Two-dimensional plane vibration test bench based on rotation force excitation

Abstract

The invention discloses a two-dimensional plane vibration test bench based on rotation force excitation, and the test bench is characterized in that the test bench comprises a base, a power transmission system, a laminated guide rail vibration platform, and an eccentric force generator module; the upper end face of the base is connected with a laminated guide rail vibration platform in a supporting mode, the laminated guide rail vibration platform is divided into an upper layer and a lower layer, each layer is provided with a pair of linear guide rail mechanisms parallel to each other on the horizontal plane, and the upper layer guide rail mechanism and the lower layer guide rail mechanism are orthogonal to each other so that the laminated guide rail vibration platform can move in a plane formed in the orthogonal direction; the power transmission system provides a rotating test environment for the whole test bench; and the eccentric force generator module provides excitation for the vibration platform and is mainly composed of an aluminum box and an eccentric force generator, and the aluminum box is used for fixedly installing the eccentric force generator. According to the vibration test bench, the vibration boundary condition in a two-dimensional plane can be realized, and the excitation source is in a rotating system, so that the vibration characteristics in the helicopter propeller hub plane can be simulated.

Description

technical field [0001] The invention belongs to the field of vibration test systems, and in particular relates to a two-dimensional plane vibration test bench based on rotation force excitation. Background technique [0002] The vibration test bench is the basic equipment in the field of vibration research. When used in the field of vibration reduction technology, it can be used to meet the requirements of specific engineering applications that need to generate expected vibration to simulate the working environment of the equipment. The main principle is that the vibration platform moves according to the set control law, thereby simulating the real vibration environment of the equipment during normal operation, so as to achieve the purpose of simulating the vibration boundary conditions of the equipment. [0003] Chinese patent document CN 104568477 B disclosed a two-dimensional plane vibration test bench on May 10, 2017. The design vibration direction is a combination of a ...

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Problems solved by technology

[0003] Chinese patent document CN 104568477 B disclosed a two-dimensional plane vibration test bench on May 10, 2017. The design vibration direction is a combination of a direction in the two-dimensional horizontal plane and a vertical direction, and vibration simulation in the orthogonal direction cannot be realized, and The vibration characteristics test in the plane of the simulated helicopter hub cannot be carried out; foreign literature (Mark Wilson and Dr. Mark Jolly, "Ground Test of a Hub Mounted Active Vibration Suppressor", Presented at the American Helicopter Society 63rd Annual Forum, Virginia Beach, VA., May 1-3, 2007.) discloses another form of vibration test bench, which can satisfy the vibration degrees of freedom in two directions in the two-dimensional plane, but the excitation of the vibration table is installed in the orthogonal direction under the fixed system Combination of two hydraulic actuators

Due to the "filtering" effect of the propeller hub, and the synthesis conditions of the orthogonal harmonic excitation are very strict, even if the frequency and phase are controlled within a small error range in this excitation mode, the synthetic excitation and the desired simulated vibration will be caused There is a large difference in excitation, and the obtained vibration effect is even more different from the expected; and this excitation method is not based on the force generator of the rotating system, and cannot accurately simulate the vibration excitation characteristics in the plane of the helicopter hub

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