【讨论】amplitude boundary

firelovers

Data lines to prescribe boundary conditions using the "direct" format:
First line:
1. Node number or node set label.
2. First degree of freedom constrained.
3. Last degree of freedom constrained. .
   The following data item is necessary only when nonzero boundary conditions are specified as history data. Any magnitude given will be ignored when the boundary conditions are given as model data.
4. Actual magnitude of the variable (displacement, velocity, or acceleration). This magnitude will be modified by an amplitude specification if the AMPLITUDE parameter is used.  
不知那位大侠能告诉我第4个值代表什么确切的含义,好象大概意思看出来,但具体处理问题时有点拿不准,谢谢了

yzf1111

应该是 边界值吧，如2方向位移2cm，输入2即可