Modelling Method of Buffer and Anti-Recoil Effects in Vertical Ejection Systems
Aiming at the negative effects on launch performance and position caused by buffering and ejection recoil in the process of vertical ejection,a method was proposed to calculate the buffer force-compression relation model according to the plastic strain energy-compression relation curve of the buffer,which could effectively avoid the fitting drift caused by the fluctuation of buffer force.Based on this,a linear elastic-plastic spring model for simulating buffers was constructed.Based on the ejection experi-mental data,the dynamic data of anti-recoil effect were inverted,based on which a nonlinear viscoelas-tic-plastic spring model was constructed to simulate the anti-recoil effect.By combining force ele-ments,state variables and the Newton iteration method,effective solutions were achieved for the afore-mentioned models in a dynamic model.The simulation results show that the calculation of the two models are stable and efficient as the buffering characteristics are highly consistent with the finite ele-ment simulation results,and the anti-recoil effect is in good agreement with the experimental data,which verifies the effectiveness of the data processing method and the credibility of the modeling method.It provides a stable and credible modeling idea for subsequent ejection dynamics simulation with buffering and anti-recoil effects.
万方数据
维普
