The magnetorheological damper mechanical properties and Gun Recoil
|School||Nanjing University of Technology and Engineering|
|Course||Weapons systems and the use of engineering|
|Keywords||Magneto-rheological Damper Finite Element Analysis Quasi-static Model Genetic Algorithm Parameter Identification Recoil mechanism Impact test|
As a new type of intelligent damper device, magneto-rheological(MR) damper has been increasingly widely used in various of vibration suppressions and did well. This dissertation bases on the MR damper and mainly includes the followings.1. Based on the finite element method, the magnetic circuit and the flow field of MR Mechanism were studied. Firstly through the ANSYS software to analysis the magnetic circuit and obtained the curve of the flux density in the gap with the current. Then, the flow field with different yield stress was studied and obtain the pressure difference. Lastly, studied the controllability of damping force and speed of the controlled area.2. Using the theory of hydrodynamic, a quasi-static model was established. Then, tensile test on the MR damper was investigated. The results of the test was used for the recognization of the quasi-static model. In this dissertation, the model was recognized by genetic algorithms for the strongly non-linear reason. The recognized model reflects the mechanical characteristics of the MR damper.3. Study the effect of Gun Anti-Recoil Mechanism equipped with MR damper. The artillery recoil process was simulated numerically.In this Process, the flow inertia of the MR fluid was considered and the fluid dynamics equation of the MR damper was solved by the finite difference method. The simulation results shown that it’s necessary to consider the flow inertia in high speed impact field and through controlling current, we can get the purpose to controll the recoil displacement and the Peak Value of the recoil resistance and speed.4. In order to investigate the controllability of the MR damper on the condition of impact, a impact test was done.Finally the work of this dissertation was concluded. The innoviations and contribution of this work were introduced. And also, the potential issues of this research were pointed out.