练

We could judge if it is resonant by the way of analyzing the car body, side wall, wagon top and inner decorations under reasonable cyclic exciting load. Sequentially, we can improve the construction of vehicle and inner decorations and ameliorate the amenity and prolong fatigue lifetime, then give a reasonable betterment project.

利用合适的周期激扰对车体施加载荷，可以分析在这些激励下车体、侧墙、车顶以及内饰件的响应，是否有可能形成共振，从而如何改进车体避开共振的可能及其内饰件的结构，提高乘坐的舒适性和结构的疲劳寿命，给出对车体的合理改善方案。

It may be noted that the gain falls to zero at a frequency of the order of 1MHz.

它可能需要指出的是，增益下降到零频率的顺序为1MHz 。