EN
By using the topological degree theory and some analytic methods, we consider the periodic boundary value problem for the singular dissipative dynamical systems with p-Laplacian: $(ϕ_p(x'))' +d/dt gradF(x) + gradG(x) = e(t)$, x(0) = x(T), x'(0) = x'(T). Sufficient conditions to guarantee the existence of solutions are obtained under no restriction on the damping forces d/dt gradF(x).