{"id":361023,"date":"2024-04-08T08:58:47","date_gmt":"2024-04-08T08:58:47","guid":{"rendered":"\/forum\/forums\/topic\/moment-along-z-axis-at-base-or-cg-of-water-tank-for-2-secs\/"},"modified":"2024-04-08T08:58:47","modified_gmt":"2024-04-08T08:58:47","slug":"moment-along-z-axis-at-base-or-cg-of-water-tank-for-2-secs","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/moment-along-z-axis-at-base-or-cg-of-water-tank-for-2-secs\/","title":{"rendered":"moment along z axis at base or CG of water tank for 2 secs"},"content":{"rendered":"

i want to apply a moment around z axis of a partially filled tank at its base or CG, after compiling while i am hooking this UDF under dynamic mesh, In base as rigid body  its showing incorrect CG motion(Assume No motion)<\/p>\n

\n
#include “udf.h”<\/div>\n

<\/p>\n

DEFINE_SDOF_PROPERTIES(tank_moment, prop, dt, time, dtime)<\/div>\n
{<\/div>\n
    real t = CURRENT_TIME; \/\/ Obtain the current simulation time<\/div>\n

<\/p>\n

   <\/div>\n
    prop[SDOF_LOAD_M_Z] = 0.0; \/\/ Initialize moment load to 0.0<\/div>\n

<\/p>\n

    if (t <= 2.0)<\/div>\n
    {<\/div>\n
     <\/div>\n
        prop[SDOF_LOAD_M_Z] = 5000.0; \/\/ Moment load in the z-direction<\/div>\n
    }<\/div>\n

<\/p>\n

    printf(“\\ntank_moment: updated SDOF properties”);<\/div>\n
}<\/div>\n<\/div>\n","protected":false},"template":"","class_list":["post-361023","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t