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Modal Analysis and Dynamic Modification of Rear Frame for Grader
Author(s): 
Pages: 59-62
Year: Issue:  1
Journal: Vehicle & Power Technology

Keyword:  平地机后机架模态分析动力修改;
Abstract: 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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