摘要
消声器内部压力脉冲是造成辐射噪声的主要原因之一,因此预测内部压力对研究消声器辐射噪声具有意义。采用GT-Power软件建立汽车发动机和消声器一维模型,从而进行仿真分析,预测消声器内部压力时序值;通过Matlab软件DFT变换对其压力时序值进行频谱分析,得到了压力频域值。通过与试验对比,验证了仿真模型预测压力时序值的准确性和预测压力频域值的有效性。
The internal pulse pressure of the muffler is one of the main causes of radiated noise, so predicting internal pressure of the muffler is very important for studying radiated noise. Using GT-Power software, this paper constructs a one-dimensional model of the motor engine and the muffler, which predicts the sequence value of internal pressure of the muffler through simulation. The frequency domain value is obtained by spectrum analyzing the sequence value of the internal pressure of the muffler using Matlab software with DFT. By contrasting the experimental value and the simulative value, the accuracy of the forecast pressure sequence values and the effectiveness of the pressure frequency domain values are verified.
出处
《汽车技术》
北大核心
2013年第6期24-27,共4页
Automobile Technology
基金
武汉市青年晨光科技计划项目(201271031413)
高等学校博士学科点专项科研基金(20120143120002)
关键词
汽车
消声器
内部压力
预测
Vehicle, Muffler, Internal pressure, Predication
