三支点桥式起重机结构噪声预估及其影响因素研究

发布时间：2018-05-01 15:39

  本文选题：三支点桥式起重机 + 振动特性　； 参考：《工程设计学报》2017年05期

【摘要】：桥式起重机的动态特性直接影响其运行可靠性,而减速器齿轮系统各参数对其综合性能影响较大,因此有必要研究齿轮系统动力学特性随各参数变化的内在机理及变化规律,达到桥式起重机减振降噪的设计目的。利用ANSYS软件建立三支点桥式起重机整体有限元分析模型,在各级齿轮副接触线上施加内部动态激励,基于模态叠加法分析其振动特性,进而实现结构噪声的预估,并通过试验来验证仿真方法的可行性。在保证各级齿轮副中心距不变和总传动比相近的条件下,分析了不同模数、螺旋角、轴承支承刚度、结构阻尼比和负载下齿轮系统的振动特性和结构噪声,得到了系统振动加速度有效值、频谱图和结构噪声随各参数的变化规律。分析结果为桥式起重机相关参数的改进和减振降噪设计提供了理论依据和参考。
[Abstract]:The dynamic characteristics of bridge crane have a direct impact on its operational reliability, while the parameters of gear system of reducer have a great influence on its comprehensive performance. Therefore, it is necessary to study the inherent mechanism and variation law of dynamic characteristics of gear system with each parameter. The design purpose of reducing vibration and noise of bridge crane is achieved. The whole finite element analysis model of three-fulcrum bridge crane is established by using ANSYS software. The internal dynamic excitation is applied on the contact line of gear pairs at all levels. The vibration characteristics of the crane are analyzed based on modal superposition method, and the structural noise prediction is realized. The feasibility of the simulation method is verified by experiments. The vibration characteristics and structural noise of gear system under different modulus, helical angle, bearing support stiffness, structure damping ratio and load are analyzed under the condition that the center distance of each gear pair is invariable and the total transmission ratio is similar. The effective values of system vibration acceleration, spectrum diagram and structural noise varying with each parameter are obtained. The results provide a theoretical basis and reference for the improvement of bridge crane parameters and the design of vibration and noise reduction.
【作者单位】： 重庆大学机械传动国家重点实验室;江苏泰隆减速机股份有限公司;
【基金】：国家科技支撑计划资助项目(2015BAF06B02) 国家自然科学基金资助项目(51175524)
【分类号】：TH215
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本文编号：1830033