电磁发射轨道受余割函数磁压力动态响应

Dynamic influence of electromagnetic gun launch track under magnetic pressure of cosecant function

解决电磁发射轨道受阻尼力作用而导致的使用寿命短和发射精度不高的问题,采用积分变换及其逆变换等方法推导出简谐压力作用下轨道的瞬态响应解析解.结果表明:材料应变阻尼系数、粘滞外阻尼系数、弹性系数对轨道梁挠度产生的影响呈现周期性的变化,在一个周期内,轨道梁的挠度随着粘滞外阻尼系数的增大而减小.随着材料应变阻尼系数的增大而增大.而弹性系数对挠度的影响不太明显,挠度曲线随着弹性系数的增加而呈下降的趋势.该成果对优化电磁发射装置的性能和提高发射精度提供了充足的理论依据.

In order to overcome the problems of short service life and low launching accuracy associated with the electromagnetic lunch track caused by damping force,this paper derives a transient response analytical solution of the track under the harmonic pressure using integral transform and inverse transform methods.The results of numerical examples with MATLAB software show that the track beam deflection shows cyclical changes under the impact of material strain damping,viscous external damping coefficient and elasticity coefficient.In a cycle,the track deflection decreases with the increase of the viscous outer damping,and increases with the increase of the material response of damping.The effect of elasticity coefficient is less obvious,and the deflection curve shows a downward trend with the increase of the elasticity coefficient.The study results provide an adequate theoretical basis for optimizing electromagnetic launcher performance and improving launching precision.