特种起重机伸缩臂振动特性建模分析与试验

发布时间：2018-02-22 00:46

本文关键词： 起重机伸缩臂振动特性数学模型试验　出处：《振动与冲击》2016年22期 　论文类型：期刊论文

【摘要】：为研究某新型特种起重机作业过程中伸缩臂带载伸展时的振动特性,将伸缩臂等效为固定支撑的阶梯式变截面悬臂梁和进行伸展运动的变长度悬臂梁。基于梁振动的微分方程与模态叠加理论建立了伸缩臂带载伸展时臂架振动的数学模型。采用Rayleigh-Ritz法,结合梁的边界条件得到了各级臂振动的固有频率和在等效冲击载荷作用下臂端的坐标响应,进而得到振动位移曲线。对理论结果分析可知,伸缩臂的自身臂架结构和伸展速度是影响臂节振动的主要因素,臂节刚度越小、伸展速度越快,臂架振动位移越大。依托改装后的HIAB-033T型起重臂为试验平台进行试验研究,试验结果与理论结果基本一致,验证了理论分析的正确性。
[Abstract]:In order to study the vibration characteristics of a new type of special crane, The telescopic arm is equivalent to a stepped cantilever beam with fixed support and a cantilever beam with variable length for stretching. Based on the differential equation of beam vibration and modal superposition theory, the number of boom vibration with load extension is established. Using Rayleigh-Ritz method, Combined with the boundary conditions of the beam, the natural frequencies of the vibration of each arm and the coordinate response of the arm end under the equivalent impact load are obtained, and then the vibration displacement curve is obtained. The structure and the extension speed of the telescopic arm are the main factors affecting the vibration of the arm joint. The smaller the stiffness of the arm joint, the faster the extension speed, the greater the vibration displacement of the boom. The experimental results are basically consistent with the theoretical results, and the correctness of the theoretical analysis is verified.
【作者单位】：第二炮兵工程大学二系;
【基金】：国家自然科学基金(51505485) 军内科研项目(133053)
【分类号】：TH21

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