Vibration experimental platform for thin-walled member fatigue test

Abstract

The invention discloses a vibration experimental platform for a thin-walled member fatigue test. The vibration experimental platform comprises an excitation source test device and an end clamp on a platform base; the excitation source test device comprises a U-shaped bracket; a laser displacement sensor is disposed on the bottom of the U-shaped bracket; first hinge pins are disposed on both sides of the upper end of the U-shaped bracket; the first hinge pins are sleeved by boxes; damping springs are arranged between each box and both ends of the corresponding box; piston vibration exciters are disposed on the tops of the boxes; first screws are disposed in the boxes; each first screw is provided with two symmetrical wedges; the lower ends of the wedges are in contact with a upper splint; the bottom cover of each box is provided with a lower splint; the upper and lower splint are cooperating with each other to form a clamp for sandwiching the thin-walled member; and a speed sensor and an acceleration sensor are arranged on one end of the excitation source test device on the thin-walled member. The vibration experimental platform can equivalently regenerate the fatigue process of an aviation aluminum alloy thin-walled component in a relatively short period, and calculates and evaluates the service life of the component.

Description

technical field [0001] The invention relates to the technical field of material testing equipment, in particular to a vibration experiment platform for fatigue testing of thin-walled components. Background technique [0002] With the rapid progress of modern industry, many machinery and equipment are developing in the direction of high speed, high temperature difference and high pressure. As a result, the factors causing failure of equipment structural parts are also increasing, among which fatigue failure caused by vibration is the most common. The equipment in the aviation is in service in a quite serious vibration environment. In order to ensure the safe use of aeronautical equipment in service, it is particularly important to evaluate the fatigue resistance and service life of aluminum alloy thin-walled components used in aeronautical manufacturing. In the actual environment, vibration is the load that must be borne by engineering structures. Judging from the current re...

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Problems solved by technology

In the actual environment, vibration is the load that must be borne by engineering structures in service. Judging from the current research status, the vibration fatigue experimental technology for thin-walled frame parts is not mature enough, and there is still a lack of universal experimental methods. Standardized Experimental Procedures

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