| 陈沙古，谢晓忠，吴智睿，刘成.基于共模的耐压结构超差矫正评估方法研究[J].海洋工程,2025,(5):132~141 |
| 基于共模的耐压结构超差矫正评估方法研究 |
| Study on evaluation method for out-of-tolerance correction of pressure structure based on common model |
| 投稿时间：2024-08-09 修订日期：2024-09-24 |
| DOI：10.16483/j.issn.1005-9865.2025.05.013 |
| 中文关键词: 耐压结构 超差矫正 矫正力 共模策略 承载能力 |
| 英文关键词:pressure structure out-of-tolerance correction corrective force common model bearing capacity |
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| 中文摘要: |
| 在大型耐压结构建造过程中，超差问题难以避免，而超差矫正及其安全评估一直是行业内的工程难题。以常见的耐压结构合拢端口超差问题为研究对象，开展矫正措施和评估方法研究。根据矫正工装的结构特点，提出了一种矫正力的间接测量方法，可为矫正引起的结构内应力计算提供载荷条件。基于合拢端口的柔性-刚性连接假设，构建了一种用于局部结构矫正内应力和整体结构极限承载能力仿真计算的共模方法。采用该共模方法对舱段结构板壁差超差矫正进行仿真计算，研究了局部矫正内应力对舱段结构极限承载能力的影响。结果表明：由板壁差超差引起的矫正内应力对舱段结构承载能力的影响很小，基本可以忽略不计；但当超差情况较为严重，矫正引起的内应力水平达到材料的屈服强度时，超差矫正对舱段结构承载能力的影响则较大，会对耐压结构的安全使用造成影响。 |
| 英文摘要: |
| Out-of-tolerance is inevitable during the construction of large pressure structures, and their correction and safety assessment have long been engineering challenges in the industry. This paper investigates corrective measures and evaluation methods for closure port out-of-tolerance in pressure structures. An indirect measurement method for corrective force was proposed based on the structural characteristics of the correction fixture, providing loading conditions for calculating structural internal stress caused by correction. A common model method for simulating correction internal stress of the local structural and the ultimate bearing capacity of the overall structure was established based on the flexible-rigid connection assumption of the closure port. Using this common model, the influence of local correction internal stress on the ultimate bearing capacity of the cabin segment structure was analyzed through simulating the correction of plate wall deviation exceeding tolerance of cabin segment structures. The research results show that the correcting internal stress caused by such plate wall deviation exceeding tolerance has minimal effect on the ultimate bearing capacity of the cabin segment structure and can generally be neglected. However, when the out-of-tolerance condition is more severe and the stress induced by correction approaches the material's yield strength, the out-of-tolerance correction will significantly impact the bearing capacity and may compromise the safe use of the pressure structure. |
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