轴向运动梁受移动载荷作用的横向动力响应

罗炳华;高跃飞;刘荣华;贾强

振动与冲击 ›› 2011, Vol. 30 ›› Issue (12) : 59-63.

PDF(1442 KB)
PDF(1442 KB)
振动与冲击 ›› 2011, Vol. 30 ›› Issue (12) : 59-63.
论文

轴向运动梁受移动载荷作用的横向动力响应

  • 罗炳华;高跃飞;刘荣华;贾强
作者信息 +

A study on lateral dynamic response of an axially moving beam under a moving load

  • LUO Bing-hua, GAO Yue-fei, LIU Rong-hua, Zhao Peng
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文章历史 +

摘要

建立了轴向运动梁受移动载荷作用的有限元模型,提出了描述运动梁节点约束状态的节点生死方法。该方法使得单元数目及长度固定不变,节点的参数在不同时间步下无缝传递,克服了采用单元数目或长度改变的方法引起的精度不足的缺点。最后利用该方法建立了火炮在两种发射方式下的有限元动力学模型,计算其炮口点横向动力响应,并和采用以往算法的结果进行比较,表明用该方法计算的结果比较符合实际工况。

Abstract

A finite element model of an axially moving beam under a moving load was established, and a method called node’s life and death was put forward to describe the state of nodes on a moving beam. This method let the number and length of the elements on the model to be constant, the parameters of nodes under different time steps transfer with less error, and thus it overcomes the shortcomings leaded by methods that change the number or length of elements. Finally, finite element dynamic model of gun firing in two different ways was established by this method and lateral dynamic response of muzzle points were calculated. Compared with previous algorithm, the result shows this method more in line with the actual condition.

关键词

轴向运动梁 / 移动载荷 / 动态响应 / 有限元法

Key words

axially moving beam / moving load / dynamic response / finite element method

引用本文

导出引用
罗炳华;高跃飞;刘荣华;贾强. 轴向运动梁受移动载荷作用的横向动力响应[J]. 振动与冲击, 2011, 30(12): 59-63
LUO Bing-hua;GAO Yue-fei;LIU Rong-hua;Zhao Peng. A study on lateral dynamic response of an axially moving beam under a moving load[J]. Journal of Vibration and Shock, 2011, 30(12): 59-63

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