Joint Identificationon Experiment Of Numeric Control Machine And Dynamic Optimization Of Its Main Structure

Numerical control technology is one of most important, it relates to national strategic position and the level of Comprehensive national strength. The main direction of numerical industry in Developed countries is that the numerical equipments turn fast and efficient. Dynamic and static characteristic of the main system is the key factor of production. So it required to establish accurate element model.In this paper does research on quick model building and optimum design for numerical control machine . Bring out a useful method on testing the actual contact ratio of joints, which is base on relative displacement of vibration. Lots of useful data on tangency ratio of joints in several normal conditions can also be found in this paper. User element in ANSYS is used to deal with joint.In this paper, structure modification based upon unit volume energy is researched. Basically, the method is developed according to sensitivity analysis. The unit volume energy criterion of weak substructures of a structure system is proposed. In present method, direct sensitivity calculation is neglected and modification is carried out with the physical parameters of identified weak substructures. Additionally, the constraint condition of maintaining the weight of whole structure invariable is well satisfied.Both structure modification based upon unit volume energy and the basic characteristic parameter of the joint identified by experiment were applied in the finite element calculation based on tablet machine.