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                                                                                      LES PORTIQUES                                                                                 353

8                                                                    L = H =10                  8                                                    L =10 ; H = 5
                                                                     h1 h2                                                                           h1 h2
     Ω1σ                                                                                             Ω1σ
      p1L                                                         ∞                                   p1L
                                                                     1086
7                                                                          4                    7
                                                                               2
6                                                                               k =1  Z =0.75   6

5                                                                                                                                                    k =1

4                                                                                               5

                                                                                                                                               2                          Z =0.75

                                                                                                4                                       4
                                                                                                                                    6
                                                                                                                              10 8

                                                                                                                        ∞

3                                 ∞                                                   Z =0.375  3                                              k =1
                                  1086 4                                              Z =0.25
                                                                                                          ∞                                 2
                                           2                                                    2
                                           k =1                                                                         10 8 6 4
                                                                                                          ∞
                            k =1                                                                                                                                          Z =0.375
                                                                                                                                                                           Z =0.25
2                        2

               10 8 6 4                                                                                                 10 8 6 4 2 k = 1

           ∞

11

                                                                                                                        LL
                                                                                                                        HH

00
   0 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 8 9 10

   40                             Figure 2.6.5.                                                    40                                          Figure 2.6.6.

        Ω 2σ                        Z = 0.75 ; L = H =10                                                Ω 2σ                                   Z = 0.75 ; L = 10 ; H = 5
                                                 h1 h2                                                                                                     h1 h2
          p1L                                                                                             p1L

   35 35

   30 30

   25 25

   20 k =1                                                                                         20

   15                                                                                              15
                                                                    2

                                                               4                                                                      k =1
   10                                                                                              10

                                                             6                                                                  2

                                                           8
                                                         10

                                                                                                                     4

   5∞                                                                                              5              6
                                                                                                                 8
                                                                                                             10

                                                                                                L                                                                                   L
                                                                                                H∞                                                                                  H

   00

   0 1 2 3 4 5 6 7 8 9 10                                                                              0 1 2 3 4 5 6 7 8 9 10

                                  Figure 2.6.7.                                                                                                Figure 2.6.8.
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