Chatter is a self-excited vibration that can occur during milling operations causing undesirable consequences such as poor surface finish and increased levels of tool wear. One possible solution to this problem is to optimise the dynamics of the machine by tuning parameters such as tool stickout length, e.g. by using receptance coupling substructure analysis. Unfortunately, experimental limitations of the method, such as the requirement to model interface dynamics and the inefficient optimisation process, have hindered its advancement to the industrial sector.

This paper looks to resolve these issues by proposing a new structural modification method for chatter avoidance. Firstly, tool-holder diameter is investigated as a potential tuning parameter: a new experimental dataset demonstrates that this design parameter can have a significant and valuable impact on the chatter stability. Secondly, the direct structural modification method is introduced, allowing the tool-holder diameter to be modelled without any knowledge of the interface behaviour between tool and tool-holder. Thirdly, the inverse structural modification method is proposed, allowing tuning and stability optimisation by solving a single equation. Lastly, a new tunable-mass tool-holder is presented, allowing the dynamics of a milling machine to be tuned for each tool diameter and length range with a single tool-holder. This eliminates the need for manufacturers to purchase a wide range of tool-holders, a significant financial investment.

颤振是一种自激振动，可能会在铣削过程中发生，从而导致不良后果，例如不良的表面光洁度和增加的刀具磨损水平。该问题的一种可能的解决方案是通过调整参数（例如，使用接收耦合子结构分析）来优化机床的动力，例如调整工具的伸出长度。不幸的是，该方法的实验局限性，例如对接口动力学建模的要求和效率低下的优化过程，阻碍了其向工业领域的发展。

本文旨在通过提出一种新的避免颤动的结构修改方法来解决这些问题。首先，将刀架直径作为潜在的调整参数进行研究：一个新的实验数据集表明，该设计参数可能会对颤振稳定性产生重大而宝贵的影响。其次，引入了直接的结构修改方法，该方法允许在不了解刀具与刀架之间的界面行为的情况下对刀架直径进行建模。第三，提出了一种逆向结构修正方法，通过求解一个方程，可以进行调谐和稳定性优化。最后，提出了一种新的可调质量刀架，允许使用单个刀架针对每个刀具直径和长度范围调整铣床的动力学特性。