ժҪ ��ѹ��Ĥ������(SFD,Squeeze Film Dumpers)�����Ч������,Ŀǰ�㷺Ӧ���ں��շ������ȸ�����ת��е��.�ڻ�����ŵ���̵Ķ���н��ƽ����н��ƽ������,�����������ѹ��Ĥ��������ת��֧��ϵͳ��̬�������Ե�����Ԫ��ѹ��Ĥ���㷽��,�÷�������Ч��ģ��ת��ϵͳ�ڸ��ֹ��������µ���Ĥ��ģ��.Ϊ����֤�������۷������,������Ԫ�������˴���ѹ��Ĥ������ת��ϵͳ����Ĥѹ���ֲ�����Ĥ����,�����л���������Ĥ��������Ӱ��.ͨ����ĳ������ת��֧��ϵͳ��ģ�����,�������������жԱȷ���,֤��������ϵͳ�������Լ��㷽�������ܷ�����������ڹ���ʵ��.
SFD(squeeze film dampers) designed to provide proper amounts of damping and stiffness to alleviate the problem of vibration are used extensively in almost all high-speed rotating machines, such as aeroengine. A squeeze film analysis based on finite element method was proposed for solving the steady state dynamic characteristic of the rotor system supported on squeeze film damper and elastic supports, but most closed form solutions of Reynolds’ equation assumed either a short bearing approximation or a long bearing approximation generally. The finite element model of damper was simulated by the variation of geometry within the flow path. In order to validate the results of theoretic analysis, the pressure distribution and equivalent film damping of typical SFD were calculated by using the finite element method. The effects of film inertia forces were also calculated. Comparison of calculational and experimental results show that the analysis and calculation methods and results of the rotor system dynamic characteristic can be used in engineering practice.