Mifano ya modeli halisi kwa uchanganuzi wa eigenvalue¶
Modeli za uchanganuzi¶
Jedwali 9.3.1 linaonyesha orodha ya mifano ya uthibitishaji ya modeli halisi kwa uchanganuzi wa eigenvalue. Kati ya hizi, maumbo ya modeli za EX07 (turbine rotor) na EX08 (spring) yanaonyeshwa katika Michoro 9.3.1 na 9.3.2. Maumbo ya modeli nyingine ni sawa na yale ya mifano ya uthibitishaji ya elastic static analysis yenye maudhui yanayolingana, na tayari yameonyeshwa. Kumbuka kuwa solver ya direct method inahitajika kando ili kuendesha mifano ya element type 731 na 741.
Jedwali 9.3.1 Mifano ya uthibitishaji ya modeli halisi kwa uchanganuzi wa eigenvalue
| Jina la kesi | Element type | Modeli ya uthibitishaji | Idadi ya nodi | Idadi ya degree of freedom |
|---|---|---|---|---|
| EX06 | 342 | Turbine blade | 10,095 | 30,285 |
| EX07 | 361 | Turbine rotor | 127,440 | 382,320 |
| EX08 | 342 | Spring | 78,771 | 236,313 |
| EX09 | 741 | Cylindrical shell | 10,100 | 60,600 |
| EX10A | 731 | Wine glass (coarse) | 7,240 | 43,440 |
| EX10B | 731 | Wine glass (medium) | 48,803 | 292,818 |
Mchoro 9.3.1 Turbine rotor (EX07)
Mchoro 9.3.2 Spring (EX08)
Matokeo ya uchanganuzi¶
Vibration modes na natural frequencies zimeonyeshwa hapa chini.
EX06 Turbine blade¶
 |  |
| (a) Mode 1 (1170 kHz) | (b) Mode 2(3250kHz) |
 |  |
| (c) Mode 3(4130kHz) | (d) Mode 4(4140kHz) |
 | |
| (e) Mode 5(8210kHz) |
Mchoro 9.3.3 Vibration modes za turbine blade EX06
EX07 Turbine rotor¶
 |  |
| (a) Mode 1(1067Hz) | (b) Mode 2(1072Hz) |
 |  |
| (c) Mode 3(1072Hz) | (d) Mode 4(1093Hz) |
 | |
| (e) Mode 5(1093Hz) | |
Mchoro 9.3.4 Vibration modes za turbine rotor EX07
EX08 Spring¶
| Mode 1 (445Hz) | Mode 2 (446Hz) | Mode 3 (908Hz) |
 |  |  |
| Mode 4 (985Hz) | Mode 5 (1819Hz) | |
 |  |
| FrontISTR | NASTRAN | |
|---|---|---|
| 1 | 445 Hz | 445 Hz |
| 2 | 446 Hz | 446 Hz |
| 3 | 908 Hz | 908 Hz |
| 4 | 985 Hz | 986 Hz |
| 5 | 1810 Hz | 1810 Hz |
Mchoro 9.3.5 Vibration modes za spring EX08
EX09 Cylindrical shell¶
(a) Mode 1, 2 (109 Hz)
(b) Mode 3,4(570Hz)
(c) Mode 5(615Hz)
Mchoro 9.3.6 Vibration modes za cylindrical shell EX09
EX10A Wine glass¶
 |  |  |
| (a) Mode 1(101Hz) | (b) Mode 2(102Hz) | (c) Mode 3(354Hz) |
 |  | |
| (d) Mode 4(1335Hz) | (e) Mode 5(1336Hz) |
Mchoro 9.3.7 Vibration modes za wine glass EX10A