张大英, 许启铿, 杨庆贺, 孙露馨. 筒承式群仓模型环境激励试验及动力参数识别[J]. 河南工业大学学报自然科学版, 2024, 45(4): 109-116. DOI: 10.16433/j.1673-2383.202401150001
    引用本文: 张大英, 许启铿, 杨庆贺, 孙露馨. 筒承式群仓模型环境激励试验及动力参数识别[J]. 河南工业大学学报自然科学版, 2024, 45(4): 109-116. DOI: 10.16433/j.1673-2383.202401150001
    ZHANG Daying, XU Qikeng, YANG Qinghe, SUN Luxin. Environmental excitation test and dynamic parameter identification of the group silo model with cylinder supporting structure[J]. Journal of Henan University of Technology(Natural Science Edition), 2024, 45(4): 109-116. DOI: 10.16433/j.1673-2383.202401150001
    Citation: ZHANG Daying, XU Qikeng, YANG Qinghe, SUN Luxin. Environmental excitation test and dynamic parameter identification of the group silo model with cylinder supporting structure[J]. Journal of Henan University of Technology(Natural Science Edition), 2024, 45(4): 109-116. DOI: 10.16433/j.1673-2383.202401150001

    筒承式群仓模型环境激励试验及动力参数识别

    Environmental excitation test and dynamic parameter identification of the group silo model with cylinder supporting structure

    • 摘要: 为获得群仓动力参数以进行更合理的抗震设计,以上海某粮食储备库的筒壁支承群仓为原型制作群仓模型进行环境激励试验。考虑群仓模型的对称性并结合模型的有限元模态分析结果,在筒仓振动响应较大的位置进行关键测点、一般测点和参考点的布置,测试获得各测点加速度响应。基于模态参数识别理论,引入变换矩阵,通过求解系统矩阵的特征值并经过反向变换来识别群仓模型前4阶动力参数。结果表明:将识别参数与有限元模态分析及峰值拾取法结果进行对比,各阶频率误差在7%以内,各阶振型曲线吻合较好;进一步分析单仓个体的振型曲线,发现贮料及单仓间的相互约束对群仓各阶振型影响较大。在进行群仓抗震设计时,建议至少取前3阶模态进行抗震分析,群仓从外到内进行分层设计,每层按照装料工况下的角仓进行抗震设计。

       

      Abstract: To obtain the dynamic parameters of the group silo for more reasonable seismic design, the model of the silo with cylinder supporting structure of a grain storage in Shanghai was made and the environmental excitation test was carried out. Considering the symmetry of the group silo model and the finite element modal analysis results of the model, the key measuring points, general measuring points and reference points were arranged at the position with large vibration response of the silo, and the acceleration response of each measuring point was obtained. Then, based on the modal parameter identification theory, introducing the transformation matrix, and solving the eigenvalue problem of the system matrix, then the inverse transformation was carried out to identify the first four order dynamic parameters of the group silo model. The identification parameters were compared with the results of finite element modal analysis and peak picking method. The frequency error of each order was less than 7%, and the curve of each order mode was in good agreement. Further analysis of the vibration mode curve of individual silos showed that storage materials and the constraints between single silos had a great influence on the vibration modes of each order of the group silo. It is recommended that at least the first three modes should be used for seismic analysis in the seismic design of the group silo, and it should be designed in layers from outside to inside, and each layer should be designed according to the corner silo with full-filled materials.

       

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