冲击载荷作用于掩护梁对液压支架的影响分析
发布时间：2019-04-30 15:16
【摘要】：为研究液压支架掩护梁受到冲击载荷之后对支架运动趋势、受力状态以及掩护梁结构的影响,利用多体动力学分析软件ADAMS建立支架的数值仿真模型。模型中掩护梁通过Hypermesh前处理软件进行柔性化设置,立柱与平衡千斤顶由弹簧阻尼系统等效替代,其中立柱刚度设置为变刚度,支架初撑力由立柱等效弹簧预载荷提供,顶板压力采用某静载荷垂直施加于顶板上方,直接顶和基本顶岩块垮塌砸落于掩护梁所产生的冲击载荷由某阶跃载荷进行模拟。基于上述模型,分析了冲击载荷作用于掩护梁不同位置时,顶梁水平前移变化、顶梁与顶板接触力变化、各处铰接点力变化以及掩护梁应力变化,结果表明,载荷作用位置不同所引起支架的各种变化趋势也不同。这可以对支架的稳定性控制和结构强度设计提供参考。
[Abstract]:In order to study the influence of the shield beam of the hydraulic support on the movement trend, the stress state and the structure of the shield beam, the numerical simulation model of the support was established by using the multi-body dynamic analysis software ADAMS. In the model, the shield beam is flexible set by Hypermesh pre-processing software, the column and the balance Jack are replaced by the spring damping system, in which the stiffness of the column is set to variable stiffness, and the initial support force is provided by the equivalent spring preload of the column. The roof pressure is applied vertically above the roof by a static load, and the impact load caused by the collapse of the direct roof and the basic roof rock mass on the cover beam is simulated by a step load. Based on the above-mentioned model, the horizontal forward change of top beam, the change of contact force between top beam and roof, the change of hinge point force and the change of stress of shield beam are analyzed when the impact load acts on different positions of shield beam. The results show that: The change trend of the support caused by different loading positions is also different. This can provide a reference for the stability control and structural strength design of the support.
【作者单位】： 山东科技大学机械电子工程学院;
【基金】：国家自然科学基金项目资助项目(51674155) 山东省自然科学基金资助项目(ZR2014EEM021) 山东省科技发展计划课题资助项目(2014GGX103043)
【分类号】：TD355.4
本文编号：2468845
[Abstract]:In order to study the influence of the shield beam of the hydraulic support on the movement trend, the stress state and the structure of the shield beam, the numerical simulation model of the support was established by using the multi-body dynamic analysis software ADAMS. In the model, the shield beam is flexible set by Hypermesh pre-processing software, the column and the balance Jack are replaced by the spring damping system, in which the stiffness of the column is set to variable stiffness, and the initial support force is provided by the equivalent spring preload of the column. The roof pressure is applied vertically above the roof by a static load, and the impact load caused by the collapse of the direct roof and the basic roof rock mass on the cover beam is simulated by a step load. Based on the above-mentioned model, the horizontal forward change of top beam, the change of contact force between top beam and roof, the change of hinge point force and the change of stress of shield beam are analyzed when the impact load acts on different positions of shield beam. The results show that: The change trend of the support caused by different loading positions is also different. This can provide a reference for the stability control and structural strength design of the support.
【作者单位】： 山东科技大学机械电子工程学院;
【基金】：国家自然科学基金项目资助项目(51674155) 山东省自然科学基金资助项目(ZR2014EEM021) 山东省科技发展计划课题资助项目(2014GGX103043)
【分类号】：TD355.4
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