Using the hybrid FE-SEA method,the vibration and sound radiation performance of a flat panel were analyzed when applying reinforced ribs and damping material,under a unit force excitation and sound radiation excitation, respectively.The power balance equations of two subsystems were derived according to the statistical energy analysis (SEA)method,and the effects of loss factor variation on the energy transmission between SEA subsystems were studied. The hybrid FE-SEA prediction model of a passenger car was established,and its reliability was verified with tests.The car body panels'vibrations and sound radiation performances were compared and the varying trend of a driver head sound cavity's sound pressure level was predicted when using three different schemes to add damping material.%在分别施加单位力激励和声辐射激励下，使用 FE-SEA 混合法分析了平板在加筋和加阻尼材料时的振动及声辐射性能。根据统计能量法对二子系统的功率平衡方程进行推导，研究了内损耗因子的变化对 SEA 子系统间能量传递的影响；建立了轿车的 FE-SEA 混合预测模型，并通过实验验证了模型的可靠性。使用三种不同的方案添加阻尼材料，对比了车身板件的振动和声辐射性能，预测了驾驶员头部声腔声压级的变化趋势。
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