| 引用本文: | 唐宇航,梅志远,陈志坚.非均质系统中主导振动子系统的阻尼辨识法[J].哈尔滨工业大学学报,2017,49(11):130.DOI:10.11918/j.issn.0367-6234.201703015 |
| TANG Yuhang,MEI Zhiyuan,CHEN Zhijian.Dampingidentification method of dominant vibration subsystem in heterogeneous system[J].Journal of Harbin Institute of Technology,2017,49(11):130.DOI:10.11918/j.issn.0367-6234.201703015 |
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| 摘要: |
| 复合材料以其优越的性能在船舶制造领域应用愈加广泛，钢-复合材料非均质组合系统作为典型的工程结构形式，有着异于单一均质系统的动力学特性.由于实际结构一般较为复杂，试验测试时难以直接确定组合系统中各阶主要参与振动或噪声辐射的子系统组成.为了直观快速地获取复合结构主导参与振动的子系统，从非均质组合系统的主从振动模式和阻尼耗散机理分析入手，结合统计能量分析原理中关于损耗因子的分类描述，对组合系统振动时所表征的阻尼规律进行分析.计算并对比了钢-复合材料组合系统各阶模态内损耗因子，以及分析了其主导振动子系统的能量占比.结果表明：排除声辐射和边界损耗影响后，非均质组合系统的内损耗因子在数值上接近于其主导振动子系统的材料损耗因子，并介于各子系统材料损耗因子极值之间.完成了某典型组合系统的模态识别，验证了运用损耗因子组成规律辨识主导振动子系统的可行性，弥补了试验测试中对复杂非均质组合结构在模态识别方面的不足.
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| 关键词: 非均质 损耗因子 主导振动 复合材料 主从振动 组合系统 |
| DOI：10.11918/j.issn.0367-6234.201703015 |
| 分类号:TH212；TH213.3 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(51479205) |
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| Dampingidentification method of dominant vibration subsystem in heterogeneous system |
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TANG Yuhang,MEI Zhiyuan,CHEN Zhijian
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(Department of Naval Architecture Engineering, Naval University of Engineering, Wuhan 430033, China)
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| Abstract: |
| Composite materials with its superior performance are more widely used in the field of shipbuilding. As a typical engineering structure, steel-composite with heterogeneous property has the dynamic characteristics different from that of a single homogeneous system. As the actual structure is generally more complex, it is difficult to directly determine the composition of the subsystems involved in vibration or noise radiation in the composite structure. In order to obtained the subsystem that are involved in the vibration of the composite structure, based on the analysis of the master-slave vibration mode and damping dissipation mechanism of heterogeneous composite system, combining with statistical energy analysis principle on the loss factor classification description, the damping law of the composite system was analyzed. The loss factors and the energy proportion of the dominant vibration subsystem of steel-composite system were calculated and compared. The results show that after eliminating the effects of radiation loss and boundary loss, the internal loss factor of the heterogeneous composite system close to the material loss factor of its dominant vibration subsystem in magnitude, and between each subsystem of material loss factor value. The modal recognition of a typical combination system is completed, and the feasibility of using the loss factor composition rule to identify the dominant vibration subsystem is verified. The deficiency of complex non-homogeneous composite structure in modal recognition is made up.
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| Key words: heterogeneous loss factor dominant vibration composites master-slave vibration mode combination system |
