载荷历程实时智能传感技术及其在结构瞬态波传播研究中的应用

项目名称： 载荷历程实时智能传感技术及其在结构瞬态波传播研究中的应用

项目编号： No.11272282

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 庄国志

作者单位： 浙江大学

项目金额： 78万元

中文摘要： 结构初期瞬态响应对结构动力问题具有重要影响，对柔性机器人的定位、航空器的着陆或航天器的对接、高层建筑的结构设计等问题，其动力特性必须通过波传播分析才得以完整描述。由于标准动态载荷本身的缺陷，载荷时间历程的测量困难，以及同步多维多点传感技术的限制，目前对初期瞬态响应的研究较少有实验上的严谨验证。有鉴于实验验证对解决科学问题的重要性，本项目将发展标准动态载荷（正弦、随机、冲击与阶跃）及相关载荷历程实时智能传感技术，建立Timoshenko悬臂梁、多跨连续梁与门型刚架的瞬态波传播分析方法，并给出一个可实现梁结构瞬态波传播理论与实验相一致的研究方案。本项目也将开发可测量多维多点的高动态灵敏度光纤光栅位移传感系统，解决目前多数激光传感系统的高成本、占体积、多维多点同步测量困难及测点表面粗糙度要求高等缺点，并探讨不同测点与维度下波的传播特性。本项目将为载荷历程反演、实验力学和波传播的发展与应用提供理论

中文关键词： 光纤光栅；载荷历程；声子晶体；缺陷态；

英文摘要： For structural dynamic problems where initial transient responses play important roles, such as position planning of flexible manipulators, landing of aircrafts or docking of spacecrafts, and structural design of tall buildings, wave propagation analysis is necessary for completely knowing the properties of the dynamic characteristics. Research considering wave propagation in structures with rigorous experimental validation is not much. The reasons include the drawbacks of the standard dynamic loadings, difficulties of knowing the time history of the loading, limitations of simultaneous multi-dimensions and multi-points dynamic measurements. Because the importance of experiments to scientific research，this project will establish four standard dynamic loadings, including harmonic loadings, random loadings, impulsive loadings, and step function loadings, and the related smart sensing techniques for the time history of the loadings. In order to provide related theories which can be verified by the experiments, this project will also establish wave propagation analysis methods for the cantilever beams, multi-span continuous beams, and portal frames. Since most of the existing laser-based measurement systems have drawbacks such as high cost, occupying space, difficult to perform multi-dimension measurement, and requi

英文关键词： fiber Bragg gratings；Impact history；phononic crystal；defect mode；