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Dynamic impact experiment and response characteristics analysis for 1:2 reduced-scale model of hydraulic support
International Journal of Mining Science and Technology ( IF 11.8 ) Pub Date : 2021-04-17 , DOI: 10.1016/j.ijmst.2021.03.004
Huaiwei Ren , Desheng Zhang , Shixin Gong , Kai Zhou , Chenyang Xi , Ming He , Tijian Li

It is significant to research the impact resistance properties of hydraulic support due to its key support role in the fully mechanized mining face. However, it is difficult for the entire hydraulic support to implement the impact experiment underground and analyze the response characteristic. Therefore, a dynamic impact experiment for the entire hydraulic support was proposed in this paper, where a 1:2 reduced-scale model of hydraulic support was designed and its response characteristics under dynamic impact load were analyzed. Firstly, a comprehensive monitoring scheme was proposed to achieve an effective monitoring for dynamic response of hydraulic support. Secondly, a multi-scale impact experiment was carried out for the entire hydraulic support and dynamic behaviors of hydraulic support under the multi-scale impact load were revealed by experimental data. Then a dynamic impact experiment of the entire hydraulic support was simulated in ADAMS with the same experiment conditions, and the experimental and simulation data were verified mutually. Finally, the characteristics of energy conversion and dissipation of the entire experiment system after impact were analyzed. The experiment results showed that the impact resistance properties of hydraulic support largely depended on the initial support conditions and different vertical rigidities affected energy distribution proportion of the entire support system.



中文翻译:

1:2液压支架缩比例模型的动态冲击实验和响应特性分析

由于液压支架在综采工作面中的关键支撑作用,因此研究其抗冲击性能具有重要意义。但是,整个液压支架很难在地下进行冲击试验并分析响应特性。因此,本文提出了一种对整个液压支架的动力冲击试验,设计了一种1:2比例缩小的液压支架模型,并分析了其在动态冲击载荷下的响应特性。首先,提出了一种综合监测方案,以实现对液压支架动力响应的有效监测。第二,对整个液压支架进行了多尺度冲击试验,并通过实验数据揭示了多尺度冲击载荷下液压支架的动力学行为。然后在相同的实验条件下,在ADAMS中对整个液压支架的动态冲击实验进行了仿真,并对实验数据和仿真数据进行了相互验证。最后,分析了冲击后整个实验系统的能量转换和耗散特性。实验结果表明,液压支架的抗冲击性能在很大程度上取决于初始支架条件,不同的垂直刚度会影响整个支架系统的能量分配比例。然后在相同的实验条件下,在ADAMS中对整个液压支架的动态冲击实验进行了仿真,并对实验数据和仿真数据进行了相互验证。最后,分析了冲击后整个实验系统的能量转换和耗散特性。实验结果表明,液压支架的抗冲击性能在很大程度上取决于初始支架条件,不同的垂直刚度会影响整个支架系统的能量分配比例。然后在相同的实验条件下,在ADAMS中对整个液压支架的动态冲击实验进行了仿真,并对实验数据和仿真数据进行了相互验证。最后,分析了冲击后整个实验系统的能量转换和耗散特性。实验结果表明,液压支架的抗冲击性能在很大程度上取决于初始支架条件,不同的垂直刚度会影响整个支架系统的能量分配比例。

更新日期:2021-05-14
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