虚拟激励法及其在汽车随机振动应用中的探讨
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摘要
论述了虚拟激励法,为探讨其应用于汽车随机振动的可行性,构造了虚拟路面激励。以1/4汽车单自由度振动系统为对象,由虚拟激励法推导出系统和振动响应量的频率响应特性,提出了求取系统振动响应量功率谱密度的新方法,给出了应用虚拟激励法求解汽车随机振动的计算实例。结果表明,虚拟激励法是比傅里叶分析方法更为简便的时频研究方法。
This paper discusses vitual excitation method and constructs vitual road excitation for discussing the feasibility of this method applied to automotive random vibration.According to one quarter freedom model of automobile,the frequency-response characteristics of the system and system vibration responses are deduced based on vitual excitation method,a new method is put forward for calculating power spectrum density of system vibration responses,and an example is given for automotive random vibration.The results show that vitual excitation method is a more simple research method in comparison with Fourier analysis method.
This paper discusses vitual excitation method and constructs vitual road excitation for discussing the feasibility of this method applied to automotive random vibration.According to one quarter freedom model of automobile,the frequency-response characteristics of the system and system vibration responses are deduced based on vitual excitation method,a new method is put forward for calculating power spectrum density of system vibration responses,and an example is given for automotive random vibration.The results show that vitual excitation method is a more simple research method in comparison with Fourier analysis method.
引文
1林家浩等.随机振动的虚拟激励法.北京:科学出版社,2004
2陈健云等.拱坝-地基体系的多点输入虚拟激励法及随机响应分析.上海力学,1999,20(1):76～81.
3刘高等.基于虚拟激励法的大跨桥梁抖振内力分析.计算力学学报,2003,20(6):649～654.
4樊振江.机械振动及其计算机辅助测试技术.北京:机械工业出版社,1996.
5庄表中等.随机振动概论.北京:地震出版社,1982.
6余志生.汽车理论.北京:机械工业出版社,1992.
2陈健云等.拱坝-地基体系的多点输入虚拟激励法及随机响应分析.上海力学,1999,20(1):76～81.
3刘高等.基于虚拟激励法的大跨桥梁抖振内力分析.计算力学学报,2003,20(6):649～654.
4樊振江.机械振动及其计算机辅助测试技术.北京:机械工业出版社,1996.
5庄表中等.随机振动概论.北京:地震出版社,1982.
6余志生.汽车理论.北京:机械工业出版社,1992.
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