Full
Outline
To meet the lightweight design requirements of nuclear power pneumatic actuator brackets，a topology optimization study was conducted on the bracket using HyperWorks software.An optimization method based on the variable density method was adopted，with the objective function of minimizing structural weight and the design variable being the material density of elements within the design domain.The optimal material distribution was solved under displacement constraints （±0.29 mm） and stress constraints （≤248 MPa）.Based on the solution results，the bracket model was reconstructed，and static analysis validation and modal validation were performed.The results show that after topology optimization，the bracket weight reduction rate reached 24.22%，with the main weight reduction area being the side walls of the bracket.The maximum displacements of the bracket in the X，Y，and Z directions are all less than ±0.29 mm，and the stresses were reduced by 46.96%，53.58%，and 58.29%，respectively，compared with those before optimization.The resonance frequencies in the X，Y，and Z directions （123.3，88.3，139.28 Hz） were all much higher than the frequency requirement for nuclear power operating conditions （33 Hz），indicating that the bracket has good vibration resistance.This lightweight design method effectively improves the design efficiency of the bracket and reduces its manufacturing cost，providing a reference for the optimization of pneumatic actuator brackets with similar structures.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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