Device for acoustic insulation in noise generation region e.g. rail wheel, has permanent magnets that are appropriately provided at different positions, and whose dimensions are set to be different

摘要

The device has synthetic resin material, reinforced fiber material, permanent self-lubrication material and permanent magnets. The dimensions of permanent magnets are set to be different. The permanent magnets are appropriately provided at different positions. The reinforced fiber material is selected from carbon fiber, glass fiber or aramid fiber.