Initial disturbance is more sensitive to the higher order model.

高阶模型对初始扰动更加敏感。

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Then the high order model was reduced by the modal aggregation method.

采用模态集结法对其高阶模型进行降阶。

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Then the high order model was reduced by the modal aggregation method.

采用模态集结法对其高阶模型进行降阶。

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