Valuation mismatch and shipping q indicator for shipping asset management

ABSTRACT

This paper aims to develop an adaptation of the Tobin Q investment model for the shipping asset management in order to monitor valuation mismatch and bubble pricing of shipping assets. In this circumstance, the market prices of various shipping assets (e.g., Capesize or Panamax dry bulk carriers in different age profiles) are compared to the measured long-term asset value with second-hand ship prices. The mark-to-market prices of shipping assets are led by current market trends and freight rates, while the long-term asset value is estimated by using past data under certain assumptions (mean reversion, trend reversion). The discrepancy between market prices and the long-term nominal value of a shipping asset reflects any mispricing, which in turn sheds light on investment timing and market entry-exit decision.     

Overview of maritime research publications by the late Professor Richard O. Goss

We lost one of the great maritime scholars in 2017—Professor Richard Goss, who is considered one of the founders of maritime economics. He was a pioneer and a most influential leader in establishing the discipline of maritime economics worldwide. This paper revisits his research by examining major issues and assessing his arguments by surveying empirical works that have been conducted after his works in the literature. His economic thoughts are based on laissez-faire, welfare economics, and Marshallian economics. Comparing his arguments with major findings in ensuing research, several research directions are suggested.     

全舰（船）统一姿态基准系统中甲板变形分析

为了研究舰船甲板的变形,此文对甲板结构进行了简化,建立了甲板受力的数学模型。分别在舰船处于中垂和中拱两种状态下,对舰船甲板受横向载荷、总纵弯矩及两者共同作用下的变形进行了计算。     

A theory of coupled beams for strength assessment of passenger ships

This paper describes a coupled beam method, which estimates elastic response in the longitudinal bending of a passenger ship with a large multi-deck superstructure. The method can be applied during an early project stage, when detailed three-dimensional finite element modelling is not yet possible. The theory is based on the assumption that each deck in the superstructure and also the main hull can be considered as a thin-walled beam. These beams are coupled to adjacent beams with springs modelling vertical and shear stiffness. The shear effect in the side and deck structures is included with options for large openings. As a result, the method allows for the calculation of the normal stresses and vertical deflections in the arbitrary location of the hull girder. Average longitudinal displacements of deck structures and shear stresses in the side structures can be estimated as well. Simplified structures were analysed in order to validate the coupled beam method against the three-dimensional finite element method.     

舰船RCS整形设计中的电磁分析

采用物理光学法导出了金属平板RCS与倾斜角的理论公式，讨论了在舰船RCS整形设计中如何采用该公式进行折衷设计和电磁分析。     

利用伪力法计算带限位器的船舶设备隔振系统冲击响应

建立了带限位器浮筏隔振系统的非线性系统模型,利用伪力(pseudo-forces)法计算了带有限位器的浮筏隔振系统模型的冲击响应,分析了限位器参数对冲击响应的影响.设计制作了带有限位器的浮筏隔振系统试验模型,进行了冲击试验研究.数值计算与试验结果的比较表明,伪力法在计算带限位器的舰船设备隔振系统冲击响应时的适用性和有效性.     

破损船体极限强度非线性有限元分析

本文基于通用有限元系统,结合船体破损机理和初始缺陷处理方法,建立船体极限强度非线性有限元分析的完整框架.利用对水面舰船和双壳油船极限强度模型试验的比较验证,合理解决非线性有限元分析的关键技术,并对完整和破损船体极限强度进行非线性有限元法分析.然后,在模型试验和非线性有限元分析的基础上提出面向设计的适合破损船体和双向弯曲状态的船体极限强度分析的改进解析方法.     

多目标多层次船型方案模糊优选法

船型方案优选是一个多目标、多层次并含有模糊信息的决策问题,需要考虑的因素往往很多.本文通过划分相互关联的有序层次结构使问题条理化,然后利用文献[1]与文献[2]提出的模糊模式识别理论模型与模糊关系优选理论模型,以低层次的输出作为高层次的输入,对每一层次的单元系统进行优选计算,最后利用级别向量的特征值进行排序,对船型方案进行优选.算例说明,模型建立正确,计算结果可信,各方案的综合评判值离散性大.这一方法为合理选择船型方案提供了参考.     

船用柴油机生产计划与调度

提高大功率船用柴油机的生产能力和水平,对提高我国造船行业的国际竞争力具有重要意义.针对某企业船用柴油机的生产,提出了一种实用的主生产计划和车间作业计划的调度算法.该算法由网络计划（CPM）算法和混合启发式算法组成.最后通过实际应用验证了该算法的有效性.     

铝基牺牲阳极阴极保护在海船压载水舱中的应用研究

海船压载舱使用海水压载，引起船体板的腐蚀，焊缝处会产生蚀孔漏水。采用铝基牺牲阳极阴极保护系统可大为降低腐蚀速率，使压载水舱的保护度在７８％～９５％，保护与未作保护的试片腐蚀率相差８倍，效果明显。