【作者】 金勇；

【导师】 海鹏洲； 刘正林；

【作者基本信息】 武汉理工大学 ， 载运工具运用工程， 2002， 硕士

【摘要】 随着交通运输业的发展，营运、效益、安全均对船舶的可靠性提出了更高的要求。作为船舶关键部件的尾管装置已不能继续沿用传统的结构型式和常规的静态设计方法，这日益成为世界航运界关注的热点。 船舶尾管轴承是一种受力复杂、结构特殊的滑动轴承，它在实际工作中处于极其恶劣的润滑状态下，常常产生严重的磨损而导致尾轴承的过早失效，这对船舶安全航行和营运经济效益带来很大的影响。为了改善尾管轴承的性能，必须对传统的尾管轴承设计方法进行改进，提出一种行之有效的动态设计方法，以提高船舶尾管轴承的使用寿命，使其处于最佳运行状况。 本论文力图将螺旋桨流体激振力这项动态因素和船舶尾管轴承的润滑状态结合起来，进行多项变量的润滑特性的分析和计算，为计入螺旋桨流体激振力的船尾轴承润滑特性计算探索出了一条可行的方法，并为将来全面计入各种动态因素建立平台。 具体而言，本文主要包括以下几方面的主要内容： (1)分别构建了船舶轴系横向振动和船舶尾管轴承润滑性能计算的数学模型。这是论文进行计入螺旋桨流体激振力的船尾轴承润滑特性计算的理论依据。通过对它们的研究，为论文系统软件的开发提供了理论基础。 (2)应用传递矩阵法，研究了以螺旋桨流体激振力为激振源的轴系横向振动模型，求出其在尾轴承处的振动响应特性。 (3)通过对Reynolds方程的适当修改，利用流体动力润滑理论和有限元素法对数学模型进行求解，研究尾轴承压力分布在各阶响应下的变化，并进而研究表征船尾轴承动态特性的油膜刚度、阻尼系数在各阶响应下的变化。并由此提出了对船舶尾管轴承动态设计方法的若干讨论。 (4)介绍了船舶尾管系统软件的开发和使用。 (5)针对实船数据进行试算，验证模型的正确性和软件的可用性，并针对其结果进行了相关分析。 (6)对水润滑尾轴承进行了摩擦磨损试验，验证模型对水润滑尾轴承润滑特性计算结果的正确性。更多还原

【Abstract】 With the development of the Transportation, running benefit and safety all put forward higher requirement about the dependability of ships. The stern tube instrument, pivotal parts of ships, can not follow the traditional structure type and the routine static design technique any more. It has become the hotspot of the shipping industry in the world.The marine stern tube bearing is a special structure and complicated load sliding bearing, which is always under foul lubricative state in real work, and always produces bad abrasion to get premature invalidation. This brings a great influence to ship’ s safely sailing and economic benefit. So, to ameliorate its capability, we must betterment the traditional design technique and put forward a effective dynamic design technique to increase its work life and stay in best work status.This thesis tried to connect the dynamic factor of the propeller hydro-oscillation force and the lubricative state of it to analyze and calculate the lubricative characteristics of it with many variables, and them to explore a feasible way for the lubricative characteristics calculation of it, reckoning the propeller hydro-oscillation force in and put up a flat roof for reckoning all dynamic factor in future.Concretely, the main contents are obtained in this paper as follows:1. It constructed the math model of the ship shafting transverse vibration and the lubricative capability calculation of stern tube bearing. This was the theory gist of the thesis to calculate it, reckoning the propeller hydro-oscillation force. By the research on them, it made the theory basis for the opening of the system software.2. By transfer matrix technique, it studied the shafting transverse vibration model, whose fountain is hydro-oscillation force, and sought the respond characteristics of stern tube bearing.3. By modifying Reynolds equation properly and applying hydro-dynamic lubricative theory and finite element theory, it sought the answer of the math model and studied the press’ s variety of stern tube bearing under every rank respond, and more about the oil film stiffness and damp coefficient, and at last put some discusses about the dynamic design technique of stern tube bearing.4. Introduced the opening and using of the stern tube system software.5. Calculated the given data to validate the correction of the model and available of software, and analyzed the results.6. Took the friction and wearing trial to validate the correcting of results of water-lubricated bearing lubricative characteristic.更多还原