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An Overview of 3D Thin Shell Textile Preforms
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作者 Mohammad Toufiqul Hoque 《Journal of Textile Science and Technology》 2023年第3期183-197,共15页
The automobiles, aircraft, and lightweight industries continuously demand thin near-net-shape preforms just out-of-machine as close to the final shape. This study addresses the possibilities of 3D thin shell textile p... The automobiles, aircraft, and lightweight industries continuously demand thin near-net-shape preforms just out-of-machine as close to the final shape. This study addresses the possibilities of 3D thin shell textile preform as the solution of lightweight reinforcement in various applications. Investigation into the development of 3D thin shells has led to different manufacturing processes. However, 3D thin shell preforms are mostly made by weaving and knitting, but nonwoven, winding, and/or layup techniques have been reported for over a decade. Owing to the complex thin shell manufacturing processes, they are not similar to the conventional methods. The different 3D thin shell preforms can extend the opportunities for new applications in various technical fields. This study presents existing research gaps and a few potential issues to be solved regarding 3D thin shell preforms in the near future. 展开更多
关键词 3D Thin Shell Preform WEAVING KNITTING BRAIDING NONWOVEN winding and/or layup
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An Overview of 3D Thin Shell Textile Preforms
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作者 Mohammad Toufiqul Hoque 《Journal of Flow Control, Measurement & Visualization》 2023年第3期183-197,共15页
The automobiles, aircraft, and lightweight industries continuously demand thin near-net-shape preforms just out-of-machine as close to the final shape. This study addresses the possibilities of 3D thin shell textile p... The automobiles, aircraft, and lightweight industries continuously demand thin near-net-shape preforms just out-of-machine as close to the final shape. This study addresses the possibilities of 3D thin shell textile preform as the solution of lightweight reinforcement in various applications. Investigation into the development of 3D thin shells has led to different manufacturing processes. However, 3D thin shell preforms are mostly made by weaving and knitting, but nonwoven, winding, and/or layup techniques have been reported for over a decade. Owing to the complex thin shell manufacturing processes, they are not similar to the conventional methods. The different 3D thin shell preforms can extend the opportunities for new applications in various technical fields. This study presents existing research gaps and a few potential issues to be solved regarding 3D thin shell preforms in the near future. 展开更多
关键词 3D Thin Shell Preform WEAVING KNITTING BRAIDING NONWOVEN winding and/or layup
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风电场风电机组启停与偏航同步控制优化
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作者 汪泉 张照港 +1 位作者 徐唐杰 柳柏杨 《科学技术与工程》 北大核心 2024年第34期14666-14671,共6页
针对已有的风电场,往往通过偏航控制来提升风电场中整体功率输出,却忽略了风力机的启停与偏航协同控制,不能最大限度地提升风电场的功率输出。基于偏尾流叠加模型,并通过实例验证了该模型的准确性,采用随机数[0,1]分布来控制风电场中的... 针对已有的风电场,往往通过偏航控制来提升风电场中整体功率输出,却忽略了风力机的启停与偏航协同控制,不能最大限度地提升风电场的功率输出。基于偏尾流叠加模型,并通过实例验证了该模型的准确性,采用随机数[0,1]分布来控制风电场中的风力机的启停状态,提出了一种基于启停与偏航同步控制的风电场布局优化。该策略以Chapman Ranch风电场最大功率输出为目标函数,结合风电场的风资源数据,利用粒子群算法分别对风电场启停、偏航控制和启停与偏航同步控制这3种模型进行优化。研究结果表明:考虑偏航控制时,风电场单风况功率提升为11.9%;以启停与偏航同步控制时,风电场单风况功率提升可达17.7%。研究结果对于如何提高已有风电场的整体功率输出具有一定的理论指导意义。 展开更多
关键词 三维偏尾流模型 启停与偏航 风电场布局 粒子群算法
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