![ansys contact ansys contact](https://us.v-cdn.net/6032193/uploads/attachments/d8c4b4b8-ed55-44a2-bc03-ab8d008ca819/815aac7a-efc5-492a-9a32-ab93005d22bf_contacts-in-active.jpg)
But there are still four unknown parameters that cannot be solved by two equations. According to the basic theory of Finite Element, the balanced equation can be obtained:Īre the contact force vectors of A and B.Īccording to the analysis of the balanced equations, once the characteristics of materials and external load have been determined, theĪlso have been determined. When the A and B contacts, there will be innumerable contact points and they can make respective displacement The motion equation of transient dynamics analysis:īased on the linear static structure analysis, the driving wheel and the driven wheel are set as elastic bodies A and B respectively. The transient dynamics analysis can determine the time-varying displacement, strain, stress, and force response of the structure under the random combination of the steady load, transient load, and simple harmonic load. Transient dynamics analysis is used to determine the dynamic response of the time-varying load structure. During the process of the gear meshing transmission, it provides a common conclusion and solution for the great force of the gear tooth, serves deformation and fatigue failure. The deformation, stress change, and fatigue change have been obtained from the analysis. The 3-D geometry model was established by UG, and the ANSYS was used to analyze the transient contact dynamic characteristics.
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To solve these problems, in this paper, a pair of ordinary straight tooth cylindrical involute gears have been taken as research object.
![ansys contact ansys contact](https://i.ytimg.com/vi/L9dYcIkg3Z4/maxresdefault.jpg)
Although others considered the gear faces friction, these models assigned the friction on the gear faces averagely and the stress change trend of the gear meshing does not obtain. But most of them neglected the effect of the friction between the gear faces on the gear transmission. Some scholars have established many dynamic characteristic mathematical models of the gear meshing. But above research, from the machining quality and accuracy, has not analyzed the effect of the gear wearing produced during the gear meshing on single gear stress and fatigue life. Ma et al., based on Chaari’s research, studied the influence of the tooth surface flaking on the gear vibration characteristic signal. used the Weber method material mechanics to analyze the effect of tooth surface flaking on the meshing stiffness by the gear deformation and hertz contact deformation. Scholars at home and abroad have conducted in-depth research on this issue and have achieved fruitful results. These failures all affect the transmission ratio and the stability of the gear transmission system so that the life of the mechanical system decreases. Lightly there are gear wearing and gear pitting, and worse there are gear bonding even tooth fracture. So, during the transmission, the face of gear often becomes invalid. During the transmission process of gears with varieties accuracy, the different friction coefficient between the faces of gears has a direct effect on the gears’ life. Because the generating bases on the theory of gear meshing, the accuracy is higher. The gear processed by copying has low accuracy and the accuracy is always below 11 degree. The common methods of gear processing can be divided into copying and generating by the theory. Because the transmission ratio can be kept constant, the gear transmission is widely applied in many kinds of gearboxes, heavy equipment, and other areas. It has a strict transmission ratio and transfers smoothly. Gear transmission is the most widely applied transmissions among the mechanical transmissions.