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Vibration reduction on city buses: Determination of optimal position of engine mounts

机译：减少城市客车的振动：确定发动机支架的最佳位置

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This study is composed of three essential parts. The first part describes an indirect semi-experimental method which is used to reconstruct the excitation force of an operating diesel engine from the acceleration data measured at the mounting points. These internal forces can not be directly measured with force sensors; they have to be derived from the dynamic deformation of the engine support, so a theoretical analysis is carried out to derive the equations for the force re-construction.rnThe second part deals with prevention of low frequency vibration of the powertrain from spreading to the rest of the vehicle. Three uncoupling techniques are used to minimize these vibrations. The first technique reduces the non-diagonal elements of stiffness matrix. The second technique uses the elastic axes decoupling criterion. The third technique uncouple the torque roll axis (TRA) by using the previously determined excitation efforts.rnIn the third part, numerical and experimental results are discussed. The solicitations deducted and the positions of mounts allowing decoupling of the powertrain are presented.
机译：这项研究包括三个基本部分。第一部分描述了一种间接的半实验方法，该方法用于根据在安装点处测得的加速度数据来重建运行中的柴油机的激励力。这些内力不能用力传感器直接测量。它们必须从发动机支架的动态变形中得出，因此进行了理论分析，以得出力重构的方程。第二部分是防止动力总成的低频振动扩散到其余部分。的车辆。三种解耦技术用于最小化这些振动。第一种技术减少了刚度矩阵的非对角元素。第二种技术使用弹性轴解耦准则。第三种技术通过使用先前确定的激励力来解耦扭矩侧倾轴（TRA）。rn在第三部分中，讨论了数值和实验结果。介绍了减少的要求和允许动力总成解耦的安装座位置。

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