摘要
为克服风洞试验存在周期长、成本较高、设备复杂等不足,采用数值模拟提取三分力系数方法对某型装配式钢桁架桥梁典型断面三分力系数进行分析。采用计算流体力学(computational fluid dynamics,CFD)方法,对某型装配式钢桁架桥的三分力系数进行数值模拟。在对数值仿真结果与风洞试验结果对比分析的基础上,对桥梁的3种典型断面三分力系数进行分析,并给出3种典型断面的压力和速度分布图。结果表明:该方法与风洞实验值吻合较好,具有较好的可行性与可靠性,能为该桥的抗风性能分析提供直接的数据支持,并为桥梁结构优化提供参考。
To overcome the long wind tunnel test cycle, the higher costs, complex equipment brought by wind tunnel test, we used numerical simulation method to analyze tri-component force coefficient of a certain fabricated steel truss bridge. By use the computational fluid dynamics method, the tri-component force coefficient of a certain fabricated steel truss bridge was simulated. Based on the comparison between the numerical simulation results and wind tunnel test results, the tri-component force coefficient of 3 typical cross-sections of the bridge was analyzed. The pressure and velocity distribution was obtained. The results show that this method agrees well with the wind tunnel test results and has good feasibility and reliability. It not only provides a direct data support for the analysis of the bridge wind resistance, but also provides a reference for the optimization of the bridge structure.
出处
《兵工自动化》
2014年第4期88-91,共4页
Ordnance Industry Automation
关键词
装配式钢桁架桥
断面
三分力系数
CFD
数值仿真
fabricated steel truss bridge
cross-section
tri-component force coefficient
CFD
numerical simulation
