多激励源作用下矩形简支薄板减振方法研究

发布时间：2018-01-05 23:22

本文关键词：多激励源作用下矩形简支薄板减振方法研究　出处：《华东理工大学》2016年硕士论文　论文类型：学位论文

【摘要】：引起船舶甲板振动的内部振源主要有主机、螺旋桨和工作机(如电机、鼓风机和泵等)。本课题研究的是工作机引起的船舶甲板振动的减振方法。一般地,船舶上采取的减振方法是添加隔振器或动力消振器,这两种减振方法在应用上的局限性是需要增加额外的设备,消耗额外的能量等。针对这一问题,本文提出了通过抑制振源强度的方法对船舶甲板进行减振的方法,即通过振源之间互相抑制作用,达到减小船舶甲板振动的目的。该减振方法的优势是不需要添加额外装置,成本低,节省能耗。本文的研究目标是提出四边简支的矩形薄板在多个振源激励作用下,利用抑制振源强度对薄板进行减振的方法,并论证该减振方法的有效性。本文的主要工作内容是：首先,阐述了抑制振源强度这种减振方法。其次,利用薄板受迫振动的动力学方程推导出了受多个振源作用的矩形薄板的总动能。最后,以薄板的总动能为振动的评价指标,分别通过数值分析和实验两种方法,研究了两个振源的位置布置和相位差对薄板振动的影响。研究结果表明：两个振源的位置布置和相位差对薄板振动具有较大的影响,通过振源位置的合理布置和相位差的控制,可以对薄板进行有效的减振。本文提出的通过抑制振源强度的减振方法是有效的。本文的主要贡献在于：(1)对于船舶甲板振动,针对目前减振方法存在的问题,本文提出了抑制振源强度这种减振方法,可以从振源上解决船舶的某些局部振动问题。(2)用数值分析和实验的方法验证了抑制振源强度这种减振方法的有效性。
[Abstract]:Ship deck vibration caused by internal source are the main host, the propeller and the working machine (such as motor, blower and pump etc.). This research is the method of reducing vibration caused by vibration of ship deck working machine. Generally, the ship vibration reduction method is taken to add isolator or dynamic vibration absorber, the two a method of reducing vibration limitation in application is the need for additional equipment, additional energy consumption. Aiming at this problem, this paper presents a method for vibration reduction of ship deck by the method of inhibiting vibration strength, vibration between each other through inhibition, to reduce the ship deck vibration. The vibration reduction methods the advantage is no need to add additional equipment, low cost and energy saving. The goal of this paper is to propose a simply supported rectangular plate in a plurality of excitation source, suppression of vibration strength on the plate by The vibration method, and demonstrate the effectiveness of vibration reduction methods. The main contents of this thesis are: firstly, expounds the suppression of vibration strength of the damping method. Secondly, using the plate dynamics equation of forced vibration of the rectangular plate by a plurality of total kinetic energy source function. Finally, the total kinetic energy of the thin plate the evaluation index of vibration, respectively through numerical analysis and experiments of two kinds of methods, location and phase of the two source of difference effect on thin plate vibration. The results show that: location and phase of the two source of difference has great influence on the vibration control, through reasonable arrangement of source location and phase difference that can be an effective damping of the sheet. This vibration suppression method by vibration strength is effective. The main contribution of this paper is: (1) for ship deck vibration, aiming at The problem of vibration reduction method is put forward. In this paper, a vibration reduction method is proposed, which can restrain vibration source intensity. It can solve some local vibration problems of ship. (2) numerical analysis and experimental methods verify the effectiveness of this method.

【学位授予单位】：华东理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U661.44

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