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This study is a systematic investigation of the body mounts' dynamic characteristics in component, sub-system and full system levels and its application in the frontal impact analysis of a body-on-frame (BOF) vehicle. Concluded from the component study, the body mount is modeled by non-linear spring with built-in damage and rupture properties. The sub-system study reveals the importance of modeling the interaction between the body mount and its surrounding structure. A general-purpose interaction modeling is developed to provide a realistic CAE simulation of this interaction behavior. The full system is mainly for methodology validation. Four 90-degree frontal and the one IIHS offset frontal crash tests are used to evaluate the performance of the body mount in low and high speeds and its capability of predicting the body mount and the floor pan failures.

This study summarizes the latest development of the methodologies for testing and CAE modeling of the engine mount. A systematic approach is used in this study with detailed component, subsystem and full system level investigations. The component level study reveals the entangling phenomenon of the inertial and rate effects in the engine mount dynamic characteristics. In the subsystem, the interaction between the engine mount and its surrounding structure is explored. The full system study is primarily used to validate the CAE methodology for engine mounts developed in the component and subsystem level studies. Four full vehicle barrier crash tests, with different crash modes and speeds, are employed in this validation phase to evaluate the performance of the engine mount CAE methodology.