超大型油船压载水舱分舱的优化研究

通过对国际船级社协会（IACS）URS11规范和其最新建议案的研究,结合已有VLCC船压载水舱分舱布置型式的分析,提出一种符合URS11最新要求的VLCC压载水舱分舱的优化方案,以达到降低船体设计最大中拱静水弯矩的目的。     

铁路边坡工程岩土力学参数敏感性分析

基于可靠性理论,结合某边坡工程设计资料,采用分位值法对稳定性可靠度指标β进行计算,同时采用单变量分析方法,分别计算并分析了岩土抗剪强度参数对β值的影响程度。分析表明,抗剪强度参数对β值的影响非常显著,在采用极限状态设计方法时,应重点关注这一情况,采取切实可行的方法保证其准确性。     

客车出口澳大利亚的标准研究

客车出口澳洲,需要了解澳洲的有关法规。本文介绍我国M3类客车出口澳洲所需满足的澳大利亚的汽车设计规则。     

Hydrodynamic modelling of a multi-body wave energy converter using the Moving Frame Method

Significant wave energy conversion may be achieved with multiple floats with several modes of motion combining constructively to generate power. With the M4 system, power take off is at hinges to absorb resulting pitch motions. Complexity increases with number of floats and conventional vectorial multi-body dynamics may be conveniently replaced by the recently formulated moving frame method based on the calculus of variations to avoid free-body diagrams and joint reaction forces. Furthermore by utilising group theory to gather spatial rotations and angular velocities in a common structure, the obtained notation is general and straight-forward to apply for single and multi-body systems. This paper lays the foundations for incorporating hydrodynamic forces into the moving frame method. The method is applied to 3, 6 and 8 float cases in regular and irregular waves with results compared to the vectorial method and experimental measurements, showing close agreement. It is suggested that this is a more natural and general approach for complex multi-body, multi-hinge hydrodynamics systems.     

福州仓山龙津阳岐水系补水活水策略研究

以福州仓山龙津阳岐水系补水活水项目为例，结合项目所在区域特征，采用适合平原河网地区且能灵活调度水工建筑物的MIKE 11模型，对不同工况下的补水活水方案进行模拟。所提出的补水方案是：丰水期进行自然纳潮补水，补水方向为南引北排；枯水期因闽江潮汐动力不足，应利用泵站补水，补水方向则为东引西排和南引北排。所得结论可为后期水系运维调度提供指导。