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在采用子结构自由界面及固定界面的两类模态综合理论的基础上进行了以解决复杂结构全尺寸振动试验为目的的试验模态综合研究。通过子结构的试验过程，探讨了它的模态测试技术、试验数据分析处理方法，包括最佳测点间距的计算、从多测点中提取所需数据的回归法、获取振型转角数据的改进技术等。它较之以往进行的自由界面试验综合结果有了明显的稳定和进步。
Based on the two types of modal synthesis theory of the free-form and free-form interfaces of the substructure, a comprehensive experimental modal study was conducted to solve the full-scale vibration test of complex structures. Through the sub-structure test process, its modal testing technology, experimental data analysis and processing methods, including the calculation of the best measuring point spacing, the regression method of extracting the required data from multiple measuring points, Improve technology and so on. It has obvious stability and progress compared with the past results of the free interface test.