长距离大运量带式输送机机头架的模态仿真

为真实有效地反映长距离大运量带式输送机机头架的整体性能,更方便地设计输送机机头架,对机头架进行了模态仿真.运用模态分析理论和ANSYS软件对机头架建立了有限元模型,并仿真分析研究了机头架前6阶的固有频率和振型图.结果表明,在不同固有频率下,机头架结构出现立柱振动变形、横梁振动变形和斜撑处振动变形,为保证机头架系统的安全性,应避免受到接近35⁴5 Hz和接近66 Hz载荷的作用.研究结果为整个带式输送机机头架系统的动态特性分析提供了重要参考,同时也为结构的设计和优化提供了理论依据.

Modal analysis on head frame of high-transportation and long-distance belt conveyor

In order truly and effectively to reflect the overall performance of a long-distance head frame of a large - capacity belt conveyor, and more conveniently to design the head frame of the conveyor, the simulation research is carried out on the head frame mode. Through the modal analysis theory, a finite element model of head frame is established by ANSYS software. The first 6 natural frequencies and the mode] shapes of the head frame show that the head frame upright pillar, the connection between the middle crossbeam and the inclined pillar could be destroyed by vibrations. The head frame should be protected from the load of 35 -45 Hz and close to 66 Hz for its safety. The results of this study effectively reflect the overall performance of the conveyor frame and provide both an important reference for the system dynamic-characteristics analysis of the entire head frame of a belt conveyor and a theoretical basis for the design and optimization of the structure.