| 摘要 |
PROBLEM TO BE SOLVED: To effectively reduce noise heard by occupants in a cabin while suppressing the weight increase of a body. SOLUTION: Rear ends 10A, 12A of under members 10, 12 are connected to a second rear floor cross member 46, and vibration input points A from a rear suspension is set close to connection parts of rear side members 40, 42 to the second rear floor cross member 46. The vertical vibration resonance frequency of a front body skeleton 62 on the front side of a vehicle from vibration center points P existing in front of the vibration input points A, and the vertical vibration resonance frequency of a body skeleton 64 on the rear side of the vehicle from the vibrational center points P are set to almost the same frequency and set to the frequency distant from the vertical vibration resonance frequency of the rear suspension 52.
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