{"id":160603,"date":"2021-07-22T09:34:30","date_gmt":"2021-07-22T09:34:30","guid":{"rendered":"\/forum\/forums\/topic\/need-help-in-6dof-udf-with-a-face-loop\/"},"modified":"2021-07-27T13:43:53","modified_gmt":"2021-07-27T13:43:53","slug":"need-help-in-6dof-udf-with-a-face-loop","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/need-help-in-6dof-udf-with-a-face-loop\/","title":{"rendered":"Need help in 6dof udf with a face loop"},"content":{"rendered":"
\n
\n

Hello Dear,<\/p>\n

I hope this thread will find you well.<\/p>\n

I am doing a very simple test where i use 6dof udf but in that udf i want to get the velocity from the actual results. The main problem is complex but i receive the same error as shown below. I just want to have some results in my udf through looping or some other way which i do not know. I also wrote the UDF here below for reference. The thing is that when i do not use a loop then it works fine but i need to have a loop to get the velocity or some other variable from the results.<\/p>\n

I hope you understand the problem and give me feedback asap with your experience. Thank you.<\/p>\n

<\/p>\n<\/p>\n

UDF:<\/p>\n

\/************************************************** *****<\/p>\n

SDOF property compiled UDF with external forces\/moments<\/p>\n

************************************************** *****\/<\/p>\n

#include "udf.h"<\/p>\n

static real acc = 4.631;<\/p>\n

static real mass = 5;<\/p>\n

static real velocity;<\/p>\n

<\/p>\n

<\/p>\n

<\/p>\n

<\/p>\n<\/p>\n

DEFINE_SDOF_PROPERTIES(acce, prop, dt, time, dtime)<\/p>\n

{<\/p>\n

<\/p>\n

<\/p>\n<\/p>\n

prop[SDOF_MASS] =5;<\/p>\n

prop[SDOF_IXX] = 5.2e-5;<\/p>\n

prop[SDOF_IYY] = 4.1667e-3;<\/p>\n

prop[SDOF_IZZ] = 1;<\/p>\n

prop[SDOF_ZERO_TRANS_X] = False;\/* boolean, allow translation in x-direction *\/<\/p>\n

prop[SDOF_ZERO_TRANS_Y] = True; \/* boolean, suppress translation in y-direction *\/<\/p>\n

prop[SDOF_ZERO_TRANS_Z] = True; \/* boolean, suppress translation in z-direction *\/<\/p>\n

prop[SDOF_ZERO_ROT_X] = True; \/* boolean, suppress rotation around x-axis *\/<\/p>\n

prop[SDOF_ZERO_ROT_Y] = True; \/* boolean, suppress rotation around y-axis *\/<\/p>\n

prop[SDOF_ZERO_ROT_Z] = True; \/* boolean, allow rotation around z-axis *\/<\/p>\n

<\/p>\n

<\/p>\n<\/p>\n

{<\/p>\n

if(time >= 0) {<\/p>\n

Thread *f_thread;<\/p>\n

face_t f;<\/p>\n

velocity=0;<\/p>\n

begin_f_loop(f, f_thread)<\/p>\n

{<\/p>\n

velocity += F_U(f, f_thread);<\/p>\n

}<\/p>\n

end_f_loop(f, f_thread)<\/p>\n

<\/p>\n<\/p>\n

Message("
\nV1 %d \/n",velocity);<\/p>\n

<\/p>\n<\/p>\n

prop[SDOF_LOAD_F_X] = mass*acc;<\/p>\n

<\/p>\n<\/p>\n

}<\/p>\n

<\/p>\n<\/p>\n

}<\/p>\n

<\/p>\n<\/p>\n

}<\/p>\n

<\/p>\n

<\/p>\n<\/p>\n

Error:<\/p>\n

"V1 0 \/n<\/p>\n

=========================<\/p>\n

<\/p>\n<\/p>\n

==============<\/p>\n

================================================== ================================================== ============<\/p>\n

<\/p>\n<\/p>\n

Node 5: Process 20896: Receiv============================================ ==============<\/p>\n

========================================<\/p>\n

<\/p>\n<\/p>\n

Node 1: Proc=================ess 20948: Received signal ====================SIGSEGV.<\/p>\n

<\/p>\n<\/p>\n

================================================== ============================================<\/p>\n

=========================================<\/p>\n

<\/p>\n

<\/p>\n<\/p>\n

=============================Node 3: Process 20648: Received si=ed signal gn======================SIGSEGV.<\/p>\n

<\/p>\n<\/p>\n

================================================== =al SI========G===============================<\/p>\n

S==EG====V.<\/p>\n

=======<\/p>\n

<\/p>\n<\/p>\n

No======<\/p>\n

============<\/p>\n

<\/p>\n<\/p>\n

Node 0: Prde 2: Process 17612: Received sig=====================o========================= ========================================<\/p>\n

============ncess 1936: Received signal Sal SIGSEGV.<\/p>\n

<\/p>\n<\/p>\n

=========================IGSEGV.<\/p>\n

<\/p>\n<\/p>\n

================================================== ================================================== ========<\/p>\n

<\/p>\n<\/p>\n

Node 4: ===========Process 10852: Rece======ived signal SIGSEGV.===<\/p>\n

<\/p>\n

<\/p>\n<\/p>\n

================================================== =======================<\/p>\n

==================<\/p>\n

<\/p>\n<\/p>\n

999999: mpt_accept: error: accept failed: No such file or directory"<\/p>\n","protected":false},"template":"","class_list":["post-160603","topic","type-topic","status-closed","hentry","topic-tag-6dof-1","topic-tag-ansys","topic-tag-faceloop-1","topic-tag-fluent"],"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