得出

Get the amplitude frequency characteristics of impulse response and aeroelastic coupling response by discrete Fourier transform of time domain response, then get the structural damping of blade and tower and the aeroelastic damping of blade based on half-power bandwidth method.

通过对时域响应进行离散傅里叶变换，得出脉冲响应与气弹耦合响应的幅频特性，然后基于半功率带宽法得出叶片与塔架的结构阻尼及叶片的气弹阻尼。

Research results: The analysis process of frame bridge with skew angle has been given by use of MIDAS. We obtained the outcomes from two models and the difference between results with 2D rigid frame and 3D space model of thick plate element.

研究结果：给出了用MIDAS分析斜交框架桥的详细分析过程，得出斜交框架桥三维空间模型和二维平面模型分析的结果，并得出2种模型计算结果的差别。

In the end finish the machining of bubble breaker, and take some ground tests, make preliminary conclusion: the design can meet function of throwing in and pulling. Next, take some downhole test and get the test data.

最后完成了投捞式破碎器的加工，并且做了破碎器的地面试验。得出了初步的结论：设计基本实现了投放和打捞的功能，下一步进行井下试验得出试验数据。