| { |
| "problem_id": "auto_problem_098", |
| "description": "Truss optimization problem (ground structure variant 98)", |
| "topology": { |
| "joints": [ |
| { |
| "id": 0, |
| "position": [ |
| 0.0, |
| 0.0, |
| 0.0 |
| ], |
| "support": "pinned" |
| }, |
| { |
| "id": 1, |
| "position": [ |
| 3.8002021030678743, |
| 0.0, |
| 0.0 |
| ], |
| "support": null |
| }, |
| { |
| "id": 2, |
| "position": [ |
| 7.600404206135749, |
| 0.0, |
| 0.0 |
| ], |
| "support": "roller_y" |
| }, |
| { |
| "id": 3, |
| "position": [ |
| 0.0, |
| 1.7582927676193367, |
| 0.0 |
| ], |
| "support": null |
| }, |
| { |
| "id": 4, |
| "position": [ |
| 3.8002021030678743, |
| 1.7582927676193367, |
| 0.0 |
| ], |
| "support": null |
| }, |
| { |
| "id": 5, |
| "position": [ |
| 7.600404206135749, |
| 1.7582927676193367, |
| 0.0 |
| ], |
| "support": null |
| } |
| ], |
| "members": [ |
| { |
| "joints": [ |
| 0, |
| 1 |
| ], |
| "material": "A36_Steel", |
| "shape": { |
| "type": "Pipe", |
| "r": 0.034447497424959846, |
| "t": 0.004175049216103568 |
| } |
| }, |
| { |
| "joints": [ |
| 1, |
| 2 |
| ], |
| "material": "A36_Steel", |
| "shape": { |
| "type": "Pipe", |
| "r": 0.034994451662572416, |
| "t": 0.0043759506165126465 |
| } |
| }, |
| { |
| "joints": [ |
| 3, |
| 4 |
| ], |
| "material": "A36_Steel", |
| "shape": { |
| "type": "Pipe", |
| "r": 0.030073139616086386, |
| "t": 0.00409616055934692 |
| } |
| }, |
| { |
| "joints": [ |
| 4, |
| 5 |
| ], |
| "material": "A36_Steel", |
| "shape": { |
| "type": "Pipe", |
| "r": 0.02917956191668466, |
| "t": 0.003874016846885901 |
| } |
| }, |
| { |
| "joints": [ |
| 0, |
| 3 |
| ], |
| "material": "A36_Steel", |
| "shape": { |
| "type": "Pipe", |
| "r": 0.023063350030374834, |
| "t": 0.0038438916717291383 |
| } |
| }, |
| { |
| "joints": [ |
| 1, |
| 4 |
| ], |
| "material": "A36_Steel", |
| "shape": { |
| "type": "Pipe", |
| "r": 0.019837772854090496, |
| "t": 0.0033062954756817495 |
| } |
| }, |
| { |
| "joints": [ |
| 2, |
| 5 |
| ], |
| "material": "A36_Steel", |
| "shape": { |
| "type": "Pipe", |
| "r": 0.027427818057311353, |
| "t": 0.004571303009551891 |
| } |
| }, |
| { |
| "joints": [ |
| 0, |
| 4 |
| ], |
| "material": "A36_Steel", |
| "shape": { |
| "type": "Pipe", |
| "r": 0.036999959359686106, |
| "t": 0.006166659893281017 |
| } |
| }, |
| { |
| "joints": [ |
| 1, |
| 3 |
| ], |
| "material": "A36_Steel", |
| "shape": { |
| "type": "Pipe", |
| "r": 0.032295534095060995, |
| "t": 0.005382589015843499 |
| } |
| }, |
| { |
| "joints": [ |
| 1, |
| 5 |
| ], |
| "material": "A36_Steel", |
| "shape": { |
| "type": "Pipe", |
| "r": 0.03133453143166578, |
| "t": 0.005222421905277629 |
| } |
| } |
| ] |
| }, |
| "loading": [ |
| { |
| "joint": 5, |
| "force": [ |
| 0.0, |
| -78734.46768393353, |
| 0.0 |
| ] |
| }, |
| { |
| "joint": 3, |
| "force": [ |
| 0.0, |
| -31095.417158785745, |
| 0.0 |
| ] |
| }, |
| { |
| "joint": 4, |
| "force": [ |
| 0.0, |
| -70327.2061522573, |
| 0.0 |
| ] |
| } |
| ], |
| "goals": { |
| "minimum_fos_buckling": 1.5, |
| "minimum_fos_yielding": 1.5, |
| "maximum_mass": 322.54758820334996 |
| }, |
| "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": 293.2250801848636, |
| "generation_method": "ground_structure_lp", |
| "degradation_steps": 5 |
| } |
| } |