Dynamic Analysis of High-speed Planar Cam Mechanisms Based on Finite-element Method
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摘要: 基于有限元法,建立了凸轮机构的动力学模型。对该模型进行了运动学分析、并依据Kane方程建立了高速凸轮机构柔性构件的模态坐标下的动力学方程。利用该模型及模态坐标与物理坐标的转换关系,对某织机凸轮开口装置L形摆杆进行动力学仿真研究。计算得到的摆杆末端位移、速度和加速度响应曲线表明,有限元法是进行高速凸轮机构分析,尤其是非直杆和形状复杂从动件的高速凸轮机构动力学分析的一种有效方法。Abstract: The dynamic model of cam mechanisms is established according to finite-element method. Kinematic analyses of this dynamic model are obtained. Furthermore, the dynamic equations of cam mechanisms with flexible members are established in modal-coordinates based on Kane's equations. With the dynamic equations and the transformation between modal coordinates and physical coordinates, the dynamic simulation for L-shaped swing rod in a cam loom is finished. Calculated displacement, velocity and acceleration response curves of the end of the swing rod show that the finite-element method is an effective procedure for the dynamic analysis of high-speed cam mechanisms, especially for the high-speed cam mechanisms with non-straight bar and complex shape followers.
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Key words:
- high-speed cam /
- swing rod /
- finite-element method /
- modality
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[1] 张策.机械动力学[M].北京:高等教育出版社,2008 [2] 阮晓光,蔡安江.高速凸轮机构输出端运动规律的确定[J].机械设计与制造,2005,(1):61～63 [3] 张春红.高速凸轮机构的动态设计[J].机械工程与自动化,2006,(2):143～151 [4] 杨明轩.高速凸轮机构动力学模型研究[J].设计与研究,2007,34(7):21～24 [5] 金国光.带有大型伸展机构航天器的柔性多体动力学分析研究[D].天津:天津大学,2000 [6] Huston R L.Multibody dynamics including the effects of flexibility and compliance[J].Computer and Structurals,1981,14(5-6):443～451 [7] 蒋玉川,张建海,李章政.弹性力学与有限元法[M].北京:科学出版社,2006 [8] 张劲夫,秦卫阳.高等动力学[M].北京:科学出版社,2004 [9] 张劲夫,张俊龙.偏心凸轮机构动力学的一种新模型及其计算[J].中国机械工程,2010,21(7):535～539 -
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