In this paper, we study the global well‐posedness and scattering theory of the solution to the Cauchy problem of a generalized fourth‐order wave equation
∂ttu+normalΔ2u−normalΔu+u=−|u|p−1u,u(0,x)=u0(x)∈H2(double-struckRd),ut(0,x)=u1(x)∈L2(double-struckRd),
where
1+4d