共查询到19条相似文献,搜索用时 125 毫秒
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单兴鹏 《船舶标准化工程师》2020,53(4):19-22,38
结合大连中远海运重工改装的脱硫塔项目,介绍了船舶脱硫塔系统的分类和设计要领,总结提炼船舶脱硫塔系统设计成果,以达到掌握自主化设计的能力,为其他类似产品的设计和建造提供宝贵的经验。 相似文献
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石培培 《船舶标准化工程师》2023,(2):28-30
为减少环境污染、节省改装成本,对船舶脱硫改装技术进行介绍,阐述不同改装设计的优缺点,并分析脱硫改装市场前景。研究表明:相较于开式脱硫改装,闭式脱硫改装和混合式脱硫改装在环境保护方面具有显著优势。研究成果可为船舶脱硫改装设计提供一定参考。 相似文献
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火电厂烟气脱硫塔钢结构形式复杂,所受荷载多样,计算分析繁琐。通过结合工程实例,建立三维有限元模型,精确计算吸收塔在各种荷载组合作用下的工作性状。在有限元计算结果基础上,按照强度、整体稳定和局部稳定来验算吸收塔壳体的承载能力,保证结构的安全,可为此类特种结构设计提供参考。 相似文献
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文中以切向船用脱硫塔为研究对象。在对船用脱硫塔进行简化建模的基础上,使用Gambit软件对该模型进行网格划分。船用柴油机额定工况下,基于Fluent软件,计算脱硫喷淋塔内的三维流场。通过对模拟计算结果的定性分析,表明塔内气流场有着规律性的分布;证明数值模拟的方法计算船用脱硫塔的流场是可行的;为后续船用脱硫塔内喷淋方式布置的研究提供理论参考。 相似文献
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为更好分析和总结船舶脱硫改装工程中电气设计会涉及的内容和注意点,通过前期准备、详细设计、生产设计3个阶段对脱硫改装的电气设计进行描述,并适当结合工程实例进行说明阐述,为后续同类型的改装设计提供参考。 相似文献
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基于疲劳强度谱分析的火炬塔支撑结构设计 总被引:1,自引:1,他引:0
火炬塔是FPSO上主要装置之一,火炬塔支撑结构的疲劳强度是结构设计重点关注的对象。在介绍疲劳谱分析方法及BV-Homer软件的基础上,总结整理出基于该软件的疲劳谱分析的基本流程,利用BV-Homer软件对火炬塔支撑结构原设计方案的疲劳损伤进行了分析校核,根据计算结果对支撑结构设计方案进行了修改。研究表明:原设计方案的疲劳强度不满足规范要求,修改方案的疲劳寿命大幅提高,满足规范要求;火炬塔支撑外侧主管及外侧热点的疲劳损伤较大,设计时需要重点关注;增加肘板、热点区域结构板厚是提高疲劳强度的有效方式;基于谱疲劳分析的结构疲劳强度分析方法可应用于其他类似结构。 相似文献
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采用通用有限元程序ANSYS建立了2种不同结构形式的索塔有限元空间实体模型,利用这2种模型分别分析了某一大跨度斜拉桥的索塔在恒载和温度荷载共同作用下的受力特征,得出承台需设置系梁的结论,并对类似结构的设计提出了若干建议。 相似文献
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A linearized aero-hydro-servo-elastic floating wind turbine model is presented and used to perform integrated design optimization of the platform, tower, mooring system, and blade-pitch controller for a 10 MW spar floating wind turbine. Optimal design solutions are found using gradient-based optimization with analytic derivatives, considering both fatigue and extreme response constraints, where the objective function is a weighted combination of system cost and power quality. Optimization results show that local minima exist both in the soft-stiff and stiff-stiff range for the first tower bending mode and that a stiff-stiff tower design is needed to reach a solution that satisfies the fatigue constraints. The optimized platform has a relatively small diameter in the wave zone to limit the wave loads on the structure and an hourglass shape far below the waterline. The shape increases the restoring moment and natural frequency in pitch, which leads to improved behaviour in the low-frequency range. The importance of integrated optimization is shown in the solutions for the tower and blade-pitch control system, which are clearly affected by the simultaneous design of the platform. State-of-the-art nonlinear time-domain analyses show that the linearized model is conservative in general, but reasonably accurate in capturing trends, suggesting that the presented methodology is suitable for preliminary integrated design calculations. 相似文献
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We present an optimization study for the conceptual design of wind turbine floaters of the TetraSpar type. The optimization variables include all geometric dimensions of the floater, keel, mooring lines and tower design. A gradient based optimization method is applied to a mass proportional objective cost function. The objective function accounts for the different weight components of the floater, including secondary steel, the wind turbine tower, and the mooring system. A frequency domain response method is utilized, so that each design evaluation also takes into account the dynamic response for 12 wind speeds with associated wave conditions. Nineteen constraints are applied for static and dynamic response, natural frequencies, and fatigue at the bottom of the tower. Two reference designs are presented, namely one with a soft–stiff tower and one with a stiff–stiff tower. Due to the anti-phase coupling of the floater pitch and tower vibration, the soft–stiff tower needs a stronger floater stiffness in pitch. This design thus has a larger water plane area moment than the more compact stiff–stiff floater, which is found to be the least economical. A constraint analysis is next presented based on Lagrange multipliers and a relative cost index. We find that the strongest cost influence is exerted by the 3P tower frequency constraint for the stiff-stiff and soft-stiff designs. Finally, a third design variant with a free optimizable tower frequency is introduced. This design is found to be 11% cheaper than the soft–stiff design and highlights the potential cost savings of tower designs within the 3P region. 相似文献