Part mass separated from carbody

摘要

According to the invention, the natural frequency of a carbody of a railway vehicle is increased by separating a part mass dynamically from the carbody. By said separation, the natural frequency of the carbody increases, since the separated mass does not load the carbody dynamically. The separation of a part mass is achieved by suspending the part mass resiliently from the carbody. The stiff-body frequency of the part mass may be tuned in relation to the natural frequency of the main mass of the carbody, such that two natural frequencies are imparted to the cooperating system comprising the main mass of the carbody and its separated part mass, whereby the part mass oscillates most at a lower and the carbody with its main mass oscillates most at a higher frequency.