| 查看: 1228 | 回复: 1 | |||
[求助]
AYSYS中怎么施加不同模态施加阻尼比呢？ 已有1人参与
|
| ANSYS中使用的多是用定值阻尼比，如果我知道了不同阶阵型的阻尼比，请问在ANSYS要怎么加呢？ |
回复此楼» 猜你喜欢
伙伴们，祝我生日快乐吧
已经有5人回复
-
274求调剂0856材料化工
已经有10人回复
-
337一志愿华南理工0805材料求调剂
已经有6人回复
-
（081700）化学工程与技术-298分求调剂
已经有7人回复
-
材料与化工304求B区调剂
已经有5人回复
-
NSFC申报书里申请人简历中代表性论著还需要在申报书最后的附件里面再上传一遍吗
已经有9人回复
-
一志愿北京化工大学材料与化工296分求调剂
已经有17人回复
-
0703化学一志愿211 总分320求调剂
已经有3人回复
-
0703求调剂
已经有6人回复
-
一志愿天津大学材料与化工275求调剂
已经有22人回复
klzg77541812
专家顾问 (正式写手)
NVH-FEA工程师
- 应助: 117 (高中生)
- 金币: 2141.8
- 红花: 28
- 帖子: 621
- 在线: 606.2小时
- 虫号: 1479383
- 注册: 2011-11-06
- 性别: GG
- 专业: 固体力学
- 管辖: 计算模拟区
【答案】应助回帖
感谢参与，应助指数 +1
|
在workbench中可以通过analysis setting 中的 Stiffness Coefficient Defined By. Define the Stiffness Coefficient by entering a value, Direct, or by entering a Frequency and a Damping Ratio, Damping vs. Frequency. 输入阻尼随频率变化表 在MAPDL中，需要通过table进行设置，然后再定义 When specifying frequency dependent damping using TB,SDAMP you must specify the material property using TB,ELAS. 如果针对每一阶模态，用下面的命令，看帮助很容易，V1...代表不同阶次，大于6个模态的话，STLOC每次+6，第一次是1开始，第二次是7，第二次用的时候，V1就代表第7阶了 MDAMP MDAMP, STLOC, V1, V2, V3, V4, V5, V6 Defines the damping ratios as a function of mode. SOLUTION: Dynamic Options Valid Products: DesignSpace | Pro | Premium | Enterprise | PrepPost | Solver | AS add-on STLOC Starting location in table for entering data. For example, if STLOC = 1, data input in the V1 field applies to the first constant in the table. If STLOC = 7, data input in the V1 field applies to the seventh constant in the table, etc. Defaults to the last location filled + 1. V1, V2, V3, . . . , V6 Data assigned to six locations starting with STLOC. If a value is already in this location, it will be redefined. Blank values for V2 to V6 leave the corresponding previous value unchanged. Notes Defines the damping ratios as a function of mode. Table position corresponds to mode number. These ratios are added to the DMPRAT value, if defined. Use the STAT command to list current values. This command applies to mode-superposition harmonic (ANTYPE,HARMIC), mode-superposition linear transient dynamic (ANTYPE,TRANS), and spectrum (ANTYPE,SPECTR) analyses. Repeat the MDAMP command for additional constants (10000 maximum). 简单的案例如下 FINISH /CLEAR *ABBR,RUN,M1 /PREP7 ET,1,16 R,1,1,0.02 MP,EX,1,2E11 MP,DENS,1,7800 MP,NUXY,1,0.3 N,1 N,11,10 FILL E,1,2 EGEN,10,1,-1 D,1,ALL FINISH /SOLU ANTYPE,MODAL MODOPT,LANB,10 MXPAND,10,,,YES,,NO SOLVE FINISH /POST1 FINISH /SOLU ANTYPE,TRANS TRNOPT,MSUP,6 MDAMP,1,0.01,0.01,0.01,0.01,0.01,0.01 ! MDAMP,1,0.1,0.1,0.1,0.1,0.1,0.1 DELTIM,0.0001,0.0001,0.0001 F,11,FY,0 SOLVE TIME,0.01 F,11,FY,-100 SOLVE TIME,0.02 F,11,FY,0 SOLVE TIME,1 SOLVE FINISH /POST26 FILE,FILE,RDSP NSOL,2,11,U,Y PLVAR,2 |
2楼2019-04-01 11:30:45
20