Modular oil film damping test device and method

Abstract

The invention discloses a modular oil film damping test device. A cylindrical upper test piece is sleeved in a sleeve from top to bottom. The upper test piece and the contact surface of the sleeve keep clearance fit. Oil is injected into the gap to form an oil film. The sleeve is supported and fixed on a base through peripheral steps. A dynamic force sensor is fixedly arranged at the axis of the upper end face of the upper test piece. The dynamic force sensor goes upward and is fixedly connected with an excitation rod. A first accelerometer is arranged on the upper end face of the upper test piece. A non-contact micro-displacement sensor and a second accelerometer are arranged on the upper end face of the sleeve. The invention further discloses a modular oil film damping test method. The device provided by the invention has the advantages of simple structure and convenient method implementation, and is of great significance for the scientific research of an oil film damping mechanism and the promotion and application of an oil film damper.

Description

technical field [0001] The invention belongs to the technical field of structural dynamic characteristic testing, and relates to a modular oil film damping test device, and also relates to a modular oil film damping test method. Background technique [0002] Vibration is often generated when mechanical equipment is working, and vibration will have a serious impact on the working accuracy, reliability, and service life of mechanical equipment. The damping in the structural system, such as oil film damping, frictional damping, material damping, viscoelastic damping, etc., will have a good suppression effect on the vibration in the mechanical structure, so reasonable matching of damping will improve the vibration resistance of the mechanical structural system and ensure the safety of equipment. Job stability is important. [0003] Oil film damping exists in the oil between two structural parts with relative motion. When the two structural parts reciprocate relative to each oth...

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Problems solved by technology

[0004] Although oil film damping is widely used in engineering, the design of oil film dampers still depends on experience. What is the relationship between oil film damping and oil film thickness, viscosity, size, vibration frequency, vibration amplitude, etc., at present, from theory to experiment There is still no clear statement, so that the rational design of the oil film damper lacks effective scientific guidance, which affects the effective development and application of the oil film damper

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