  We propose a quantum algorithm for simulating spin models based on periodic
modulation of transmon qubits. Using Floquet theory we derive an effective
time-averaged Hamiltonian, which is of the general XYZ class, different from
the isotropic XY Hamiltonian typically realised by the physical setup. As an
example, we provide a simple recipe to construct a transverse Ising Hamiltonian
in the Floquet basis. For a 1D system we demonstrate numerically the dynamical
simulation of the transverse Ising Hamiltonian and quantum annealing to its
ground state. We benchmark the Floquet approach with a digital simulation
procedure, and demonstrate that it is advantageous for limited resources and
finite anharmonicity of the transmons. The described protocol can serve as a
simple yet reliable path towards configurable quantum simulators with currently
existing superconducting chips.
