| 1. | Advances in damping analysis and design of fiber reinforced composite material structures
纤维增强复合材料结构阻尼研究进展 |
| 2. | ( 3 ) . linear quadratic regulation method is used to design the optimal feed back controller for the composite material structures with the piezoceramics embedded
( 3 ) .对压电复合智能材料结构设计了线性二次型最优控制器。 |
| 3. | Analysis and compution proves that those dsps are precise to identify the damage of structures . so these dsps could be applied in shm for composite materials structures
分析计算的结果表明，几种标识量都有较好的识别精度，能较可靠地应用用于复合材料结构的损伤识别和健康监控。 |
| 4. | This paper starts with the dynamic characteristics of structures , seeks the damage sign parameters ( dsp ) of composite materials structures , which have essential relations with the damage / healthy status
本文从复合材料结构的动力学特性入手，找出能较方便地反映结构损伤失效的特征标识量。 |
| 5. | The main research works done and conclusions extracted are listed as follows . ( 1 ) . based on the piezoelectric equation , the strain and stress distribution are analyzed for the composite material structures with piezoelectric materials embedded inside
从压电材料的压电方程出发，针对埋入式压电片，分析埋入式压电片在和结构一起发生变形时基体结构材料和压电材料的应力应变的分布规律和关系。 |
| 6. | The conclusions obtained as follows : firstly , the structure ' s free frequency is decreased by the reduction of the mechanical property of the material with the increasing temperature ; secondly the thermal stress produced by the temperature gradient may decrease or enlarge the structures natural frequency ; thirdly , the variety of natural frequency of the alloy structures effected by the heat effect apparently higher than that of the composite material structures
最后，采用ansys程序分析了合金材料、复合材料的板、弹体结构的热振动特性。在不同的热载条件下，取得以下结论：升温导致的材料机械性能下降都会降低结构固有频率，而温度梯度产生的热应力可能降低也可能提高结构的固有频率；金属材料结构的固有频率受温度的影响要比复合材料结构的固有频率受温度的影响要明显。 |
| 7. | This article gives the subsistent ability and the analysis result of intensity after repair in the open field airplane composite material structure by research the intensity , rigid and repair problem under a axis compress loads on a typical three stiffened composite laminate which has a penetrability crack ( a scatter damage ) by a shrapnel
本文通过飞机典型复合材料三加筋层压板结构在被弹片划开一穿透性切口(离散源损伤)后，在轴向压缩载荷作用下所产生的强度、刚度以及修理问题展开了技术研究及探讨，给出军机复合材料加筋板在弹击后生存力以及外场修理后强度恢复分析结果。 |
| 8. | Two kinds of modeling methods , finite element method ( fem ) and experimental identification methods based on modal analysis theory , are applied to get the models of the dynamic systems . using the finite element model for the composite material structures with piezoceramics embedded and the technique to reduce the number of degrees - of - freedom of fem model , a reduced and appropriate model for online control is also introduced
通过对埋有压电作动器和压电传感器的智能复合材料结构进行有限单元分析，建立起了结构振动的有限单元模型，并介绍了对有限摘要单元模型进行模型降阶的方法，使其适合于对结构的振动进行控制。 |
| 9. | This dissertation deals with the active vibration control strategy using the embedded piezoceramics as both actuators and sensors . with several ceramics embedded into the composite material structures during the manufacturing process without knowing the structural behavior in advance , this dissertation makes use of a self identification procedure to get the models of the system . apparently , the on - line self identification method enable people to update the models of system
另外本文利用埋入复合材料结构中的压电传感器和驱动器对其进行模型识别而得出结构的动力学模型，再将该模型用于控制器的设计，这样做的好处是如果结构本身或者约束、环境等发生变化后，可以很方便地对结构的模型重新进行在线识别，及时更新控制参数，避免控制失效，而且不需要事先知道结构的其它属性。 |
