利用实验测试与数值分析对柴油发电机控制箱内电子元器件振动故障进行研究。测试结果表明机组正常运转阶段控制箱关键点产生的振动较为平稳，无振动过载现象。据此推测控制箱内仪表故障的强烈振动主要发生于启动、停机阶段。利用Ansys有限元分析对机组0~50 Hz范围振型进行计算。结果表明机组多阶振型频率处于0~50Hz范围，其中三个振型给控制箱造成较大的振动位移，相应的振动加速度远大于重力加速度，可能造成了严重的过载。过载力完全可能导致控制箱内仪器、仪表引脚连接失效。最后指出动力机械控制元件抗过载能力必须加以考虑。

Electronic components vibration fault in control box of diesel generator was analyzed by experimental test and numerical simulation. Experimental results show out that the key point vibration amplitude of control box is small when the diesel generator works on its normal rotational speed, there isn’t overload. So the strong vibration which induced fault may happen during diesel generator starting or shutdown. Then finite element model of vibration was established by Ansys to calculate model shape of frequency range in 0~50Hz. Studies show that several modal shape frequencies are in the range of 0~50 Hz, three sympathetic vibration of control box happened and displacements are larger then experimental test. Corresponding accelerations are also much larger then gravity acceleration, maybe induce serious overload. So connecting pins of electronic components may be tore by the overload force. After analyzing, it can be concluded that the anti-overload ability of electronic components must be taken into account.