Definition of a consistent system of units (required for LS-DYNA): 1 force unit = 1 mass unit * 1 acceleration unit 1 力单位 = 1 质量单位 × 1 加速度单位 1 acceleration unit = 1 length unit / (1 time unit)^2 1 加速度单位 = 1 长度单位/1 时间单位的平方 The following table provi...
对于显式计算,由于其n+1/2(对应的矩阵)和n+1(对应的矩阵)几乎相同,所以不需要进行精度的额外控制。对于时间步长超过了1000倍的隐式分析,*CONTROL_ACCURACY就很重要了;如果计算模型中有旋转的物体,那就必须使用这一设置。 二、统一单位制(Consistent units) 在LS-DYNA中需要设置统一的单位制: 1 force unit = ...
相信做仿真分析的人第一个需要明确的就是一致单位系统(Consistent Units)。计算机只认识0&1、只懂得玩数字,它才不管你用的数字的物理意义。而工程师自己负责单位制的统一,否则计算出来的结果没有意义,不幸的是大多数老师在教有限元数值计算时似乎没有提到这一点。见下面LS-DYNA FAQ中的定义: Definition of a con...
对于时间步长超过了1000倍的隐式分析,*CONTROL_ACCURACY就很重要了;如果计算模型中有旋转的物体,那就必须使用这一设置。 二、统一单位制(Consistent units) 在LS-DYNA中需要设置统一的单位制: 1 force unit = 1 mass unit * 1 acceleration unit 1 acceleration unit = 1 length unit / (1 time unit)^2 1...
LS-DYNA_Units单位设定 Consistent units Definition of a consistent system of units (required for LS-DYNA):1 force unit = 1 mass unit * 1 acceleration unit 1 acceleration unit = 1 length unit / (1 time unit)^2 The following table provides examples of consistent systems of units. As points...
1.Consistentsystemofunits单位制度 相信做仿真分析的人第一个需要明确的就是一致单位系统(ConsistentUnits)。计算机只认识0&1、只懂得玩数字,它才不管你用的数字的物理意义。而工程师自己负责单位制的统一,否则计算出来的结果没有意义,不幸的是大多数老师在教有限元数值计算时似乎没有提到这一点。见下面LS-DYNAFAQ中...
二、统一单位制（Consistent units） 在LS-DYNA中需要设置统一的单位制： 1 force unit = 1 mass unit * 1 acceleration unit 1 acceleration unit = 1 length unit / (1 time unit)^2 &...
Conclusion: LS-DYNA doesn't have a default system of units. User needs to input material properties and physical dimensions according to a consistent system of units as per their choice. This warrants that to use LS-DYNA in different circumstances, users have to be conversant with converting qu...
1.4 (AIRBAG) LS-DYNA Version 970 Update VARIABLE PE RO GC LCEFR POVER PPOP OPT KNKDN IOC IOA *AIRBAG DESCRIPTION Ambient pressure Ambient density Gravitational conversion constant (mandatory - no default). If consistent units are being used for all parameters in the airbag definition then ...
Consistent units Modeling guidelines for full vehicle contact From engineering to true strain, true stress Do you have tips how to to combat instabilities? Negative volumes in brick elements Knowledge Base Home Still stuck or need help? Submit a Support Request...