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As the research object, a V-type structure in fixed leg of gantry crane applied in handling bridge sections is analyzed, and its FEA model is built. According to the result of the typical load case, there is stress concentration at the V-type structure. Three factors affecting the stress concentration are analyzed based on response surface methodology (RSM), including V-type angle, corner radius and plate thickness of V-type structure. The results show that the ascending sequence of influence is the corner radius, the plate thickness and the V-type angle. Then, the trends of the maximum stress as it varies with a single factor are analyzed. As a result, within a certain range, the maximum stress decreases with the increase of V-type angle in a linear relationship, and decreases rapidly with the increase of the corner radius and then tends to level off, and decreases with the increase of the plate thickness in an inversely proportional function relationship. Furthermore, according to multi-factor coupling influence analysis, the agent model reflecting the relationship between influencing factors and stress mapping is established and its accuracy is verified these provide the technical basis for the subsequent stress-life prediction.

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Influent Factors Analysis and Stress Prediction of V-Type Structure Based on RSM

  • 会议论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年

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  • Chu Jiang,
  • Xin Wang,
  • Guohua Wang,
  • Yang Teng,
  • Yan Wu

摘要

As the research object, a V-type structure in fixed leg of gantry crane applied in handling bridge sections is analyzed, and its FEA model is built. According to the result of the typical load case, there is stress concentration at the V-type structure. Three factors affecting the stress concentration are analyzed based on response surface methodology (RSM), including V-type angle, corner radius and plate thickness of V-type structure. The results show that the ascending sequence of influence is the corner radius, the plate thickness and the V-type angle. Then, the trends of the maximum stress as it varies with a single factor are analyzed. As a result, within a certain range, the maximum stress decreases with the increase of V-type angle in a linear relationship, and decreases rapidly with the increase of the corner radius and then tends to level off, and decreases with the increase of the plate thickness in an inversely proportional function relationship. Furthermore, according to multi-factor coupling influence analysis, the agent model reflecting the relationship between influencing factors and stress mapping is established and its accuracy is verified these provide the technical basis for the subsequent stress-life prediction.