 100 - 4560
P. 100

where we denote
                                       kb
                                   4     .
                                      4EJ
                                          z
                 The general integral of the equation (8.3) has the form

                  y   y   y   e   x  C  cos x C   sin    x 
                      1    2        1           2
                                                                     (8.4)
                      e  x  C  cos x C   sin    x   y ,
                            3          4           2
          where  y   –  the  general  integral  of  the  homogeneous  equation
                   1
          (with  q  );  y  – partial solution, depending on the type of the
                    0
                         2
          right side of the equation, i.e. on the load q   q   x .
                  The steel integrationC ,  C ,  C  and  C  are determined
                                        1   2    3       4
          considering the loading and leaning of the beam.
                 In the particular case the load is distributed linearly
                                q   q   q x  ,                    (8.5)
                                     0   0
          the solution  y  can also be represented as the linear function
                        2
                                y   A Bx  .                        (8.6)
                                 2
                 By substituting formulas (8.5) and (8.6) in equation (8.3),
          we obtain

                                                                  kb
              A q    4 4 EJ     q  / kb   q   4 4 EJ    q    .
                                       і  B 
                   0        z     0             0         z    0
                 So, in this case, a partial solution for the load

                                                 q    q   q x 
                                                y     0  0  .
                                             2
                                                kb      kb
                                     (8.7)

                  Figure 8.2                The       function      y 2    x
                                     determines  the  absorbing  of  a
                                     foundation from the load  q , which is
          applied  directly  to  the  surface  of  the    foundation  (Fig.  8.2).
          Obviously,  the  choice  of  a  partial  solution  in  the  form  (8.7)  is


                                        100
   95   96   97   98   99   100   101   102   103   104   105