摘要
针对因测点数目不足,难以全面了解冲击波传播过程,冲击波超压经验公式具有局限性;以及数值模拟存在精度低的问题,通过采用B样条插值算法,以实测数据重建冲击波超压场;其结果优于Delaunay三角化法和最小二乘法。利用Matlab仿真得出了冲击波超压场的等压线和三维分布;并对重建场进行了反演验证,结果表明其误差在4.5%内。
Aimed at the problem that inadequate numbers of measuring points can not acquire the propagation process of shock wave overall and the limitations of empirical formulate for overpressure and the low accuracy of numerical simulation,the actual data was utilized to fit resconstruction of shock ware overpressure filed based on Bspline interpolation and the result is better than the reconstruction based on Delaunay triangulation and least square method. The isobars and 3D distribution of explosion overpressure filed simulated by the Matlab are given out. The inversion results of the proposed resconstruction verified by actual measurement experiments shows that the errors are within 4. 5%.
出处
《科学技术与工程》
北大核心
2016年第7期236-240,共5页
Science Technology and Engineering
关键词
冲击波
超压
B样条插值
曲面拟合
场重建
shock wave
overpressure
B-spline interpolation
surface fitting
resconstruction of overpressure filed
