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[求助]
求大神們幫我解讀這個UDF的意思DEFINE_SDOF_PROPERTIES 已有4人參與
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/******************************************************* SDOF property compiled UDF with external forces/moments *******************************************************/ #include "udf.h" DEFINE_SDOF_PROPERTIES(delta_missile, prop, dt, time, dtime) { prop[SDOF_MASS] = 907.185; prop[SDOF_IXX] = 27.116; prop[SDOF_IYY] = 488.094; prop[SDOF_IZZ] = 488.094; /* add injector forces, moments */ { register real dfront = fabs (DT_CG (dt)[2] - (0.179832*DT_THETA (dt)[1])); register real dback = fabs (DT_CG (dt)[2] + (0.329184*DT_THETA (dt)[1])); if (dfront <= 0.100584) { prop[SDOF_LOAD_F_Z] = 10676.0; prop[SDOF_LOAD_M_Y] = -1920.0; } if (dback <= 0.100584) { prop[SDOF_LOAD_F_Z] += 42703.0; prop[SDOF_LOAD_M_Y] += 14057.0; } } printf ("\ndelta_missile: updated 6DOF properties" ;} 這是fluent幫助里面的一個例子,前面的質(zhì)量和轉動慣量我知道跑,后面加外力的我實在看不懂,求解讀 |
銀蟲 (小有名氣)
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#include "udf.h" DEFINE_SDOF_PROPERTIES(delta_missile, prop, dt, time, dtime) { prop[SDOF_MASS] = 907.185; prop[SDOF_IXX] = 27.116; prop[SDOF_IYY] = 488.094; prop[SDOF_IZZ] = 488.094; /* add injector forces, moments */ { register real dfront = fabs (DT_CG (dt)[2] -(0.179832*DT_THETA (dt)[1])); //定義dfront為實型變量,并放入寄存器加速運輸, //DT_CG (dt)[1],DT_CG (dt)[2],物體幾何中心xc,yc //DT_THETA (dt)[1],DT_THETA (dt)[2],物體x,y方向的轉角。 register real dback = fabs (DT_CG (dt)[2] +0.329184*DT_THETA (dt)[1])); if (dfront <= 0.100584) { prop[SDOF_LOAD_F_Z] = 10676.0; prop[SDOF_LOAD_M_Y] = -1920.0; //SDOF_LOAD_F_Z:z方向的力 //SDOF_LOAD_M_Y:y方向的力矩 } if (dback <= 0.100584) { prop[SDOF_LOAD_F_Z] += 42703.0; prop[SDOF_LOAD_M_Y] += 14057.0; } } printf ("\ndelta_missile: updated 6DOF properties" ; |

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