【作者】 李葳；

【导师】 林麒；

【作者基本信息】 厦门大学 ， 机械电子工程， 2008， 硕士

【摘要】 造船门式起重机是船舶工业必不可少的重要设备之一。随着造船事业发展,为了缩短建造周期,普遍提高分段的重量,这使得造船门式起重机朝着大型化发展,同时对船体分段安装的灵活性提出了更高的要求。本文基于此对现有的造船门式起重机提出了一种新的结构——造船门式绳牵引并联起重机器人,以达到更好的灵活性和更大的起重量,并对此新型的造船门式起重机器人的主体进行了结构可行性的研究。本论文采用有限元方法对改造后的新型造船门式起重机器人结构进行了力学分析计算,从而考察其结构强度方面的可行性。文中首先研究了有限元法及其在造船门式起重机结构分析中的应用,详细推导了空间梁单元有限元理论的基本公式;接着在总结相关的造船起重机运行资料的基础上,按照整体建模的方式科学地建立了该造船门式起重机器人主体结构的有限元模型,以求得到相对准确的分析结果;为使得分析结果更具有实际参考价值,文中针对造船门式起重机在室外工作的特点,总结分析了大量有关的文献资料,根据造船门式起重机的实际工作条件,提出了合理的约束及加载方案;然后运用大型有限元软件ANSYS对造船门式起重机器人的有限元模型分别进行了静力分析、模态分析以及瞬态动力学分析,校核了结构的静强度、静刚度、动刚度以及疲劳强度,并在此基础上运用断裂力学方法对起重机主梁结构进行了疲劳寿命分析。虽然ANSYS是国际知名的集成化CAE软件,功能强大,非常适合于对造船门式起重机这类复杂机构进行建模和结构分析,但是,对于造船门式起重机这样一个超大型且复杂的工程机械,在建模过程中不可避免地需要采用大量的简化,从而造成计算分析所得数据存在某些不合理性。即便如此,本文分析所得的数据的变化趋势从总体上看是合理的,是符合造船门式起重机的基本工作状况的。因此,本文的研究成果为今后造船门式起重机结构的进一步优化设计提供了参考依据。更多还原

【Abstract】 Ship-building gantry crane is one of the most essential equipment for shipping manufacturing. With the development of ship-building, for shortening producing circle, generally, the weight of the subsection needs to be increased, which makes the crane become macro-scaled. At the same time, it needs a higher installing agility. In this paper, based on the exist crane, we give a new design precept, which can produce a higher flexibility and a bigger capability, and research for the feasibility of the new structure is also given.In this paper, we adopt finite element method to give mechanics analysis to the new ship-building gantry crane structure. And based on this analysis data, we can see about the feasibility for the new structure. In the beginning, the finite element method, as well as its application in gantry crane design has been researched, and the basic formula of the 3-D beam finite element theory can be precisely deducted. Subsequently, we build the finite element model by holistic modeling principle and issue the final analysis result. In addition, for the sake of a much more practical data, we have considered the environment, in which the crane works. And integrated the information in the literature, the accurate loading spot can be decided. Finally, we have processed a series mechanical simulation by using ANSYS to the model of the new structure, such as static analysis, mode analysis, and transient analysis. Based on the simulation result, the intension and stiffness can be reflected and checked up. At last, fracture mechanics method is used to analysis the fatigue life of the main beam.ANSYS is the most famous integrated CAE software in the world. Its powerful function is sufficient enough to build and analyze the complex structure model, including the Ship-building gantry crane. However, some pre-digestion in mode building process can not be avoided. So it must lead to produce some partly illogical data. Even though the situation is like this, we still can see data track which is shown by the simulation result is generally right. And the data can be considered as a correct reflection for the situation of the crane. In conclusion, the research harvest in this paper can give an accurate reference for the future development of Ship-building gantry crane.更多还原