| { |
| "problem_id": "auto_problem_097", |
| "description": "Truss optimization problem (ground structure variant 97)", |
| "topology": { |
| "joints": [ |
| { |
| "id": 0, |
| "position": [ |
| 0.0, |
| 0.0, |
| 0.0 |
| ], |
| "support": "pinned" |
| }, |
| { |
| "id": 1, |
| "position": [ |
| 3.3789623388401564, |
| 0.0, |
| 0.0 |
| ], |
| "support": null |
| }, |
| { |
| "id": 2, |
| "position": [ |
| 6.757924677680313, |
| 0.0, |
| 0.0 |
| ], |
| "support": "roller_y" |
| }, |
| { |
| "id": 3, |
| "position": [ |
| 0.0, |
| 3.4454795189000462, |
| 0.0 |
| ], |
| "support": null |
| }, |
| { |
| "id": 4, |
| "position": [ |
| 3.3789623388401564, |
| 3.4454795189000462, |
| 0.0 |
| ], |
| "support": null |
| }, |
| { |
| "id": 5, |
| "position": [ |
| 6.757924677680313, |
| 3.4454795189000462, |
| 0.0 |
| ], |
| "support": null |
| } |
| ], |
| "members": [ |
| { |
| "joints": [ |
| 0, |
| 1 |
| ], |
| "material": "A36_Steel", |
| "shape": { |
| "type": "Pipe", |
| "r": 0.02654286440936937, |
| "t": 0.003474074396624436 |
| } |
| }, |
| { |
| "joints": [ |
| 1, |
| 2 |
| ], |
| "material": "A36_Steel", |
| "shape": { |
| "type": "Pipe", |
| "r": 0.0262499793687347, |
| "t": 0.0034357400102096795 |
| } |
| }, |
| { |
| "joints": [ |
| 3, |
| 4 |
| ], |
| "material": "A36_Steel", |
| "shape": { |
| "type": "Pipe", |
| "r": 0.011816058306195958, |
| "t": 0.0009555671362004799 |
| } |
| }, |
| { |
| "joints": [ |
| 4, |
| 5 |
| ], |
| "material": "A36_Steel", |
| "shape": { |
| "type": "Pipe", |
| "r": 0.014255227342764892, |
| "t": 0.0018658016544770015 |
| } |
| }, |
| { |
| "joints": [ |
| 0, |
| 3 |
| ], |
| "material": "A36_Steel", |
| "shape": { |
| "type": "Pipe", |
| "r": 0.03673561643008797, |
| "t": 0.0048081571949308965 |
| } |
| }, |
| { |
| "joints": [ |
| 2, |
| 5 |
| ], |
| "material": "A36_Steel", |
| "shape": { |
| "type": "Pipe", |
| "r": 0.034238069880144086, |
| "t": 0.004481264724332473 |
| } |
| }, |
| { |
| "joints": [ |
| 0, |
| 4 |
| ], |
| "material": "A36_Steel", |
| "shape": { |
| "type": "Pipe", |
| "r": 0.03462937348488467, |
| "t": 0.004532480667478998 |
| } |
| }, |
| { |
| "joints": [ |
| 1, |
| 3 |
| ], |
| "material": "A36_Steel", |
| "shape": { |
| "type": "Pipe", |
| "r": 0.015389569997205154, |
| "t": 0.0020142705880484228 |
| } |
| }, |
| { |
| "joints": [ |
| 1, |
| 5 |
| ], |
| "material": "A36_Steel", |
| "shape": { |
| "type": "Pipe", |
| "r": 0.018576217027663874, |
| "t": 0.0024313562758948378 |
| } |
| } |
| ] |
| }, |
| "loading": [ |
| { |
| "joint": 4, |
| "force": [ |
| 0.0, |
| -45701.589157300215, |
| 0.0 |
| ] |
| }, |
| { |
| "joint": 3, |
| "force": [ |
| 0.0, |
| -76984.96000592099, |
| 0.0 |
| ] |
| }, |
| { |
| "joint": 5, |
| "force": [ |
| 0.0, |
| -56759.47815612433, |
| 0.0 |
| ] |
| } |
| ], |
| "goals": { |
| "minimum_fos_buckling": 1.5, |
| "minimum_fos_yielding": 1.5, |
| "maximum_mass": 245.5845540544499 |
| }, |
| "optimization": { |
| "shape": "Pipe", |
| "shape_params": { |
| "r": { |
| "min": 0.005, |
| "max": 0.15, |
| "initial": 0.03 |
| }, |
| "t": { |
| "min": 0.001, |
| "max": 0.02, |
| "initial": 0.005 |
| } |
| } |
| }, |
| "_metadata": { |
| "optimal_mass": 223.25868550404536, |
| "generation_method": "ground_structure_lp", |
| "degradation_steps": 5 |
| } |
| } |
