Structural Design And Dynamic Analysis Of Floating Locking Mechanism

With the development of technology,simulated emission of indoor instead of outdoor real launch is becoming more and more important for research and development.The buffer of kinetic energy launcher is usually tested under the condition of outdoor live firing.The main assessment index is based on the impulse value obtained.The test cost is high,the process is complex,and the data acquisition and processing is difficult.The simulation launcher will solve the above deficiencies.The floating locking mechanism is an important mechanism in simulating the impulse process of the analog launcher.It is mainly composed of floating piston and the locking key,the floating piston has been replaced projectile and the locking key is used to completing the locking task.The key to ensure the continuous operation of the analog launcher is to study the axial precise locking of the floating piston and to unlock it in time.First of all,kinetic energy projectile launcher’s movement situation,parts function and some important parameters,as a theoretical basis for the design of an analog launcher,are detailed analyzed.The movement and important indexes of the key parts in the floating locking mechanism are summarized.Secondly,based on the analysis results of the floating locking mechanism movement,two kinds of locking schemes applied to this sport situation are proposed.The most suitable scheme is selected through comparative analysis,and the differential theory used in the selected scheme is explained in detail.After the analysis of the scheme,a three-dimensional model of the floating locking mechanism based on the principle of differential theory is built,and the virtual assembly verification is carried out.The dynamic theoretical analysis of the floating locking mechanism is carried out,and the dynamic model of the cylinder body and the floating piston dynamic model are established respectively.The three force sources provided by the exciter are used as the dynamic input to do the single work calculation.The calculation results show that the impulse produced by the three force sources basically meets the requirements of the cylinder.Based on the first force source,a continuous cycle working kinetics with time interval of 65 ms and 90 ms is calculated.The calculation results show that the impulse of the force source to the cylinder body is 190——220N.S,basically meets the requirements and is in good agreement.Finally,the dynamic simulation experiment was carried out to verify the dynamic simulation of the floating lock mechanism.The dynamics simulation model of ADAMS is established,through the simulation experiment,the movement relation of the important parts of the floating locking mechanism working with time is verified.The simulation results show that the designed floating locking mechanism basically meets the requirements of the index,and is consistent with the theoretical calculation.Through the modal analysis,the frequency that affects the stable and reliable circulation of the floating lock mechanism is found out,and the whole mechanism should avoid working at this frequency.