基于多场耦合建模的发动机半主动悬置参数识别

摘要

In view of the difficulty in accurately setting up multi-field coupling model for the optimization of semi-active mount, ADINA software is adopted to establish a liquid-solid-gas three-phase coupling simulation model for semi-active engine mount, and a lumped parameter model for semi-active mount is also acquired by accurate i-dentification and extraction of key parameters, with its dynamic characteristics studied. The results show that the ADINA-based liquid-solid-gas three-phase coupling simulation model can rapidly and accurately extract the key pa-rameters in lumped parameter model, realizing the accurate prediction on the dynamic characteristics of semi-active mount. The correctness of multi-field coupling modeling and dynamic characteristics analysis method are verified by tests , providing a feasible scheme for the forward development and structure optimization of the semi-active mount of automotive engine.%针对半主动悬置优化中存在的多场耦合精确建模的难题,采用ADINA软件,建立了半主动悬置液固气三相耦合仿真模型,通过关键参数的辨识和准确提取,获得了半主动悬置的集总参数模型,并研究了其动特性.结果表明:基于ADINA的液固气三相耦合仿真模型,能快速、准确提取集总参数模型的关键参数,实现半主动悬置动特性的准确预测.通过试验验证了多场耦合建模和动特性分析方法的正确性,为汽车发动机半主动悬置的正向开发与结构优化提供了可行的方法.