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Post by: TesterTS on January 02, 2012, 07:12:25 PM
Last days I worked at one verification task. The deal is the common (not simple) samples of engineering analysis there are in Samples+ library which are available from Start Page of TS (TIMO Structural). I decided to test one of them by comparison with Autodesk Robot Structural Analysis (RS) – famous the world class software for structural analysis in Civil Engineering and many fields also. As I understand I can do it for my educational purposes within student license. From start point I was planning to test with goal to present one-two of my successful or not successful results, but such educational training became so thrill that I am going to present a series of post here. Today I will try to present reactions values in task. For better view the button Pres is pressed.
The sample is next (please see it in Samples+ library):
(http://www.orlovsoft.com/Testers/images/img_01.png)
It is interesting to notice that TS has not highlighting of physical magnitude value’s dimension. As I understand it means that I can use any standard dimensions for my private goals. Therefore the sample’s input values I will understand as SI values (SI - Le Système International d'Unités). By this way beam’s geometry and material characteristics are following:
| Characteristics | Value | Dimension |
| Moment Inertia | Ix=25.132∙10-8 | m4 |
| Moment Inertia | Iy=12.566∙10-8 | m4 |
| Moment Inertia | Iz=25.132∙10-8 | m4 |
| Cross-section area | A=12.566∙10-4 | m2 |
| Shear Modulus | G=7.884615∙1010 | N/m2[Pa] |
| Young Modulus | E=2.050000∙1011 | N/m2[Pa] |
External loading type and values are in next table.
| Distributed Force along X Axis | 400 | N/m |
| Distributed Force along Y Axis | -500 | N/m |
| Distributed Force along Z Axis | -700 | N/m |
| Concentrated Force | Fy=-15000 | N |
| Concentrated Force | Fx=(±)2000 two points with different directions | N |
| Concentrated Moment | Mx=5000 | Nm |
TIMO Nodes numeration and reactions values are demonstrated directly by next figure.
(http://www.orlovsoft.com/Testers/images/img_03.png)
The scheme of the same construction in RS is presented below
(http://www.orlovsoft.com/Testers/images/img_RS_01.png)
It is important to notice that local coordinates for beam (rod) are different in systems. This feature is demonstrated by figures below
(http://www.orlovsoft.com/Testers/images/img_RS_02.png)
(http://www.orlovsoft.com/Testers/images/img_04.png)
As we see in RS the center line of a bar is X Axis, but it is Z Axis in TS. Vertical Beam Axis is Z Axis in RS and Y Axis in TS.
Possibly as I suppose it will be better to take into account to developers of TS to correspond to RS rules concerning directions. TS rules work in Russian universities (books and traditions) although.
As we see in Reactions table in RS it uses by my choice kN and kNm dimensions for forces and moments.
(http://www.orlovsoft.com/Testers/images/img_RS_03.png)
Therefore I will divide TS reactions values to 103 for direct comparison. Also I must detect Nodes numeration correspondence. The next table shows such equivalence exactly because.
| RS Nodes | TS Nodes |
| 6 | 7 |
| 3 | 3 |
| 1 | 2 |
| 9 | 9 |
Taking into account nodes numeration as well as axes directions in both systems I will put values as is for correct comparison. The forces results are following:
| RS, kN | TS, kN |
| Rx = 3,948512972 (Node 6) | Rz = 3,949047788291382 (Node 7) |
| Ry = 9,431097880 | Rx = 9,431258443051716 |
| Rz = -126,368281523 | Ry = -126,36913910101952 |
| Rx = 113,751588746 (Node 3) | Rz = 113,75102540635972 (Node 3) |
| Ry = 0,955669276 | Rx = 0,955835496580183 |
| Rz = -256,238467839 | Ry = -256,23759062304057 |
| Rx = 101,317621006 (Node 1) | Rz = 101,3174577909848 (Node 2) |
| Ry = -67,953524947 | Rx = -67,95365476811648 |
| Rz = 247,216506030 | Ry = 247,2157158446303 |
| Rx = 19,786662736 (Node 9) | Rz = 19,78680811016134 (Node 9) |
| Ry = -78,892891043 | Rx = -78,89305147075273 |
| Rz = 335,964804375 | Ry = 335,965558809243 |
And for moments the values are following:
| RS, kNm | TS, kNm |
| Mx = -9,191448732 (Node 6) | Mz = -9,191647925078489 (Node 7) |
| My = -13,384826760 | Mx = -13,38427486263303 |
| Mz = 2,944739622 | My = 2,9449083724587917 |
| Mx = -7,099172983 (Node 3) | Mz = -7,099369842015649 (Node 3) |
| My = 49,279635738 | Mx = 49,27904884304909 |
| Mz = 2,259545367 | My = 2,259717088932388 |
| Mx = 26,521285181 (Node 1) | Mz = 26,521543211808705 (Node 2) |
| My = 46,506033951 | Mx = 46,50551287242521 |
| Mz = 1,910751565 | My = 1,910927763794074 |
| Mx = 27,704755699 (Node 9) | Mz = 27,70501556869212 (Node 9) |
| My = -11,373474091 | Mx = -11,372992020209767 |
| Mz = 2,594623772 | My = 2,5947972952421255 |
Post by: rocketTester on January 23, 2012, 02:35:53 AM
Quote
As we see in RS the center line of a bar is X Axis, but it is Z Axis in TS. Vertical Beam Axis is Z Axis in RS and Y Axis in TS.As I understand there is one important thing you are detecting before comparison analysis two systems: Axes rules for RS and TS.
Results are really good. But what about other kind of data?
RS gives multiple tables and diagrams for each factor.
By the way I am going to test TS in few very simple tasks...
Post by: Pformadisa on October 15, 2014, 11:23:11 AM