摘要：目前我国使用的船用减振元件多为被动式减振元件,如橡胶减振器、钢丝绳减振器等.而被动式减振元件都有在低频激振力作用下减振效果差的缺点.基于将传统的减振元件与智能元件相结合的思想,提出了全新的船用抗冲击隔离器设计理念.应用现有较成熟的减振元件钢丝绳弹簧和智能出力元件磁流变阻尼器设计了智能抗冲击隔离器,并进行了有限元仿真分析.计算结果表明,智能隔离器在各个频段都有较好的减振性能,尤其是在低频段,减振效果明显优于传统减振元件.同时也具有良好的抗冲击特性,尤其是在冲击载荷较强,系统会发生二次碰撞时,智能隔离器的抗冲效果明显优于传统减振元件.

摘要：In this paper,the mechatronic design and maneuverability analysis of a novel robotic shark are *** obtain good maneuverability,a barycenter regulating device is designed to assist the posture adjustment at low *** on the Newton-Euler approach,an analytical dynamic model is established with particular consideration of pectoral fins for threedimensional *** hydrodynamic coefficients are computed using computational fluid dynamics(CFD)*** amplitudes and phases are determined by fitting an optimized fish body *** performance of the robotic shark is estimated by varying the oscillation frequency and offset *** results show that with oscillation frequency increasing,the swimming speed increases *** robotic shark reaches the maximum swimming speed of 1.05 m/s with an oscillation frequency of 1.2 ***,the turning radius decreases nonlinearly as the offset angle *** robotic shark reaches the minimum turning radius of 1.4 times the body length with 0.2 Hz frequency and 12°offset *** the vertical plane,as the pectoral fin angle increases,the diving velocity increases nonlinearly with increase rate slowing down.

摘要：The concepts of floating structure plays a very important role in deepwater projects; and the design of the floating structure is one of the most important tasks in the project. The importance of the floating structure in offshore projects can be demonstrated in the following several areas： the substantial dynamic structure responses due to wave loading and current loading; the limited motion requirements of risers in deep water; and the increasing difficulty of installation for different components of the system. Three major technical aspects have to be considered, i.e. the strength of structure, the fatigue resistance capacity of the system, and local and global stability of the structure. This paper reviews the current design practice of floating structures, evaluates the main tasks during the design and associated major technical requirements, and addresses the major technical challenges encountered during the design. As a close-out of the paper, the authors discuss some potential future developments in the design of floating structures.

摘要：以浮筒式水上飞机的浮筒为研究对象,以滑行阶段受到的水动阻力较小和产生较小水花溅射现象为最终目标,利用CAD建模软件CATIA实现对浮筒外形的模型建立,运用流体计算软件STAR-CCM+对浮筒在水上飞机水面滑行阶段时的水动力特征进行了数值模拟计算。最后,应用近似模型优化方法,采用NSGA-II算法实现了浮筒横剖面和断阶处的多目标优化设计,并将所得结果与CFD计算结果进行了对比,验证了优化的可行性。

摘要：以水下管汇的筒型基础结构为研究目标,提出满足目标地质条件的筒型基础设计方案,并确保其结构强度和稳定性满足相应的设计规范要求。根据地质情况调研并以我国南海海域的土壤条件为例,分析总结出分布最广土壤、强度最弱土壤、近岸典型土壤等3种典型土壤及其4种典型工况。由此设计出两型4桩锚桩的筒型基础模型,通过有限元分析计算,证明其结构强度和稳定性在目标地质条件下符合相关规范要求。

摘要：散货船舱口角隅的疲劳强度问题历来为人们所关注。文章以1艘174000载重吨散货船作为实船算例,在Patran中建立有限元模型,依据CCS《船体结构疲劳强度指南》(2018)对船舯6号舱室舱口角隅的疲劳强度进行评估。基于BP神经网络和MOPSO算法设计了2种优化圆形舱口角隅的方法,子模型法和全局模型法。最后,对比分析2种方法的结果数据,提出了寿命重量比概念来评估各种角隅,分析了圆形角隅的重量对疲劳寿命的影响趋势,得到1组较优的角隅结构形式,供其他设计者参考。

摘要：新型的催化氧化活性炭对硫化氢等臭味气体具有很强的催化氧化能力,并可通过水洗再生,克服了传统活性炭再生困难的缺点,且与其它除臭方法相比具有除臭效率高、运行管理方便等优势,是环保、市政等领域除臭的最先进技术之一。根据臭气浓度和气量的不同可设计不同类型的催化氧化活性炭除臭系统,以满足各类不同的除臭需求。