{"id":44915,"date":"2020-06-09T12:16:34","date_gmt":"2020-06-09T12:16:34","guid":{"rendered":"\/forum\/forums\/topic\/goldak-double-ellipsoid-heat-source-in-apdl\/"},"modified":"2020-06-09T12:16:34","modified_gmt":"2020-06-09T12:16:34","slug":"goldak-double-ellipsoid-heat-source-in-apdl","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/goldak-double-ellipsoid-heat-source-in-apdl\/","title":{"rendered":"Goldak Double ellipsoid heat source in APDL"},"content":{"rendered":"

Hi,<\/p>\n

<\/p>\n

I use an APDL command snippet to achieve a double ellipsoid according to Goldak equation, but the Temperature rise at the end of the welding line is strange and artificial.<\/p>\n

<\/p>\n

The APDL snippet is:<\/p>\n

<\/p>\n

 <\/p>\n

<\/p>\n

 <\/p>\n

<\/p>\n

 <\/p>\n

<\/p>\n

<\/p>\n

CMSEL,ALL<\/p>\n

<\/p>\n

*GET,EMAX,ELEM,,NUM,MAX<\/p>\n

<\/p>\n

*GET,EMIN,ELEM,,NUM,MIN<\/p>\n

<\/p>\n

ALLSEL<\/p>\n

<\/p>\n

 <\/p>\n

<\/p>\n

TIME_WELD=80<\/p>\n

<\/p>\n

DT=1<\/p>\n

<\/p>\n

A=0.003<\/p>\n

<\/p>\n

B=0.003<\/p>\n

<\/p>\n

C1=0.004<\/p>\n

<\/p>\n

C2=0.016<\/p>\n

<\/p>\n

TAU=0<\/p>\n

<\/p>\n

FF=0.6<\/p>\n

<\/p>\n

FR=1.4<\/p>\n

<\/p>\n

Q=1000<\/p>\n

<\/p>\n

VEL=1.73e-3<\/p>\n

<\/p>\n

 <\/p>\n

<\/p>\n

NPT=TIME_WELD\/DT<\/p>\n

<\/p>\n

NROPT, FULL<\/p>\n

<\/p>\n

 <\/p>\n

<\/p>\n

*DO,i,1,NPT,1<\/p>\n

<\/p>\n

WTIME=(i)<\/p>\n

<\/p>\n

TIME,WTIME<\/p>\n

<\/p>\n

 <\/p>\n

<\/p>\n

HCENTER=VEL*WTIME<\/p>\n

<\/p>\n

 <\/p>\n

<\/p>\n

*DO,jj,EMIN,EMAX,1<\/p>\n

<\/p>\n

 <\/p>\n

<\/p>\n

X=CENTRX(jj)<\/p>\n

<\/p>\n

Y=CENTRY(jj)<\/p>\n

<\/p>\n

Z=CENTRZ(jj)<\/p>\n

<\/p>\n

 <\/p>\n

<\/p>\n

CSI=-Z+VEL*(TAU-WTIME)<\/p>\n

<\/p>\n

 <\/p>\n

<\/p>\n

 <\/p>\n

<\/p>\n

*IF,Z,GT,HCENTER,THEN<\/p>\n

<\/p>\n

 <\/p>\n

<\/p>\n

C=C1<\/p>\n

<\/p>\n

F=FF<\/p>\n

<\/p>\n

 <\/p>\n

<\/p>\n

*ELSE<\/p>\n

<\/p>\n

 <\/p>\n

<\/p>\n

C=C2<\/p>\n

<\/p>\n

F=FR<\/p>\n

<\/p>\n

 <\/p>\n

<\/p>\n

*ENDIF<\/p>\n

<\/p>\n

 <\/p>\n

<\/p>\n

PART1=(6*(3**0.5)*F*Q)\/(A*B*C*3.14*(3.14**0.5))<\/p>\n

<\/p>\n

PART2=(exp(-3*(X\/A)**2))*(exp(-3*(Y\/\"B)\"**2))*(exp(-3*(CSI\/C)**2))<\/p>\n

<\/p>\n

 <\/p>\n

<\/p>\n

QF=PART1*PART2<\/p>\n

<\/p>\n

 <\/p>\n

<\/p>\n

BFE,jj,HGEN,,QF<\/p>\n

<\/p>\n

 <\/p>\n

<\/p>\n

*ENDDO<\/p>\n

<\/p>\n

 <\/p>\n

<\/p>\n

SOLVE<\/p>\n

<\/p>\n

 <\/p>\n

<\/p>\n

*ENDDO<\/p>\n

<\/p>\n

CMSEL,ALL<\/p>\n

<\/p>\n

BFEDELE,ALL,ALL<\/p>\n

<\/p>\n

ALLSEL<\/p>\n

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

<\/p>\n

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

<\/p>\n

This is when the Laser spot leaves the plate.<\/p>\n

<\/p>\n

Has anyone a suggestion what went wrong?<\/p>\n

<\/p>\n

Best regards<\/p>\n","protected":false},"template":"","class_list":["post-44915","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["17096"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":[null],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0"],"_btv_view_count":["3423"],"_bbp_subscription":["251834"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["44915"],"_bbp_forum_id":["27791"],"_bbp_engagement":["168520","177692","182156"],"_bbp_voice_count":["3"],"_bbp_reply_count":["3"],"_bbp_last_reply_id":["132836"],"_bbp_last_active_id":["132836"],"_bbp_last_active_time":["2020-11-12 08:23:50"]},"test":"stebir"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/44915","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/44915\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=44915"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}