| 平地机后机架模态分析及动力修改 |
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| 引用本文： | 吕辉,朱茂桃.平地机后机架模态分析及动力修改[J].车辆与动力技术,2013(1):59-62. |
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| 作者姓名： | 吕辉 朱茂桃 |
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| 作者单位： | 江苏大学汽车与交通工程学院,镇江,212013;江苏大学汽车与交通工程学院,镇江,212013 |
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| 摘 要： | 在ANSYS软件中建立某平地机后机架有限元模型,利用软件中的Block Lanczos法进行理论模态分析,并与模态试验进行对比,从而验证了模型的可靠性.为减小理论模态分析与试验模态分析结果的误差,把弹性模量作为修改参数,对有限元模型进行动力修改.分析结果表明:修改后合理的弹性模量为193 GPa,各阶模态下固有频率计算值与试验值的误差均低于1%.后机架有限元模型经过动力修改后的仿真准确度明显提高,更好地反映结构动态特性,适合做更多的理论分析.
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| 关 键 词： | 平地机 后机架 模态分析 动力修改 |
Modal Analysis and Dynamic Modification of Rear Frame for Grader |
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| LV Hui
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ZHU Mao-tao.Modal Analysis and Dynamic Modification of Rear Frame for Grader[J].Vehicle & Power Technology,2013(1):59-62. |
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| Authors: | LV Hui ZHU Mao-tao |
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| Affiliation: | (School of Traffic and Automotive Engineering,Jiangsu University,Zhenjiang 212013,China) |
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| Abstract: | A finite element model for the rear frame of a grader was established using ANSYS, and itstheoretical modal analyses were conducted using the method of Block Lanczos. Contrasting the results of modal tests and theoretical analyses, the finite element model was verified. Elastic modulus was chosenas modified parameter and the finite element model was modified dynamically. The results showed that the finite element model was able to reflect the structural dynamic characteristics accurately after dynamicmodification. |
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| Keywords: | grader rear frame modal analysis dynamic modification |
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