METHOD DETERMINING TRANSFER CHARACTERISTICS OF MEMBERS OF STRUCTURE OF MULTICHANNEL VIBRATION PROTECTING SYSTEM Russian patent published in 2001 - IPC

FIELD: testing and vibration protecting equipment. SUBSTANCE: random vibration actions are formed in working range of frequencies in points of attachment of elastically damping members to platform of vibration bed in multichannel vibration protecting system composed of protected object and elastically damping members linked to it. Values of inherent and mutual spectral densities of accelerations as well as values of mutual spectral densities of reaction of system and vibration actions are measured. System is put on platform of vibration bed capable of inhomogeneous elastic damping properties. Values of inherent and mutual densities of accelerations in points of attachment are set in each frequency band of working range. Random narrow-band signals are formed. Values of inherent and mutual spectral densities of accelerations in points of attachment are measured in each narrow frequency band. Values of all products of complex transfer functions of vibration paths in points of attachment computed in pairs by functions complexly dependent on them are determined by measured values. Values of gain factors of former of random narrow- band signals are found by measured values of inherent and mutual spectral densities of accelerations and by values of all computed products. Values of mutual spectral densities of accelerations in points of joint of elastically damping members and protected object and of accelerations in points of attachment of elastically damping members to platform of vibration bed are measured in each frequency band of working range. Values of complex transfer functions of elastically damping members and values of complex transfer functions of members of structure of protected object located between points of their joint to elastically damping members are found by values of inherent and mutual spectral densities of accelerations set and measured in each frequency band of working range. EFFECT: increased informativity and quality of investigation. 1 dwg