Papers by Keyword: Meshing Frequency

Abstract: In this report, an approach to calculating meshing frequency through the rotational speed of the sun gear, ring gear, and carrier of a planetary gear set is proposed. The proposed method includes a convenient contour map of the rotational speed of each component of the planetary gear sets and the meshing frequency. This contour map is used to estimate the relationship between the numbers of teeth, the rotational speed, and the meshing frequency. The results of experiments measuring acceleration via an accelerometer attached to the edge of a carrier clearly showed the meshing frequency and rotational component frequency at each rotational speed. A comparison of the acceleration at each meshing frequency shows that the vibrational level can be reduced by modifying the specifications of the planetary gear set (the number of teeth, number of pinions, radius of the carrier, etc.). The proposed method is an effective means of reducing vibration and noise in planetary gear sets.

Abstract: The prime source of vibration and noise in a gear system is originated from transmission error between the meshing gears. In this paper, the dynamic modeling method and response of a spur gear pair for the efficient system simulation are investigated by using a detailed contact analysis at each time step. Input values such as time-varying mesh stiffness and static transmission error excitation are not required in this investigation because mesh forces are obtained by contact analysis directly. The efficient contact search kinematics and algorithms in the context of the compliant contact model are developed to detect the interactions between teeth surfaces. In this investigation the compliant force model based on the Herzian law is employed using Coulomb friction force model, and dynamic transmission error (DTE) and mesh frequency values of contacting gear system are also illustrated.