Research Article

A Refined Higher-Order Hybrid Stress Quadrilateral Element for Free Vibration and Buckling Analyses of Reissner-Mindlin Plates

Table 11

Ten lowest parameterized natural frequencies of a clamped circular plate with .

ModeNS-ES-FEMS8RMIN3ES-FEM+DSG3ANS4 QH8-RCVQH8-LVRef. sol [43]

19.24609.25399.96829.32629.26059.33809.44449.240
217.642417.811520.30618.046117.946917.860218.192617.834
317.646117.811520.325618.067317.946917.860318.193817.834
426.569927.092332.780027.843827.034526.974627.560227.214
526.574027.165032.790527.885627.656626.983627.685427.214
629.765430.410137.159131.128030.322130.084630.863130.211
735.559533.881547.543738.693637.257936.541937.399037.109
835.599933.884847.599338.704237.257936.543137.409637.109
941.056037.029055.353044.113043.270241.899942.844542.409
1041.122637.032455.660844.328643.270241.901142.846542.409