拖拉机整车系统声固耦合噪声响应分析

建立了拖拉机驾驶室内部噪声随机响应的声固耦合模型，利用该模型计算了驾驶室内部噪声的随机响应，经ＭＴＳ振台上的道路模拟试验表明，计算结果和试验结果吻合较好。把此模型和文献１中计算发动机振动引起的室内噪声模型结合在一起，对拖拉机在实际工况下的室内噪声进行了分析计算和试验，获得了较满意的结果。利用上述方法，在拖拉机产品设计阶段就能对其声学性能进行分析和修改，改变了以往要等样机制造出来之后才能对其声学性能进行分析的传统做法，使拖拉机驾驶室的动态择优声学设计成为可能。

THE COUPLED STRUCTURAL-ACOUSTIC NOISE RESPONSE ANALYSIS OF WHOLE TRACTOR SYSTEM

In this paper,a coupked structural- acoustic finite element model of random responses ofnoises in a tractor cab is established. Random responses of the interior noises are computedaccording to this model.A good agreement is shown by comparing the predicted results withthe measured ones which are obtained by road simulation test on MTS road simulator,Fur-thermore,by means of the methods in this paper and reference l,interior noises in practicalworking condition of the tractor are computed and measured ,the results are satisfactorythrough comparison. By the aid of the above method,acoustical performances of wheeledtractors can be analyzed and modified in their product design stage.It improves the past tra-ditional methods that acoustical performances of tractors were not able to be analyzed until aprototype tractor was made, The above theoretical analysis method makes it possible to real-ize the dynamic optimization acoustics design of the wheeled tractors.