Chebyshev pseudospectral method finds approximate solutions of the Mathieu's equationsMathieu's equations are second-order linear ordinary differential equations; they have many
SINUSOIDAL VELAROIDAL SHELL - NUMERICAL MODELLING OF THE NONLINEAR BUCKLING RESISTANCE and the force nonlinearity. The nonlinearity, applied to a sinusoidal velaroidal shell with the inner radius
r(0