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浙江大学学报(工学版)
JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE)
Chemical Engineering and Biochemical Engineering     
Influence of pre-joining scheme on panel dynamic characteristic
QU Wei wei, LU Xian gang, YANG Di
Key Laboratory of Advanced Manufacturing Technology of Zhejiang Province, College of Mechanical Engineering, Zhejiang University, Hangzhou,310027, China
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Abstract  

The stiffness evaluation index for the dynamic performance of the pre-assembled panel was proposed aiming at the influence of the pre-joining on panel dynamic characteristic. The pre-joined structure was equivalent to a multiple degrees of freedom spring-mass system. In order to determine the pre-joining schemes, taking the maximum stiffness index as the optimization goal, a pre-joining scheme optimization model was presented and solved by the genetic algorithm. Subsequently, a simulation model of a skin-stringer panel with different pre-joining schemes and their corresponding stiffness information were constructed|the low natural frequencies were analyzed to verify the rationality of the proposed index. An experiment of panel dynamic characteristic was designedto compare the simulation frequencies obtained from different pre-joining schemes,which indicated the effectiveness of the simulation model of panel. The simulation and experiment prove the validity of the stiffness index, which lay a foundation for further study on the effect of pre-joining schemes on panel machining properties.

Published: 06 March 2017
CLC:  TH 16  
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QU Wei wei, LU Xian gang, YANG Di. Influence of pre-joining scheme on panel dynamic characteristic. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2017, 51(2): 336-343.


预连接工艺对壁板动态特性的影响分析

针对预连接对壁板动态性能影响的问题,提出描述壁板预装配后动态性能的刚度评价指标.为了确定预连接分布，将预连接结构等效为多自由度的弹簧质量系统,建立壁板预连接分布优化模型并提取相应刚度信息,以刚度指标最大为优化目标,应用遗传算法进行求解计算.构建蒙皮长桁的壁板仿真模型,将不同预连接分布映射至壁板仿真模型上,利用低阶固有频率的变化验证以刚度为指标的优化方法的正确性.设计壁板动态特性测试实验,与不同预连接分布下提取的仿真频率进行比较,证明了壁板仿真模型的有效性.通过仿真与实验,表明刚度指标的有效性,为进一步研究预连接分布对壁板加工性能影响研究奠定基础.

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