Free Vibrations of a Trapezoidal Plate with an Internal Line Hinge

Figure 4

First five values of the frequency parameter Ω=𝜔/(2𝜋)𝑙²𝜌ℎ/𝐷₀ nodal patterns and mode shapes for a SCF anisotropic triangular plate (tan𝛼₁=−tan𝛼₂=0.5) with a line hinge (𝑅₁₂=0) located at 𝑐_𝑙=0.5.