部分構造合成法による振動解析 : 第8報, 実験データを用いたモード合成法
1989 年 55 巻 510 号 p. 337-342
詳細
1989 年 55 巻 510 号 p. 337-342
The Experimental Modal Synthesis Method has many advantages : experimental data can be used easily, modeling errors can be avoided, dynamic characteristics can be acquired directly, less computer memory required, and less CPU time consumed. This paper proposes the modal analysis method of the structure with a general viscous damping property in free-free boundary conditions. It also proposes the Experimental Modal Synthesis Method using the former theory. A test model made by 2 bar components is applied to validate this method. Very good agreement is obtained in lower order natural frequencies. However, some differences appeared in higher orders, which are caused by transferred moments through the joints. The amount of transferred moments may be estimated by the inspection of the linearity of the modes of the connected nodes.
