某直升机起降平台采用板块拼装结构以便于运输和快速加装到集装箱船甲板上。为分析评估起降平台结构设计强度，对比各船级社规范的适用性并选择CCS规范作为主要参考规范，通过有限元法分析均布载荷、直升机着陆冲击和系留工况下的平台设计强度，采用塑性分析法评估了平台结构在托盘掉落工况下的塑性变形。分析评估结果表明，以CCS规范为参考的许用应力法结合极端工况下的塑性分析法可满足特殊结构起降平台的强度分析要求，允许发生适度局部塑性变形可有效降低结构重量和成本。
A helideck adopts assembled structures for convenient transportation and quick installation on the deck of container ships. In order to analyze the structure design and strength of the helideck, the applicability of the rules from different classification societies is compared firstly and CCS rules is selected as main reference. Then the strength of the helideck under uniform load, landing impact load and Mooring load is analyzed by finite element method. The plastic deformation of plate structure under the falling impact load is evaluated by plastic analysis method. The analysis results show that the allowable stress method based on CCS rules and the plastic forming method for extreme working conditions can satisfy the requirement of analysis, the weight and cost of the helideck can be effectively reduced if the local plastic deformation of the structure was allowable.
2020,42(9): 179-184 收稿日期：2020-05-13
DOI：10.3404/j.issn.1672-7649.2020.09.035
分类号：U663.6
基金项目：国家交通战备“十三五”科研项目(JTZB2016-18)
作者简介：王琦(1981-),男,硕士,工程师,主要从事舰船保障系统研究
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