In order to improve the working environment of the underframe suspension equipment of rail engineering vehicles,the vibration isolation system needs to be optimized and designed.The article takes the power unit as the specific research object,simplifies it to a rigid body with 6 degrees of freedom,and considers commonly used three-point and four-point elastic suspension methods.Under the premise that the maximum static compression of the rubber at each suspension point does not exceed the limit,and to ensure horizontal installation of equipment,minimizing the difference of rubber compression at each suspension point is taken as the optimization objective,so as to obtain the optimal stiffness allocation at each suspension point,and then obtain the natural frequency of the vibration isolation system and the values of the transmission rate of each vibration mode of the system under the main excitation frequency.In order to facilitate the use and promotion of this method,a visualization platform for optimal suspension stiffness selection is developed based on a language,and the influence law of the suspension frequency of the underframe suspension equipment on its vibration isolation effect is investigated under the platform.
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