November 14, 2019 at 11:50 amS1d996Subscriber
Im doing a 3d simulation of a rod which involves 6DOF udf file in which the mass, external force and moment of inertia are involved.
Im applying the external force in the upward direction i.e; +ve Y Direction and gravitational acceleration in the downward direction i.e; -ve Y Direction. The outcome of the simulation is that the rod is moving downwards. The crossed checked the Applied External Force in +Y direction which is equal to 1g force
UDF FILE USED FOR SIMULATION:
DEFINE_SDOF_PROPERTIES(rod, prop, dt, time, dtime)
prop[SDOF_MASS] = 3.504 ;
prop[SDOF_IXX] = 2.110618;
prop[SDOF_IYY] = 1208.578814;
prop[SDOF_IZZ] = 1208.786357;
prop[SDOF_IXY] = 0.00085;
prop[SDOF_IXZ] = 0.000124156;
prop[SDOF_IYZ] = -0.000024;
if(time = 0 && time < 1.0)
prop[SDOF_LOAD_F_Y] += 34.37424;
prop[SDOF_LOAD_M_X] += 0.00000;
prop[SDOF_LOAD_M_Y] += 0.00000;
prop[SDOF_LOAD_M_Z] += 0.00000;
printf ("nrod: updated 6DOF properties");
and later I increased the Force to 2g and still the rod is moving downwards.
Can anyone help with the problem?
Thanks in advance
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