The vibration response equation of an infinite plate with quadrate steel beams under point force load is derived using mechanical mobility method.The effects of different layouts of quadrate steel beams on plate vibration are investigated by numerical calculation.The results show that the vibration level difference of the target area decrease with the increase in the distance from the load to the target area;the vibration of the target area that is far from the load and near the symmetry axis is amplified f...