The present disclosure provides a vibration exciting system and an apparatus for testing an aero-engine rotor, relating to the field of aero-engines, to improve the universality of the vibration exciting system. The vibration exciting system comprises a mounting ring, fixing parts, holders, guide rails, and nozzle assemblies. The mounting ring is configured to be annular; one ends of the fixing parts are fixedly connected to the mounting ring; the holders are slidably mounted at the other ends of the fixing parts, the plurality of holders being arranged circumferentially of the mounting ring; each guide rail connects two adjacent holders, connection positions of the guide rail and the holders being adjustable; and the nozzle assemblies are mounted on the holders. The radius size of a spraying area enclosed by the nozzle assemblies is adjusted by adjusting the positions of the holders on the fixing parts.

The present invention discloses a non-contact dynamic strain field measuring method and system for a rotating blade. The method includes the following steps: establishing a three-dimensional finite element model of a to-be-measured rotating blade, and extracting modal parameters of the three-dimensional finite element model; determining the number and axial mounting positions of blade tip timing sensors; constructing a conversion matrix of finite measuring point displacement and an overall strain field; and acquiring blade tip finite position displacement of the rotating blade based on the blade tip timing sensors, and acquiring, by a dynamic strain, dynamic strains of the rotating blade at any moment, on any position and in any direction based on modal processing of the conversion matrix.

A vibration-centrifugation composite test apparatus and a control method thereof, the apparatus comprises: a centrifuge, an air-cooled electric vibration table and a control electrical cabinet the air-cooled electric vibration table comprises a vibration table main machine and a fan; a central axis of the moving coil in the vibration table main machine is on the same straight line as a horizontal center line of the rotation arm in the centrifuge; the fan is a horizontal fan and disposed above the center of the rotation arm, and a fan cover cabinet is mounted outside the horizontal fan; the control electrical cabinet is mounted above the fan cover cabinet, a power supply line of the control electrical cabinet is connected to a power supply through the conductive slip ring, and a vibration feedback signal line of the vibration table main machine is directly connected to the control electrical cabinet.

The present invention belongs to the technical field of oil field drilling, and relates to a ground testing device for a stabilized platform of a rotary steerable drilling tool. The ground testing device includes: a first supporting member and a second supporting member that are oppositely arranged, where the second supporting member is provided with a first mounting hole; a drill collar and a drill collar motor mounted outside the first supporting member, where a motor shaft of the drill collar motor penetrates the first supporting member and is connected to the drill collar, and a stabilized platform mounting assembly is arranged inside the drill collar; and a first vibration member connected to the drill collar and a second vibration member arranged in the first mounting hole in a sleeved manner, where an elastic member is arranged between the second vibration member and the second supporting member, and the elastic member is arranged on the second vibration member in a sleeving manner. An end portion of the first vibration member is provided with first vibration teeth, an end portion of the second vibration member is provided with second vibration teeth matching the first vibration teeth, and the second vibration member is provided with a first stop member which matches a second stop member arranged in the first mounting hole. According to the present invention, vibration, interference loading, and high-temperature simulation can be performed, and ground tests of different types of mechanical stabilized platforms are achieved.

A dynamic characteristic measurement device of the present invention includes magnetic force generators (1a, 1b, 2a, 2b) arranged on the back surface side of impellers (4, 5), the magnetic force generators that oscillate the impellers (4, 5) with magnetic force, an oscillation controller (12) that drives these magnetic force generators, and vibration sensors (13, 14) that detect vibration of a rotation shaft (3). The dynamic characteristic measurement device further includes an arithmetic device (16) that calculates a dynamic characteristic of a rotor (6) by implementing a frequency analysis and a mode analysis based on an oscillation signal from the oscillation controller (12) and a vibration signal from the vibration sensors (13, 14).

The present invention belongs to the technical field of oil field drilling, and relates to a ground testing device for a stabilized platform of a rotary steerable drilling tool. The ground testing device includes: a first supporting member and a second supporting member that are oppositely arranged, where the second supporting member is provided with a first mounting hole; a drill collar and a drill collar motor mounted outside the first supporting member, where a motor shaft of the drill collar motor penetrates the first supporting member and is connected to the drill collar, and a stabilized platform mounting assembly is arranged inside the drill collar; and a first vibration member connected to the drill collar and a second vibration member arranged in the first mounting hole in a sleeved manner, where an elastic member is arranged between the second vibration member and the second supporting member, and the elastic member is arranged on the second vibration member in a sleeving manner. An end portion of the first vibration member is provided with first vibration teeth, an end portion of the second vibration member is provided with second vibration teeth matching the first vibration teeth, and the second vibration member is provided with a first stop member which matches a second stop member arranged in the first mounting hole. According to the present invention, vibration, interference loading, and high-temperature simulation can be performed, and ground tests of different types of mechanical stabilized platforms are achieved.

The present invention discloses a non-contact dynamic strain field measuring method and system for a rotating blade. The method includes the following steps: establishing a three-dimensional finite element model of a to-be-measured rotating blade, and extracting modal parameters of the three-dimensional finite element model; determining the number and axial mounting positions of blade tip timing sensors; constructing a conversion matrix of finite measuring point displacement and an overall strain field; and acquiring blade tip finite position displacement of the rotating blade based on the blade tip timing sensors, and acquiring, by a dynamic strain, dynamic strains of the rotating blade at any moment, on any position and in any direction based on modal processing of the conversion matrix.

The present invention discloses a horizontal axial angular vibration device, comprising a base; a moving component, at least comprising a table surface for disposing a test equipment and a main shaft connected to the table surface to drive the table surface to rotate; a driving component, associated with the table surface and/or main shaft to drive the table surface to swing around the axis of the main shaft; the axis of the main shaft is horizontally disposed.

A dynamic characteristic measurement device of the present invention includes magnetic force generators (1a, 1b, 2a, 2b) arranged on the back surface side of impellers (4, 5), the magnetic force generators that oscillate the impellers (4, 5) with magnetic force, an oscillation controller (12) that drives these magnetic force generators, and vibration sensors (13, 14) that detect vibration of a rotation shaft (3). The dynamic characteristic measurement device further includes an arithmetic device (16) that calculates a dynamic characteristic of a rotor (6) by implementing a frequency analysis and a mode analysis based on an oscillation signal from the oscillation controller (12) and a vibration signal from the vibration sensors (13, 14).

A vibration-centrifugation composite test apparatus and a control method thereof, the apparatus comprises: a centrifuge, an air-cooled electric vibration table and a control electrical cabinet the air-cooled electric vibration table comprises a vibration table main machine and a fan; a central axis of the moving coil in the vibration table main machine is on the same straight line as a horizontal center line of the rotation arm in the centrifuge; the fan is a horizontal fan and disposed above the center of the rotation arm, and a fan cover cabinet is mounted outside the horizontal fan; the control electrical cabinet is mounted above the fan cover cabinet, a power supply line of the control electrical cabinet is connected to a power supply through the conductive slip ring, and a vibration feedback signal line of the vibration table main machine is directly connected to the control electrical cabinet.