NX Nastran一维梁单元的模态分析

环境： NX NASTRAN DESIGN - 结构

解法是 振动模式
------------------------------------------------------------
Mesh-Based Errors Summary
-------------------------

Total: 0 error and 0 warning

Material-Based Errors Summary
-----------------------------

Total: 0 error and 0 warning

Solution-Based Errors Summary
-----------------------------

Total: 0 error and 0 warning

Load/BC-Based Errors Summary
----------------------------

Total: 0 error and 0 warning

Nastran Model Check Completed”

解算时信息如下：

“============================================================
列出信息创建者：
日期 ： 2009-4-9 15:39:18
当前工作部件 ： E:\Platform\Frame_sim1.sim
节点名 ： 8e4744a03b0d
============================================================
*** 15:39:18 ***
Starting Nastran Exporter
*** 15:39:18 ***
Writing Nastran System section
*** 15:39:18 ***
Writing File Management section
*** 15:39:18 ***
Writing Executive Control section
*** 15:39:18 ***
Writing Case Control section
*** 15:39:18 ***
Writing Bulk Data section
*** 15:39:18 ***
Writing Nodes
*** 15:39:18 ***
Writing Elements
*** 15:39:18 ***
Writing Physical Properties
*** 15:39:18 ***
Writing Materials
*** 15:39:18 ***
INFORMATION : Reference temperature for material STEEL has been set to the solution's default temperature
*** 15:39:18 ***
Writing Loads and Constraints
*** 15:39:18 ***
Writing Coordinate Systems
*** 15:39:18 ***
Summary of Bulk Data cards written
+----------+----------+
| NAME | NUMBER |
+----------+----------+
| CBAR | 76 |
| CQUAD4 | 72 |
| EIGRL | 1 |
| GRID | 150 |
| MAT1 | 1 |
| MATT1 | 1 |
| PARAM | 6 |
| PBAR | 18 |
| PSHELL | 2 |
| SPC | 6 |
| TABLEM1 | 3 |
+----------+----------+
*** 15:39:18 ***
Nastran Deck Successfully Written”

我试着重新解算原来已处理过的方案，结果方案导航器中原有的“Results”结点也一下子消失了，期盼高手介绍一下原因。