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Evaluation of survival stow position and stability analysis for heliostat under strong wind

  • Geological, Civil, Energy and Traffic Engineering
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Abstract

Heliostats are sensitive to the wind load, thus as a key indicator, the study on the static and dynamic stability bearing capacity for heliostats is very important. In this work, a numerical wind tunnel was established to calculate the wind load coefficients in various survival stow positions. In order to explore the best survival stow position for the heliostat under the strong wind, eigenvalue buckling analysis method was introduced to predict the critical wind load theoretically. Considering the impact of the nonlinearity and initial geometrical imperfection, the nonlinear post-buckling behaviors of the heliostat were investigated by load-displacement curves in the full equilibrium process. Eventually, combining B-R criterion with equivalent displacement principle the dynamic critical wind speed and load amplitude coefficient were evaluated. The results show that the determination for the best survival stow position is too hasty just by the wind load coefficients. The geometric nonlinearity has a great effect on the stability bearing capacity of the heliostat, while the effects of the material nonlinearity and initial geometrical imperfection are relatively small. And the heliostat is insensitive to the initial geometrical imperfection. In addition, the heliostat has the highest safety factor for wind-resistant performance in the stow position of 90-90 which can be taken as the best survival stow position. In this case, the extreme survival wind speeds for the static and dynamic stability are 150 m/s and 36 m/s, respectively.

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Authors and Affiliations

  1. The State Key Laboratory of Mechanical Transmission (Chongqing University), Chongqing, 400044, China

    Yu Feng  (冯煜) & Xiao-an Chen  (陈小安)

  2. College of Mechanical Engineering, Jiangsu University of Technology, Changzhou, 213001, China

    Wen-tao Shan  (单文桃)

Authors
  1. Yu Feng  (冯煜)
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  2. Xiao-an Chen  (陈小安)
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  3. Wen-tao Shan  (单文桃)
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Corresponding author

Correspondence to Xiao-an Chen  (陈小安).

Additional information

Foundation item: Project(CYB14010) supported by Chongqing Graduate Student Research Innovation Project, China; Project(51405209) supported by the National Natural Science Foundation of China

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Feng, Y., Chen, Xa. & Shan, Wt. Evaluation of survival stow position and stability analysis for heliostat under strong wind. J. Cent. South Univ. 23, 3006–3017 (2016). https://doi.org/10.1007/s11771-016-3364-x

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  • DOI: https://doi.org/10.1007/s11771-016-3364-x

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