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1、1.*CONSTRAINED_GLOBAL全局约束Purpose:Defineaglobalboundaryconstraintplane.定义一个全局平面边界约束TCTranslationalConstraint:平动约束EQ.1:constrainedxtranslation,EQ.2:constrainedytranslation,EQ.3:constrainedztranslation,EQ.4:constrainedxandytranslations,EQ.5:constrainedyandztranslations,EQ.6:constrain
2、edxandztranslations,EQ.7:constrainedx,y,andztranslations,RCRotationalConstraint:转动约束EQ.1:constrainedx-rotation,EQ.2:constrainedy-rotation,EQ.3:constrainedz-rotation,EQ.4:constrainedxandyrotations,EQ.5:constrainedyandzrotations,EQ.6:constrainedzandxrotations,EQ.7:constrainedx,y,and
3、zrotations.DIRDirectionofnormal正常的方向EQ.1:globalx,EQ.2:globaly,EQ.3:globalz.Xx-offsetcoordinatex方向偏移坐标Yy-offsetcoordinatey方向偏移坐标Zz-offsetcoordinatez方向偏移坐标Remarks:Nodeswithinamesh-size-dependenttoleranceareconstrainedonaglobalplane.Thisoptionisrecommendedforusewithr-methodadaptivere
4、meshingwherenodalconstraintsarelostduringtheremeshingphase.节点网格大小的依赖公差限制在全局坐标平面上，这个选项要求使用在适应的重新划分节点约束消失在重新划分阶段。zyxzx举例说明：(多用在对称面处)*CONSTRAINED_GLOBAL*CONSTRAINED_GLOBAL151X平动Y、Z转动X法线方向343Z平动X、Y转动Z法线方向2.*SECTION_SPHSPH属性设置Purpose:DefinesectionpropertiesforSPHparticles.定义SPH粒子的属性SEC
5、IDSECIDisreferencedonthe*PARTcard.Auniquenumberorlabelnotexceeding8charactersmustbespecified.使用特定的PART编号，其号码字符不能超过8个字符。CSLHConstantappliedtothesmoothinglengthoftheparticles.Thedefaultvalueappliesformostproblems.Valuesbetween1.05and1.3areacceptable.Takingavaluelessthan1isinadmissib
6、le.Valueslargerthan1.3willincreasethecomputationaltime.Thedefaultvalueisrecommended.该常数用于设置光滑粒子长度，默认值应用于大部分问题。设定值在1.05~1.3之间是可行的，值小于1不可行，值大于1.3会增加计算时间，建议取默认值。HMINScalefactorfortheminimumsmoothinglength(SeeRemark1)设置最小光滑长度的比例因子HMAXScalefactorforthemaximumsmoothinglength(SeeRemark1)
7、设置最大光滑长度的比例因子SPHINIOptionalinitialsmoothinglength(overridestruesmoothinglength).ThisoptionappliestoavoidLS-DYNAtocalculatethesmoothinglengthduringinitialization.Inthiscase,thevariableCSLHdoesn'tapply.选择初始的光滑长度（覆盖初始的光滑长度），这个选项用于避免LS-DYNA在初始化过程中计算光滑长度。在这种情况下，CSLH的作用就会失效。DEATHTimeimp
8、osedSPHapproximationisstopped.SPH
