Headframe resonance is a major cause of large hoist system damage and instability. Therefore, restraining the resonance of a large hoist system headframe is critical for reducing shock and vibrations, thereby maintaining the safety and reliability of the mining equipment. In this study, an approach was developed to restrain the resonance of a large hoist system headframe. A finite element model of a large hoist system headframe was established. Simulations were carried out, and the modal characteristics of the large hoist system headframe were obtained. The results showed that the second- and third-order natural frequencies were both close to 1.5[Formula: see text]Hz. Furthermore, experiments were conducted. An analysis of the experimental and simulation results indicated that a vibrational forcing with a frequency of 1.56[Formula: see text]Hz was a key factor causing resonance of the large hoist system headframe. Moreover, 14 different retrofitting approaches were proposed to change the natural frequencies of the large hoist system headframe, thereby providing resonance restraint. The main retrofitting concept is to add new assembled steel box structures with inner stiffeners between the transverse beams and oblique brackets in the middle area of the large hoist system headframe. In addition, the weight added by the retrofitting approach should be minimized to reduce the construction difficulties and costs. After a comprehensive comparison, an optimal retrofitting design of the 14 retrofitting approaches considered was selected. This optimal retrofitting approach provides guidance for restraining the resonance of large hoist system headframes. Furthermore, this study provides a method for the design of large hoist system headframes and the determination of the vibration characteristics.

中文翻译：

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大型起重系统头架的共振抑制研究

头架共振是大型起重系统损坏和不稳定的主要原因。因此，抑制大型提升系统井架的共振对于减少冲击和振动至关重要，从而保持采矿设备的安全性和可靠性。在这项研究中，开发了一种方法来抑制大型起重机系统头架的共振。建立了大型提升系统头架的有限元模型。进行了仿真，获得了大型提升系统头架的模态特性。结果表明，二阶和三阶固有频率均接近1.5[公式：见正文]Hz。此外，进行了实验。对实验和模拟结果的分析表明，频率为 1.56 的振动强迫[公式：见正文]Hz 是引起大型提升系统头架共振的关键因素。此外，提出了 14 种不同的改造方法来改变大型提升系统顶架的固有频率，从而提供共振抑制。改造的主要理念是在大型提升系统头架中间区域的横梁和斜支架之间增加新的装配式钢箱结构，内部加强筋。此外，应尽量减少改造方法增加的重量，以降低施工难度和成本。经过综合比较，从所考虑的 14 种改造方法中选出了一种最优改造设计。这种最佳改造方法为抑制大型起重系统顶架的共振提供了指导。此外，