巴拿马型73 000 t散货船横舱壁结构损坏分析和处理方法

以某巴拿马型营运散货船为研究对象,分析该船货舱区域横舱壁结构损坏的根源是设计结构计算应力超过许用值,通过细化有限元分析计算,对重压载舱横舱壁区域提出中间槽条加深方案,在槽形舱壁斜板同一平面的下墩结构内设置附加肘板,以降低因结构突变而产生的应力集中问题。     

垂直船艏在波浪中快速性综合分析研究

摘要：垂直船艏是江南造船（集团）有限责任公司自主研发的一型性能优异的船艏，为了分析其在波浪中的快速性能，针对两型不同船艏的散货船，通过耐波性对比试验，结合9条典型散货船航线及其全年的波浪特性，模拟采用不同船艏的两个船队在相同航线上的年油耗和年货运量，得出的结论充分说明垂直船舶在波浪中的快速性能优良，值得在船舶设计界推广应用。     

散货船极限强度的标准化非线性有限元分析

依据《双舷侧散货船结构直接计算分析指南》，运用MSC ．Nastran对某35000 t级散货船进行货舱结构强度的有限元分析，运用M SC ．M arc对其进行极限强度的非线性有限元分析，得到该散货船真实的安全余量．     

准班轮模式下干散货船枢纽港转运及联营优化

以不定期方式为主的传统国际干散货运输市场开始出现定时定班的准班轮化运营方式，同时，40万t超大型船舶的增加将干散货船由点到点的直达运输转变为部分航线的枢纽转运结构.本文对干散货船枢纽港转运网络的转运节点和不同承运人联营合作后船队运力结构进行研究.考虑港口靠泊能力限制和起讫港口进出口需求约束，建立基于改进遗传算法的干散货船枢纽港转运网络模型；以中国进口铁矿石运输市场为例进行仿真，并对比不同运力规模合作方案.结果表明，枢纽转运网络收益优于传统直达运输，收益提升效果与干支线运力规模相关；枢纽转运节点以可以挂靠大型矿砂船的港口作为首选，同时需要兼顾选择部分转运港口，以辐射中部、南部港口.     

Low cost carrier competition and route entry in an emerging but regulated aviation market – The case of China

Although China lags behind other liberalized aviation markets in low cost carrier (LCC) development, its largest LCC, Spring Airlines, has achieved rapid growth in traffic volume and revenue, as well as consistent profitability, since its inauguration in 2005. Our empirical study on the Chinese domestic market suggests that Spring adopts a “cream skimming” strategy to enter high-priced routes, allowing the carrier to achieve both a very high load factor and considerable profitability. Spring’s capacity and market share on individual routes are constrained to low levels, likely due to government regulation and/or a “puppy dog” strategy adopted by the carrier. As a result, Spring is able to achieve fast growth without triggering price wars. To incumbent full service carriers, high speed rail (HSR) services impose much more significant competitive pressure than low cost carriers. Similar to LCCs in developed markets, Spring prefers to serve markets with high traffic volumes out of its operational base in Shanghai. Overall, Spring’s entry decision is not significantly affected by competition, either from full service airlines or HSR services. Our investigation suggests that LCCs have potential to introduce more competition but are yet to be a “game changer” in China. Further deregulation of the domestic market is needed.     

76 000 dwt散货船发电机容量的确定

从介绍76 000 dwt散货船的电力负荷估算书着手,阐述了确定该船发电机容量的方法。     

Statistical properties of bulk carrier longitudinal strength

The paper focuses on time-variant longitudinal strength of bulk carriers under corrosion wastage, applying both Taylor series expansion method and Monte Carlo simulation. Hull girder section modulus and ultimate bending moment capacity are determined, by classical beam theory and the commonly applied incremental-iterative approach, respectively. Two main aspects are fully discussed and investigated, according to the final recommendations of last ISSC Report. The former regards the covariance between annual corrosion rates of individual structural members, commonly assumed as uncorrelated. Really, as it is conceivable that a certain correlation exists, three different cases are investigated: uncorrelated variables, fully correlated variables, full correlation between structural members belonging to the same category of compartments. The latter investigates the probability density function of both hull girder section modulus and ultimate bending capacity, because the Central Limit Theorem cannot be applied when correlation among random variables exists. Finally, as a test example, the bulk carrier section, presented in the last ISSC benchmark study, is analysed.     

VLCC翼桥振动分析及相关技术研究

分析了超大型油船（VLCC）翼桥产生振动的原因,运用有限元（FEM）静力学分析、模态分析和频域响应分析理论进行实船撞击和试航振动测量,通过理论与实际相结合,提出了综合解决船舶振动问题的方案。     

20.6万DWT散货船前期开发概述

介绍了20.6万DWT散货船前期开发情况。该船有较大的舱容和载重量,在保证较高航速的情况下仍具有良好的经济性。此类船型的开发重点为线型优化和空船质量控制。通过合理分舱,可以有效降低设计弯矩,有利于减轻空船质量。     

散货船货舱区主甲板电装生产设计研究

针对散货船货舱区主甲板的电缆敷设特点,设计一种罩壳式电缆托架敷设形式来代替目前正普遍使用的电缆管敷设形式,并探讨该形式的可行性和有效性.