摘要
在应用声传递向量技术对某商用客车的车内噪声进行板件声学贡献分析的基础上,提出了引入特征频率计权系数和场点权重系数确定多特征频率下对车内综合声场声学贡献量最大的关键车身板件的方法。接着采用中心组合设计通过最小二乘拟合建立了以关键板件振速和1阶模态频率为目标,板件与阻尼层厚度为变量的非线性的响应面模型,通过优化确定了变量的最佳组合。优化方案的实车试验结果显示车内噪声改善效果明显。
Acoustic transfer vector technique is applied to an analysis on panel acoustic contribution to the interior noise of a commercial bus.Based on the analysis,a scheme is proposed of introducing weighting coefficients for characteristic frequencies and field points to determine the dominant body panels having the most acoustic contribution to overall interior sound field.Then central composite design and least square fitting are adopted to build a nonlinear response surface model with the vibration velocity of key panels and the 1 st order modal frequency as objective and the thicknesses of panels and damping layers as design variables,and an optimum combination of variables is determined by optimization in the end.The results of real vehicle test with optimized scheme demonstrate an apparent noise improvement effect.
出处
《汽车工程》
EI
CSCD
北大核心
2015年第12期1438-1444,1432,共8页
Automotive Engineering
关键词
车身板件
声学贡献
声传递向量
中心组合设计
响应面模型
优化
vehicle body panel
acoustic contribution
acoustic transfer vector
central composite design
response surface model
optimization
