Fig 1.
3D solid model of vehicle body.
Table 1.
Frame material parameters.
Fig 2.
(a) Overall meshing, (b) Local meshing of the front axle, (c) Local meshing of the rear axle.
Fig 3.
Optimization of the design process.
Fig 4.
Shape of longitudinal beam section.
Table 2.
Value range of design variables.
Table 3.
Calculation results of optimized design points.
Fig 5.
Response surface graph of lightweight model.
(a) h-b displacement response surface (b) h-t displacement response surface (c) b-t displacement response surface (d) h-b stress response surface (e) h-t stress response surface (f) b-t stress response surface (g) h-b weight response surface (h) h-t weight response surface (i) b-t weight response surface.
Table 4.
Candidate optimal design points.
Table 5.
Parameter changes before and after optimization.
Table 6.
Setting of boundary conditions for each working condition.
Fig 6.
Schematic diagram of the monitoring path.
Fig 7.
Displacement comparison curves of main components under bending condition.
(a) Contrast curve of axle displacement (b) Contrast curve of crossbeam displacement (c) Contrast curve of longitudinal beam displacement.
Fig 8.
Stress comparison curves of main components under bending conditions.
(a) Contrast curve of axle stress (b) Contrast curve of crossbeam stress (c) Comparison curve of longitudinal beam stress.
Fig 9.
Displacement comparison curves of main components under torsion condition.
(a) Contrast curve of axle displacement (b) Contrast curve of crossbeam displacement (c) Contrast curve of longitudinal beam displacement.
Fig 10.
Stress comparison curves of main components under torsion condition.
(a) Contrast curve of axle stress (b) Contrast curve of crossbeam stress (c) Comparison curve of longitudinal beam stress.
Fig 11.
Displacement comparison curves of main components under the turning condition.
(a) Contrast curve of axle displacement (b) Contrast curve of crossbeam displacement (c) Contrast curve of longitudinal beam displacement.
Fig 12.
Stress comparison curves of main components under the turning condition.
(a) Contrast curve of axle stress (b) Contrast curve of crossbeam stress (c) Comparison curve of longitudinal beam stress.
Fig 13.
Displacement comparison curves of main components under braking condition.
(a) Contrast curve of axle displacement (b) Contrast curve of crossbeam displacement (c) Contrast curve of longitudinal beam displacement.
Fig 14.
Stress comparison curves of main components under braking condition.
(a) Contrast curve of axle stress (b) Contrast curve of crossbeam stress (c) Comparison curve of longitudinal beam stress.