Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : August 07, 2016 - August 10, 2016
When the power transmission systems are designed or improved, the understanding of gear dynamics is essential and very important. Especially, the gear system is hard to investigate because the gear noises should be carefully controlled. As a result, when designing and developing gear transmission systems, it is very important to grasp the noise and to reduce the noise. In previous study, to reduce the calculation time and to represent a flexibility, a rotational joint and force element with a bending stiffness are applied between teeth and trunk [5]. We called it Quasi-flexible-body (QFB) gear model and this model was implemented in RecurDyn [11]. It is good to obtain the dynamic transmission error (DTE) which are utilized to evaluate the noise, but it takes an extra time to decide the bending stiffness coefficient than one body gear model because all teeth body are separated from the trunk. Therefore, this paper proposes the variable stiffness contact force method and one body gear model to reduce the process to decide the bending stiffness. The variable stiffness contact force method is a modified compliant contact force model based on the Hertzian contact theory [6, 9]. The one body gear model has a whole rigid body with a joint in the body center. In the geometry of the gear teeth, the biarc method [4] is used to approximate the involute tooth profile to two arcs. It can resolve the contact geometry complexity. Also numerical results have been compared with the previous Quasi-flexible-body (QFB) gear model and the experimental data [2, 3].
