发动机动力总成悬置系统模态分析与优化

悬置系统设计的核心是合理设计悬置元件的位置、角度和刚度,以提高悬置系统各向谐振模态解耦度,并使各向自振频率分别避开发动机怠速频率、车架、车身各向自振频率等,从而提高悬置系统的隔振效果。在悬置系统模态分析的基础上,建立了以提高悬置系统解耦度和各向谐振频率尽可能接近期望值为目标的悬置系统自动优化设计数学模型,并以某发动机动力总成悬置系统为应用案例,对其悬置元件的位置、角度和刚度进行自动优化设计计算,获得了预期的优化效果。

Modal Analysis and Optimization of an Engine Powertrain Mounting System

The core of mounting system design is to design the stiffness, position, and angle of mounting components reasonably, in order to improve each resonant modal deeoupling degrees of the mounting system, and make the natural frequency of vibration kept away from the engine＇s modal frequency, car-frame, bodywork, etc., and then improve the effect of vibration isolation of suspension system. Based on the modal analysis of suspension system, this text set up the mathematical model for optimal design of mounting system automatically with the aim of improving the decoupling degree of mounting system and the modal frequency as close as possible to expectations, and took a certain engine powertrain mounting system for application case , doing the automatic optimization design and calculation for its mounting components ＇ stiffness, position, and angle location and attaining the expected effect of optimization.