从简单的悬臂梁入手,建立了柴油机上滚动轴承的动力学模型,从理论上推导了梁上各点位移、速度、加速度和应变的响应解析表达式。通过仿真计算,发现上述四种参数对激振力都很敏感,而相对于其它三种响应而言,应变响应对其它激振源的加速度信号不敏感,得出了利用应变信号可以有效地避免柴油机上其它振动源的干扰的结论。并通过试验研究,验证了上述结论。 Starting from a simple cantilever beam, the dynamic model of the rolling bearing on a diesel engine is established, and the analytic expression of displacement, velocity, acceleration and strain at each point of the beam is derived theoretically. Through the simulation calculation, it is found that the above four parameters are very sensitive to the exciting force. Compared with the other three kinds of response, the strain response is insensitive to the acceleration signals of other excitation sources. It is concluded that the strain signal can be effectively avoided Conclusion of interference from other vibration sources on diesel engines. And through experimental research, verify the above conclusion.