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提出对三个相邻结构间连接阻尼装置进行减震控制,推导了其单自由度简化模型随机响应计算公式,同时也给出了多自由度模型的阻尼、刚度等矩阵的构造方法并利用复模态法推导了其随机响应公式;最后对单自由度简化模型的三相邻结构各组合情况的减震效果分别进行了分析,并详细研究一般情况下的多自由度模型的三相邻结构减震效果。经仿真分析表明,三相邻结构控制后与两相邻结构控制所得结果基本相同;在两相邻结构对称而控制无效的情况下,三相邻结构仍可得到较好的控制效果;三相邻结构具有良好的鲁棒性,且对高阶响应峰值抑制明显。
In this paper, the damping control of the damping device connected with three adjacent structures is proposed. The formula for calculating the random response of the simplified model with single degree of freedom is deduced. At the same time, the construction method of damping and stiffness matrix of multi-degree of freedom model Modal method to derive its random response formula. Finally, the damping effects of the three adjacent structures in a single-degree-of-freedom simplified model are respectively analyzed, and the three adjacent structures of the multi-degree-of-freedom model in general are studied in detail Shock absorption effect. The simulation results show that the control results of the three adjacent structures are basically the same as that of the two adjacent structures. When the two adjacent structures are symmetrical and the control is ineffective, the three adjacent structures can still get good control effect. The three-phase The ortho-structure has good robustness, and suppresses the peak of high-order response obviously.