The fluid-solid coupling FEM of hydraulic mount for vehicle engine was introduced and the dynamic response of hydraulic mount was simulated. By the simulated result of mount time-domain transient response, the dynamic performance of hydraulic mounts was calculated. During the course of calculation, the disagreement of coordinate system between fluid and structural dynamics was solved by transforming coordinate with the ALE method. The estimation or measurement of fluid damping for hydraulic mount was not necessary and the measurement of volume stiffness for main rubber spring was also necessary. By the calculation, the time-domain dynamic response of mount could be acquired and the simulation results agreed with the test results.%介绍了车载发动机液力悬置流固耦合的有限元分析法,模拟了液力悬置的动态响应.通过瞬态时域响应的模拟结果,计算了液力悬置的动态性能.在计算过程中使用ALE方法进行坐标变换,有效解决了流体力学和结构动力学在坐标系上的不一致问题.计算过程无须估算或测试液力悬置的流体阻尼,无须测量橡胶主簧的体积刚度,可以得到液力悬置在时域内的动态响应,仿真结果与试验测试结果吻合较好.
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