复杂曲面的流体-结构网格节点力传递方法

鲜章林; 程辉

doi:10.21656/1000-0887.450097

复杂曲面的流体-结构网格节点力传递方法

doi: 10.21656/1000-0887.450097

鲜章林^,,
程辉

中国飞行试验研究院，西安 710089

详细信息

作者简介:
程辉(1994—)，男，工程师，硕士(E-mail: 1119535951@qq.com)

通讯作者:
鲜章林(1991—)，男，高级工程师，硕士(通讯作者. E-mail: 453418355@qq.com)

中图分类号: O302
计量
- 文章访问数: 42
- HTML全文浏览量: 11
- PDF下载量: 9
- 被引次数: 0
出版历程
- 收稿日期: 2024-04-15
- 修回日期: 2025-02-23
- 刊出日期: 2025-06-01

A Nodal Force Transfer Method Between Fluid-Structure Grids for Complex Surfaces

XIAN Zhanglin^,,
CHENG Hui

Chinese Flight Test Establishment, Xi'an 710089, P.R.China

摘要

摘要: 在流体-结构联合分析过程中，获得流体网格计算结果后需要通过合适的数据传递方法将节点载荷映射到结构网格上. 为了满足复杂曲面上节点力的传递精度要求，提出基于临界二面角判据和最大/最小影响半径的搜索算法，完成曲面上插值区域的判定. 采用基于最小势能原理的三维节点力插值方法完成节点力在两套计算网格之间的数据传递，并通过数值算例验证了传递前后载荷分布、合力、合力矩的一致性.
- 节点力插值 /
- 最小势能原理 /
- 临界二面角判据 /
- 最大/最小影响半径
Abstract: In the process of fluid-structure coupling analysis, it is necessary to use appropriate data transfer method to map the node load onto the structural grid. To meet the accuracy requirements of nodal force transfer on complex surfaces, a search algorithm based on the critical dihedral angle criterion and the maximum/minimum influence radius was proposed to determine the interpolation area on the surface. A 3D node force interpolation method based on the principle of minimum potential energy was used to transfer node force data between 2 sets of calculation grids, the consistency of load distributions, resultant forces, and resultant moments after transfer was verified through numerical examples.
- nodal force interpolation /
- the principle of minimum potential energy /
- critical dihedral angle criterion /
- maximum/minimum influence radius

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图 1 结构有限元单元法向量确定

Figure 1. Determination of normal vectors for structural finite elements

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图 2 临界二面角判据应用示意图

Figure 2. The diagram of the critical dihedral angle criterion

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图 3 利用最大影响半径R_max剔除无效气动网格节点

Figure 3. Maximum influence radius R_max used to eliminate the invalid aero nodes

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图 4 由R_min和α_crt完成最终插值区域确定

Figure 4. The final interpolation area determined by R_min and α_crt

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图 5 悬臂梁系统

Figure 5. The cantilever beam system

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图 6 插值前后F_X分布对比

Figure 6. Comparison before and after interpolation on F_X

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表 1 本文插值算法与商用软件插值精度比较

Table 1. Comparison of interpolation accuracies between the interpolation algorithm in this paper and the commercial software

interpolation algorithm		F_X/N	F_Y/N	F_Z/N	M_X/(N·mm)	M_Y/(N·mm)	M_Z/(N·mm)
	CFD result	1 612.3	23.94	-369.46	2 319.2	3 633 438.5	156 605.9
method in this paper	after interpolation	1 612.3	23.94	-369.46	2 319.2	3 633 438.5	156 605.9
method in this paper	error/%	-2.78E-8	3.67E-8	1.38E-8	3.21E-6	1.76E-8	3.79E-6
inverse-distance (TECPLOT)	after interpolation	1 643.4	20.64	-380.68	2 488.75	4 145 487	136 509.9
inverse-distance (TECPLOT)	error/%	1.93	-13.78	3.04	7.31	14.09	-12.83
Kriging (HYPERMESH)	after interpolation	1 688.2	25.48	-358.54	2 617.32	3 145 316	185 868
Kriging (HYPERMESH)	error/%	4.71	6.43	-2.96	12.85	-13.43	18.69

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