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Hard rock road-header damping design method based on multi-tuning mass damper

A technique for tuning mass damping, hard rock roadheaders, used in computer-aided design, design optimization/simulation, instrumentation, etc.

Active Publication Date: 2017-12-15
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no public literature on research on vibration reduction of hard rock roadheaders based on multi-tuned mass dampers.

Method used

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  • Hard rock road-header damping design method based on multi-tuning mass damper
  • Hard rock road-header damping design method based on multi-tuning mass damper
  • Hard rock road-header damping design method based on multi-tuning mass damper

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Experimental program
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Embodiment

[0034] Such as figure 1 As shown, the main large parts of the open main beam hard rock tunneling machine of this embodiment include: cutter head, gear box, bottom shield, top shield, left shield, right shield, main beam assembly, saddle frame , support cylinder body, support cylinder left piston rod, support cylinder right piston rod, left support shoe and right support shoe, etc. The main structural parameters are: total mass 135t, cutter head diameter 4m, main engine length 10m, pinion number 8, disc hob number 24, knife spacing 84mm, hob diameter 432mm, hob blade width 9.2mm.

[0035] According to the design method for vibration reduction of hard rock roadheader based on multi-tuned mass dampers in this embodiment, the multi-tuned mass dampers are arranged on the gear box of hard rock roadheader, and the specific steps are as follows:

[0036] (1) According to figure 1 The schematic diagram of the structure of the open main beam hard rock roadheader is shown, and the thre...

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Abstract

The invention provides a hard rock road-header damping design method based on a multi-tuning mass damper. The hard rock road-header damping design method comprises the steps of establishing a hard rock road-header whole-machine rigid-flexible coupling multi-body dynamics model; 2, calculating hob dynamic rock breaking force and shield-surrounding rock mutual acting force and simulating hard rock road-header vibration exciting force; 3, analyzing and evaluating hard rock road-header driving performance and the whole-machine vibration level; 4, installing the multi-tuning mass damper on a hard rock road-header gearbox; 5, determining the quantity, distribution mode, mass, rigidity and damping of damper bodies in the multi-tuning mass damper by minimizing a minimal whole-machine vibration level index value or a maximal whole-machine vibration level index value of a minimal driving performance index. By arranging the multi-tuning mass damper on the hard rock driving gearbox and optimizing parameters of the multi-tuning mass damper, on the basis of improving or maintaining the hard rock road-header driving performance, the whole-machine vibration can be effectively lowered, and the damage to key parts caused by strong vibration can be avoided or lowered.

Description

technical field [0001] The invention relates to a vibration reduction design method for a hard rock roadheader, in particular to a vibration reduction design method for a hard rock roadheader based on a multi-tuned mass damper. Background technique [0002] The hard rock roadheader vibrates violently during the excavation process, which can easily lead to premature damage and failure of key components and structures, such as hob wear, cutterhead bolt loosening and fracture, cutterhead cracking, reducer gear chipping, main bearing damage, etc. , increasing construction costs. Previous studies have shown that dynamic rock breaking increases the fracture toughness of rock, and a large amount of energy is dissipated from the hob-rock interface through incident wave and reflected wave transmission. Therefore, from the perspective of energy efficiency, the vibration will cause the performance of the hard rock roadheader to decline, which is not conducive to rock breaking. Moreov...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/20G06F2119/06
Inventor 邹晓阳郑辉米永振梁利闯
Owner SHANGHAI JIAO TONG UNIV
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