| 阎桂荣,董龙雷,宋利强.一种提高飞行器结构天地力学环境地面试验有效性的方法及其应用[J].装备环境工程,2016,13(5):10-16. 阎桂荣,董龙雷,宋利强.A Method and its Application for Improving the Validity of Ground Testing of Mechanical Environment’s effects on Aircraft Structure[J].Equipment Environmental Engineering,2016,13(5):10-16. |
| 一种提高飞行器结构天地力学环境地面试验有效性的方法及其应用 |
| A Method and its Application for Improving the Validity of Ground Testing of Mechanical Environment’s effects on Aircraft Structure |
| 投稿时间：2016-08-12 修订日期：2016-09-09 |
| DOI：10.7643/ issn.1672-9242.2016.05.002 |
| 中文关键词: 振动试验 映射关系模型 有限元分析 试验有效性 |
| 英文关键词:vibration test mapping relation model finite element analysis test validity |
| 基金项目:《振动离心复合环境中自适逆控制方法研究》”(10276032) |
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| 中文摘要: |
| 目的研究提高飞行器结构地面试验有效性的途径。方法计算同一被试件结构在飞行状态和地面试验状态下的有限元模型,测量地面试验状态下的模态以验证有限元模型的正确性；计算各特征点(也可以是遥测点)在天地状态下的响应,用机器学习法获取各特征点的映射关系模型；基于该模型由飞行点响应(或遥测数据)确定出地面试验件对应点的响应,并用载荷反求法得到它们的等效载荷;最终确定施加在试验系统上的载荷。结论利用天地数值计算-地面试验验证联合法,无需在地面试验状态下刻意模拟飞行状态的边界条件,确定出所需要施加的载荷,从而提高了飞行器地面试验的有效性。 |
| 英文摘要: |
| Objective To study the way of improving the validity of the aircraft structure ground test. Methods The finite element models of the specimen structure in flight and ground test condition are calculated, then the test model of the specimen structure in ground testing is measured to verify the validity of the finite element model. The vibration response of feature points in flight and ground testing are calculated; the mapping relation model of the feature points is calculated by machine learning methods, then the responses of each point in ground testing is determined by the flight telemetry data. Finally, the load imposed on the test system is determined. Results With a slender body structure as an example,the maximum relative error between the finite element model and measured model of the test system is 6.76%. Using measurring points during ground testing and the mapping relation model, the vibration response of the feature points in flight state can be predicted; the vibration response of the corresponding ground testing points can be determined and the equivalent load on these ponints can be solved using the method of load reverse. Thus, the last load to be applied to the test system can be determined.Conclusion By the unified method of the flight-ground numerical calculation and the ground testing, the load to be applied in the ground test can be determined without deliberately simulating the boundary conditions in flight state, which improves the validity of the aircraft ground testing. |
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