Technical Research On Detailed Design Of The Landing Gear's Shock Strut Medi-stem Based On ANSYS

Landing gear is an important component of the airplane for bearing the load. Its stress design is very important when a new landing gear is designed. In order to reduce the quality of an aircraft and improve airplane performance, it is necessary to research the dynamic property of the landing gear system by using the finite elements emulation technology.At first, the finite elements method and the basic functions of ANSYS software are expressed. Then, With the application finite elements method s and based on ANSYS, finite element model of landing gear's shock are constructed, the interaction between the shock strut and various appendices are simulated by the establishment of contact pairs, and impact by the setting of initial FKN has been discussed, summing up the key-point of contact analysis. The establishment method of shock strut constraints condition and the reasonable simplification and exert method to the load is also discussed in the article. The stress distribution for whole shock strut has been obtained in a special work instance by building up the parametric finite elements emulation computing platform. At the same time the theoretical calculation results of some spots on the shock strut are selected in this article. The theoretical calculation results are compared with the simulation results, and the comparison has confirmed the reliability of the simulation results. At last, combing the idea of optimal design, the shock strut medi-stem is optimized by using the optimization module of ANSYS software in view of the simulation results. As a result, the weight reduction is obtained with enough strength of the metal structure.