例18 铝板分段焊焊接实例.docx
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例18铝板分段焊焊接实例
例18铝板分段焊焊接实例
MAIN
MESHGENERATION
NODES:
ADD(创建4个节点)
100
1.0500
1.050.050
10.050
ELEMENTS:
ADD(用上述4个节点创建单元)
2234
ENDLIST#
SUBDIVIDE(进行网格划分,采用疏密网格过渡)
DIVISIONS
20201
BIASFACTORS
1.3500
ELEMENTS
ALL:
EXISTING
RETURN
EXPAND
TRANSLATIONS
10-0.001
RPETITIONS10
ELEMENTS
ALL:
EXISTING
RETURN(创建的网格模型如下图)
SWEEP
ALL
RENUMBER
ALL
MATERIALPROPERTIES
NEW(定义母材和填充材料的材料性质)
HEATTRANSFER
CONDUCTIVITY240
SPECIFICHEAT880
MASSDENSITY2700
OK
ELEMENTS:
ADD
ALL:
EXISTING
RETURN
MODELINGTOOLS
WELDPATHS(创建焊接路径)
NEW
PATHINPUT:
NODES
NODES:
ADD(按图示选中焊接路径的起始点)
ENDLIST#
ORIENTATIONINPUTMETHOD
NODES:
ADD
4651
ENDLIST#(焊接路径如示)
RETURN
同样的方法定义焊接路径2、3
WEIDFILLER(选定填充材料)
NEW
NAME:
FILLER1
PARAMETERS:
MELTPOINTTEMP:
660
ELEMENTS:
ADD(选定图中所示的单元)
ENDLIST#
RETURN
按照上述方式选择填充材料2、3的单元
BOUNDARYCONDITIONS
NEW
NAME:
FLUX1(指定焊接热源为恒温热源)
BOUNDARYCONDITIONSTYPE
THERMAL:
MORE
VOLUMEWELDFLUX
FLUX
DIMENSIONS:
(定义焊缝的尺寸)
WIDTH:
0.005
DEPTH:
0.005
FORWARDLENGTH:
0.004
REARLENGTH:
0.01
MOTIONPARAMETER:
(指定热源的运动参数)
VELOCITY:
0.002
WELDPATH:
weldpath1
WELDFILLER:
weldfiller1
OK
ELEMENTS:
ADD
ALL:
EXISTING
ENDLIST#
RETURN
同样的方法定义焊接热源2、3
NEW
NAME:
film(指定与外界的对流交换)
BOUNDARYCONDITIONSTYPE
THERMAL:
FACEFILM
FILM
COEFFICIENT:
20
SINKTEMPERATYRE:
60
OK
FACES:
ADD
选定除填充材料以外的表面
ENDLIST#
RETURN(与外界热交换的边界条件如下图)
LOADCASES
NEW
HEATTRANSFER
TRANSIENT(定义载荷工况1,焊接第一段的过程)
LOADS:
FLUX1(on)
film(on)
OK
CONVERGENCETESTING
MAXERRORINTEMPERATUREESTIMATE:
50
OK
TOTALLOADCASESTIME:
5
FIXED:
CONSTANTTIMESTEP:
PARAMETER:
#STEP:
10
OK
OK
同样的方法定义载荷工况2、3
NEW
HEATTRANSFER
TRANSIENT(定义载荷工况2,焊后的冷却过程)
LOADS:
FLUX1(off)
FLUX2(off)
FLUX3(off)
film(on)
OK
CONVERGENCETESTING
MAXERRORINTEMPERATUREESTIMATE:
50
OK
TOTALLOADCASESTIME:
500
ADAPTIVE:
TEMPERATURE
PARAMETERS:
MAX#INCRENMENTS:
500
INITIALTIMESTEP:
1
OK
OK
JOBS
NEW
HEATTRANSFER
SELECTED:
lcases1
lcases3
lcases2
lcases4
INITIALLOADS:
FLUX1(on)
film(on)
OK
ELEMENTTYPE:
43
OK
ALL:
EXISTING
CHECK
RUN
下图为焊接过程中的温度场描述: