Improving vibrator structure to eliminate vibration noise

Vibroseis is an important deep seismic exploration method, and the vibrator is a unique tool used to transmit scanning signals underground. However, seismic waves recorded by receivers often contain many kinds of noises, such as vibration noise, which are detrimental to the perception of the source signal. This work attempts to eliminate vibration noise by improving the vibrator structure, while retaining the signals’ energy. Hydraulic oil ducts in traditional piston vibrators are set on one side of the hammer. When oil is delivered at high pressure into the oil duct, a horizontal torque is exerted on the hammer, causing it to shake and produce noise. The vibrator’s force analysis shows that the torque on the hammer generates a horizontal force on the four upright columns causing them to bend, as is evident from the deformation results. The vibrator structure can be improved by setting the hydraulic oil ducts in the piston rod in such a way that the hammer is structurally symmetrical on both sides, and the high oil pressure does not produce horizontal interference force. Finite element analysis shows that the columns do not deform in such a design. The vibration simulation experiment proves that deviation between actual output force and theoretical output force is reduced.