Page 172 - 《爆炸与冲击》2026年第3期

第 46 卷 樊元帅，等： 压弯与撞击耦合作用后圆端形钢管混凝土柱的剩余力学性能 第 7 期

Constrained on the end plate
Constrained on the end plate
u x =u y =u z =0, Hammer u x =u y =u z =0, r x =r y =r z =0 Constrained on the end plate Constrained on the end plate
r x =r y =r z =0 (u x =u z =0, r x =r y =r z =0) u x=u y=u z=0, r x=r y=0 u y=u z=0, r x=r y=0

Pre-axial load Axial load

Roller
(a) Impact model (b) Residual bearing capacity model

图 8 有限元模型
Fig. 8 Finite element models
3.2 模型验证

图 9～10 分别给出了撞击力、挠度时程曲线和破坏模态的有限元模拟结果与实验结果 [26] 的对比，
以进一步明确该模型的准确性。图 11 给出了撞击后残余挠度 Δ g,res [26] 和剩余承载力 N 的试验验值与模
r
1 000 100 1 000 100 1 000 100

Impact force/kN 600 60 Deflection/mm Impact force/kN 600 60 Deflection/mm Impact force/kN 600 60 Deflection/mm
80
80
80
800
800
800
40
40
40
400
400
400
200
0
0
0
0 20 200 0 20 200 0 20
0 4.8 9.6 14.4 19.2 0 4.8 9.6 14.4 19.2 0 5.1 10.215.3 20.4
Time/ms Time/ms Time/ms
(a) Specimen L-0.1-0.5-7 (b) Specimen L-0.2-0.5-7 (c) SpecimenL-0.1-0.3-7
1 000 100 1 000 100
Impact force/kN 600 60 Deflection/mm Impact force/kN 600 60 Deflection/mm Exp. [26]
80
80
800
800
Impact force Deflection
400
40
400
40
FE
200
0 20 200 0 20
0
0
0 5.2 10.4 15.6 20.8 0 5.8 11.6 17.4 23.2
Time/ms Time/ms
(d) Specimen L-0.3-0.3-7 (e) Specimen L-0.3-0.5-7
图 9 撞击力和挠度时程曲线的模拟结果与实验结果 [26] 的对比
[26]
Fig. 9 Comparison of impact force- and deflection-time curves between numerical and experimental results

Local deformation Local deformation Local deformation
Experiment [26] , Experiment [26] , Experiment [26] ,
global deformation is 33.8 mm global deformation is 40.2 mm global deformation is 32.5 mm
Local deformation Local Local
deformation
deformation
Simulation, Simulation, Simulation,
global deformation is 36.9 mm global deformation is 44.5 mm global deformation is 35.3 mm
(a) Specimen L-0.1-0.5-7 (b) Specimen L-0.2-0.5-7 (c) Specimen L-0.1-0.3-7
图 10 试样破坏模态的有限元模拟结果和实验结果 [26] 的对比
Fig. 10 Comparison of failure modes of specimens between finite element simulation and experiment [26]

073901-7