Missile Datcom基础应用及二次开发

Oler 2023年7月24日浏览：1525

Missile Datcom 软件的全称为Missile Data Compendium，是由美国空军飞行力学实验室开发的一款气动力工程计算软件。弹道计算时需要获得弹体在不同马赫数、海拔、速度等条件下飞行时的气动力系数。

一般可以使用数值算法和工程算法两种方式

（1）数值算法：利用 Fluent、CFD++ 等软件进行一系列复杂的前处理、求解器设置及后处理才可以进行计算，缺点显而易见，既考验使用者 Fluent、CFD++ 等软件的使用能力，又对电脑cpu等硬件的性能设置了门槛，普通的台式和笔记本难以堪当此任。

（2）工程算法：利用经验数据、实验数据及数学公式对弹体的气动力系数进行求解，Missile Datcom 软件就是应用了此种方式，优点：对使用者极其友好，通过看使用说明手册即可快速上手进行求解计算，并且计算速度快、对电脑配置没有要求，普通的笔记本、台式就可以。

Missile Datcom输入文件格式：

DERIV RAD

DIM M

$FLTCON

NALPHA = 11.0,

ALPHA = -5.0,-4.0,-3.0,-2.0,-1.0,0.0,1.0,2.0,3.0,4.0,5.0,6.0,

NMACH = 10.0,

MACH = 0.650,0.700,0.750,0.800,0.850,0.930,1.100,1.500,2.000,2.500,

ALT = 0.00,0.00,0.00,0.00,0.00,0.00,0.00,0.00,0.00,0.00,

$END

$REFQ

SREF = 0.011310,

LREF = 0.120000,

XCG = 0.422900,

RHR = 400.000000,

$END

$AXIBOD

NX = 31.0,

X = 0.00000000,0.00382000,0.00938000,0.01400000,0.01846000,

0.02434000,0.03189000,0.04020000,0.04587000,0.05175000,

0.05454000,0.06392000,0.07687000,0.08947000,0.10753000,

0.15606000,0.18021000,0.20110000,0.22328000,0.25164000,

0.28746000,0.31408000,0.34530000,0.37658000,0.40578000,

0.43903000,0.46965000,0.50304000,0.53643000,0.60281000,

0.70490000,

R = 0.00359000,0.00636000,0.00918000,0.01121000,

0.01323000,0.01524000,0.01599000,0.01682000,0.01870000,

0.02063000,0.02156000,0.02156000,0.02763000,0.03276000,

0.03899000,0.05079000,0.05493000,0.05781000,0.05936000,

0.05969000,0.05781000,0.05493000,0.05025000,0.04459000,

0.03898000,0.03276000,0.02574000,0.02155000,0.01737000,

0.01737000,0.01737000,

$FINSET1

SECTYP = HEX,

NPANEL = 8.,

PHIF = 0.00,45.00,90.00,135.00,180.00,225.00,270.00,315.00,

XLE = 0.640,

SWEEP = 13.4,13.4,60.0,60.0,

SSPAN = 0.017,0.030,0.036,0.049,

0.054,

CHORD = 0.065,0.067,0.065,0.044,

0.026,

STA = 0.0,0.0,0.0,0.0,

0.0,

ZUPPER = 0.003000,0.003000,0.003000,0.003000,

0.003000,

LFLATU = 0.065000,0.067000,0.065000,0.044000,

0.026000,

$END

*SAVE

DAMP

SPIN

PART

*SOSE

NEXT CASE

实际运行时需要根据需要修改 for005.dat 文件，软件运行完成后，文件夹中出现许多文件，汇总的气动力系数结果文件为 for042.csv 中，使用者可对照使用手册将所需的气动力系数挑选出来。此外，如果想要查看 for005.dat 中建立好的模型，可使用 Tecplot 打开 for022.dat 文件即可看到模型的三维效果图。

本人针对Missile Datcom软件进行了二次开发，可以对计算后的气动力系数进行统计，形成固定格式文档，以便进行弹道计算使用。

实际效果如下图所示，使用中有问题可联系本人QQ解决。