基于MPA算法的螺栓连接硬涂层圆柱壳弹性约束刚度逆辨识

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (23) : 164-172.

论文

基于MPA算法的螺栓连接硬涂层圆柱壳弹性约束刚度逆辨识

刘鑫，张月，杨建

作者信息 +

Inverse identification of elastic constrained stiffness of bolted hard-coating cylindrical shell based on MPA algorithm#br#

LIU Xin, ZHANG Yue, YANG Jian

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文章历史 +

摘要

针对螺栓连接硬涂层圆柱壳弹性约束刚度的逆辨识问题，如何在提高逆辨识精度及效率的基础上有效降低振动测试和时间成本仍面临挑战。为此，本文提出了一种基于MPA算法和模态振型识别的螺栓连接硬涂层圆柱壳弹性约束刚度逆辨识方法，该方法通过建立螺栓连接硬涂层圆柱壳动力学虚拟样机和弹性约束硬涂层圆柱壳动力学有限元模型，利用ANSYS-MATLAB联合仿真技术对不同预紧力条件下的约束刚度进行迭代辨识，数值试验结果表明该方法具有较好的逆辨识综合性能且成本较低。同时，以NiCoCrAlY+YSZ硬涂层圆柱壳为例，着重从单变量和多变量约束刚度影响分析方面进一步完善螺栓连接条件下约束刚度对硬涂层圆柱壳结构振动特性的作用规律。结果表明，随着各向约束刚度的增大，结构固有频率呈现先快速增加后逐渐稳定的变化趋势，当较大的刚度数值将使螺栓连接弹性约束转变为固支约束，且低周向波数固有频率对约束刚度变化较为敏感；轴向约束刚度ku对结构固有频率影响较为显著，而径向约束刚度kw和扭转约束刚度kt影响相对较小，且影响幅度取决于其周向波数n，当扭转约束刚度kt≥1×104 N∙m/rad时对结构固有频率影响可忽略不计。

Abstract

Regarding the inverse identification problem of the elastic constraint stiffness for the bolted hard-coating cylindrical shells, there still remains a challenge in effectively reducing vibration testing and time costs while maintaining high accuracy and efficiency. To address the problem, an inverse identification method is presented for the elastic constraint stiffness of the bolted hard-coating cylindrical shell, based on the Marine Predators Algorithm and modal shape identification. This method establishes a dynamic virtual prototype of the bolted hard-coating cylindrical shell and a dynamic finite element model of the elastic-constrained hard-coating cylindrical shell, by employing the ANSYS and MATLAB co-simulation technology to iteratively identify the constraint stiffness under different pretightening conditions. Numerical experimental results indicate the favorable comprehensive performance of this method in inverse identification as well as its cost-efficiency. Meanwhile, taking the NiCoCrAlY+YSZ hard-coating cylindrical shell as an example, further improvement is focused on the action pattern of constraint stiffness on the vibration characteristics of the hard-coating cylindrical shell under bolted conditions, particularly from the aspects of single-variable and multi-variable constraint stiffness influence analysis. The results demonstrate that as the constraint stiffness increases, the shell natural frequency exhibits a trend of rapid rise, followed by a gradual stabilization. When a larger stiffness value transforms the bolted elastic constraint into fixed-support constraint, and the lower circumferential wave number natural frequencies are more sensitive to the variation of constraint stiffness. The axial constraint stiffness ku has a significant impact on the shell natural frequency, while radial constraint stiffness kw and torsion constraint stiffness kt exerts relatively minor effects, and the magnitude of impact is depended on the circumferential wave number n. When the torsion constraint stiffness kt≥1×104 N∙m/rad, its impact on the natural frequency could be neglected.

导出引用

刘鑫, 张月, 杨建. 基于MPA算法的螺栓连接硬涂层圆柱壳弹性约束刚度逆辨识[J]. 振动与冲击, 2024, 43(23): 164-172

LIU Xin, ZHANG Yue, YANG Jian. Inverse identification of elastic constrained stiffness of bolted hard-coating cylindrical shell based on MPA algorithm#br#[J]. Journal of Vibration and Shock, 2024, 43(23): 164-172

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