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<p>Flow-induced vibration in the cooling pipeline is a significant source of instability that threatens the precision of the variable-angle plane grating monochromator (VA-PGM) at the Hefei Advanced Light Facility. To address this challenge, a comprehensive framework integrating sensitivity analysis and multi-objective optimization is employed to optimize the pipeline structural design and reduce flow-induced vibration. A parametric finite element analysis of the pipeline is developed to investigate the sensitivity of geometric parameters, and a response sample space is generated through fluid-structure interaction simulations. A meta-model of optimal prognosis (MOP) is then constructed to approximate the system’s behavior for global sensitivity analysis, which integrates surrogate model selection and evaluation to automatically determine the most appropriate meta-model. The established MOP ensures that the sensitivity analysis is based on the optimal meta-model, identifying the bending radius and angle as the key factors influencing vibration characteristics. An evolutionary algorithm methodology is adopted for multi-objective optimization based on the constructed MOP, resulting in the optimal combination of geometric parameters that minimizes vibration displacement. The optimized geometric parameters are validated through comprehensive VA-PGM simulations, resulting in a 52.5% reduction in the maximum relative angular vibration displacement between critical optical components. This demonstrates the effectiveness of the comprehensive framework, providing a reference solution for the structural stability design of advanced light facilities.</p>

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Multi-objective optimization of cooling pipeline stability for the Hefei Advanced Light Facility

  • 期刊论文

  • 发表日期：

    2026年7月8日

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  • Guanghui Han,
  • Xinyu Lian,
  • Jixia Yi,
  • Huaxia Deng,
  • Mengchao Ma,
  • Xiang Zhong,
  • Yang Peng,
  • Zhanglang Xu,
  • Shen Wei,
  • Xinglong Gong

摘要

Flow-induced vibration in the cooling pipeline is a significant source of instability that threatens the precision of the variable-angle plane grating monochromator (VA-PGM) at the Hefei Advanced Light Facility. To address this challenge, a comprehensive framework integrating sensitivity analysis and multi-objective optimization is employed to optimize the pipeline structural design and reduce flow-induced vibration. A parametric finite element analysis of the pipeline is developed to investigate the sensitivity of geometric parameters, and a response sample space is generated through fluid-structure interaction simulations. A meta-model of optimal prognosis (MOP) is then constructed to approximate the system’s behavior for global sensitivity analysis, which integrates surrogate model selection and evaluation to automatically determine the most appropriate meta-model. The established MOP ensures that the sensitivity analysis is based on the optimal meta-model, identifying the bending radius and angle as the key factors influencing vibration characteristics. An evolutionary algorithm methodology is adopted for multi-objective optimization based on the constructed MOP, resulting in the optimal combination of geometric parameters that minimizes vibration displacement. The optimized geometric parameters are validated through comprehensive VA-PGM simulations, resulting in a 52.5% reduction in the maximum relative angular vibration displacement between critical optical components. This demonstrates the effectiveness of the comprehensive framework, providing a reference solution for the structural stability design of advanced light facilities.