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Table 2 The lowest four buckling coefficients of a uniformly compressed simply supported square plate

From: A mixed Legendre-Galerkin spectral method for the buckling problem of simply supported Kirchhoff plates

α

N  = 10

N  = 20

N  = 30

Ref. [ 12 ] N  = 80

2.0

25.5283500058494

25.5283479481006

25.5283479481008

25.5619

4/3

11.0117810710886

11.0117810716443

11.0117810716443

11.0152

1

7.81195727517932

7.81195727522176

7.81195727522178

7.8142

4/5

6.59506010731459

6.59506010732159

6.59506010732162

6.6026

2/3

5.96338451327805

5.96338451327973

5.96338451327975

5.9701