Model updating of a ϕ150 mm mirror including joint parts

Cui Ding; Deng Zhaoxiang; Ye Changchun; Xian Yuqiang

doi:10.11884/HPLPB201931.190012

Volume 31 Issue 9

Sep. 2019

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Article Navigation > High Power Laser and Particle Beams > 2019 > 31(9): 091001

Cui Ding, Deng Zhaoxiang, Ye Changchun, et al. Model updating of a ϕ150 mm mirror including joint parts[J]. High Power Laser and Particle Beams, 2019, 31: 091001. doi: 10.11884/HPLPB201931.190012

Citation:

Cui Ding, Deng Zhaoxiang, Ye Changchun, et al. Model updating of a ϕ150 mm mirror including joint parts[J]. High Power Laser and Particle Beams, 2019, 31: 091001. doi: 10.11884/HPLPB201931.190012

Cui Ding, Deng Zhaoxiang, Ye Changchun, et al. Model updating of a ϕ150 mm mirror including joint parts[J]. High Power Laser and Particle Beams, 2019, 31: 091001. doi: 10.11884/HPLPB201931.190012

Citation:

Cui Ding, Deng Zhaoxiang, Ye Changchun, et al. Model updating of a ϕ150 mm mirror including joint parts[J]. High Power Laser and Particle Beams, 2019, 31: 091001. doi: 10.11884/HPLPB201931.190012

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Model updating of a ϕ150 mm mirror including joint parts

doi: 10.11884/HPLPB201931.190012

1.
Institute of Applied Electronics, CAEP, P. O. Box 919-1012, Mianyang 621999, China
2.
School of Automotive Engineering, Chongqing University, Chongqing 400044, China
3.
The State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400044, China

Received Date: 2019-01-14
Rev Recd Date: 2019-03-27
Publish Date: 2019-09-15

Abstract

Abstract

For the problem of precision deficiency of the analysis model caused by nonlinear factors of the joint parts in the ϕ150 mm mirror, the equivalent linearized model and the model updating method were presented. First, the experimental modal parameters of the ϕ150 mm mirror within 800 Hz were tested and obtained under the actual assembly and boundary conditions. Then, according to the dynamic characteristics of the interface joints, the equivalent finite element model of the mirror was classified as the connection model of fixed parts, the screw model and the equivalent gap model of the clamping parts, which were modeled by beam elements, rigid elements and spring elements. Finally, taking the measured experimental data including natural frequencies and modal shapes as the objective function, the dynamic model of the ϕ150 mm mirror was corrected by using optimization method. At the same time, the modified model was divided into two parts according to the characteristics of the joints by adopting the idea of hierarchical and step-by-step modification to improve the efficiency of the correction process. The results indicate that the average error of natural frequencies within 800 Hz after model updating is 1.6%, and the minimum value of modal assurance criterion is greater than 0.8, which improves the accuracy of the dynamic model for the reflective mirror. And the equivalent linearized model is also verified.
- mirror,
- dynamic modeling,
- joint part,
- model updating,
- modal

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References(14)

References

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