Abstract
Improvement of the quiet performance of the car is an important factor for comfortableness. In particular, Running vibration influences ride quality. There are two solutions of this kind of vibration. These are vibration damping effect by damping material and vibration suppression because of stiffness enhancement by structural material. On the one hand, reduction in weight of vehicle is also required from the point of view of the environmental performance. For this reason, damping and structural materials shouldn't be used more than necessary. Appropriate material arrangement becomes important. At Mazda Motor Corporation the body structure which makes the vibration attenuation effect maximize has been developed without sacrificing quiet performance and road holding ability by the body weight saving. Propagation of vibration to compartment of the car is suppressed by using damping frame structure which consists of damping and structural materials. The weight saving, usability enhancement, noise and vibration reduction effect are made possible by damping frame structure. The purpose of this study was to build Multi-material topology optimization of damping and structural materials for improvement of vibration suppression effect.
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