飞板运动规律的特征线差分方法研究

在经典理论及公式的基础上利用特征线数值插分方法对飞板运动规律进行研究。在差分过程中对于滑移爆轰飞板抛掷问题进行模型化时，将炸药与空气界面视为炸药与真空界面；在对声速面进行处理时采用简单弱爆轰假设。采用特征线法差分格式，编制程序对飞板二维抛掷问题进行数值求解，在爆炸焊接中常用的炸药质量比与炸药γ值范围，采用最小二乘法对数值计算结果进行拟合。

Flier plate role research with difference method in characteristic line

On the basis of classic theory and fo rmula, the f lier plate actio n rule w as fi rst studied w ith the method of the numerical dif ference in cha racteristic line. In the di fference course, the interface betw een cha rg e and ai r w as reg arded as that betw een charge and v acancy when modeling the throwing out o f the f lier plate in the sliding deto nation. Simple feeble deto natio n assumptio n was adopted in dealing w ith the sound v elocity surface. Adopting the di fference fo rmat o f characteri stic line, a procedure w as w orked out to numerically calculte tw o dimensio n throw ing out action of flier plate. In the range of commo n cha rg e mass ratio and Vin ex plosiv e w elding , least squa re method w as adopted to fi t the result s o f calculation va lue.