郝璐静,原帅超,王建峰,等.激光增材制造无人机框梁结构拓扑优化设计及刚度分析[J].精密成形工程,2024,16(5):30-38.
HAO Lujing,YUAN Shuaichao,WANG Jianfeng,et al.Topology Optimization Design and Stiffness Analysis of Laser Additive Manufacturing UAV Frame Beams[J].Journal of Netshape Forming Engineering,2024,16(5):30-38. |
| 激光增材制造无人机框梁结构拓扑优化设计及刚度分析 |
| Topology Optimization Design and Stiffness Analysis of Laser Additive Manufacturing UAV Frame Beams |
| 投稿时间：2024-01-29 |
| DOI：10.3969/j.issn.1674-6457.2024.05.004 |
| 中文关键词: 激光增材制造 激光选区熔化 静力学分析 有限元模拟 无人机 |
| 英文关键词: laser additive manufacturing laser selective melting static analysis finite element simulation unmanned aerial vehicle |
| 基金项目:国家重点研发计划(2022YFB4602301) |
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| 中文摘要: |
| 目的 以选区激光熔化成形(SLM)无人机接头框梁结构为研究对象，研究不同工况条件下零件的变形分布情况，对原零件进行拓扑结构优化，并对优化后的零件进行二次静力学验证。方法 以AlSi10Mg铝合金粉末为原材料，利用Ansys Workbench软件的Mechanical模块对SLM成形接头零件4种工况下的静力学刚度行为进行有限元仿真。采用变密度法进行拓扑优化，以刚度最大化为目标、保留质量40%为响应约束进行结构优化，根据拓扑优化密度云图设计孔洞位置及尺寸，对模型进行重构，并在Ansys Workbench软件中进行二次静力学刚度仿真。结果 在4种工况条件下，接头零件弯曲时最大位移位置在上耳片边缘，除工况A外，其余工况均呈现沿z轴正向变形的趋势。在工况B下，总变形最大为0.289 mm，优化后为0.626 mm。优化后的零件使上、下耳片变形程度差异显著减小，最大变形差由0.128 mm减至0 mm。结论 不同位置接头零件的变形演变规律不同，几乎不存在扭转变形，主要是框梁结构的竖直弯曲变形，经拓扑结构优化后零件变形总体趋势并未改变，但整体结构的稳定性和一致性得到了显著提高。 |
| 英文摘要: |
| With the selected laser melting (SLM) unmanned aerial vehicle joint frame beam structure as the research object, the work aims to study the deformation distribution of parts under different working conditions, optimize the topology structure of the original parts and conduct secondary static verification for the optimized parts. With AlSi10Mg aluminum alloy powder as raw material, finite element simulation was conducted on the static stiffness behavior of SLM formed joint parts under four working conditions using the Mechanical module of Ansys Workbench software. The variable density method was used for topology optimization, with stiffness maximization as the objective and mass 40% as the response constraint for structural optimization. Based on the density pattern of topology optimization, hole positions and sizes were designed, the model was reconstructed, and secondary static stiffness simulation was conducted in Ansys Workbench software. Under four working conditions, the maximum displacement position of the joint part during bending was at the edge of the upper ear piece. Except for working condition A, all other working conditions showed a deformation trend along the positive z-axis. The maximum total deformation under working condition B was 0.289 mm, and after optimization, it was 0.626 mm. The difference in deformation between the upper and lower ear pieces of optimized parts was significantly reduced, with the maximum deformation difference reduced from 0.128 mm to 0 mm. The deformation evolution law of the joint parts varies at different positions, with almost no torsional deformation. The main deformation is the vertical bending deformation of the frame beam structure. After optimizing the topology structure, the overall trend of part deformation is not changed, but the stability and consistency of the overall structure are significantly improved. |
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