RU2736846C1 - Universal test bench for aircraft-guided missiles for dynamic loads - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention relates to vibration testing equipment, namely, to devices (benches) for tests for vibration effects of aircraft rockets in laboratory bench conditions. Proposed device comprises two unidirectional rotary vibration exciter connected with appliance with standard suspension assemblies to carrier aircraft and portals for signage. Vibration exciters are installed on hollow power frames, consisting of 2 parts: upper and lower, and inside upper parts of frames there are grip assemblies, to which the article is attached through suspension assemblies.

EFFECT: technical result consists in creation of universal dynamic bench for accurate simulation of real loads during vibration tests, obtaining complete and reliable information on loading of the structure of the article during operation, as well as simplifying the design, reducing its weight and power consumed during operation.

5 cl, 2 dwg

Description

The invention relates to vibration testing equipment, namely to devices (stands) for testing the vibration effects of aircraft missiles in laboratory bench conditions.

Known "Stand for vibration testing of long products" (see RU No. 89891, IPC G01M 7/00, 2006), which contains a vibration exciter with a platform and a device for fastening the test product, made in the form of a hollow rectangular prism and installed on the platform. In addition, holes are made in the end faces of the prism for passing the fastening elements of the test product through them.

The above device for carrying out large-sized long products, like aircraft guided missiles, has the following disadvantages:

- the dimensions and weight of the device to create the necessary rigidity used to attach it to the vibration exciter platform increase significantly;

- the complexity of the structures decreases the reliability of the device;

- the center of gravity of the product with the device must be aligned with the axis of the vibration exciter;

- a powerful stand with high pushing force is required,

- the complexity of the transmission of vibration loads to the standard rocket suspension units using a single vibration exciter;

- it is possible to shift the dynamic center of gravity due to the resonance of long products;

- the need to design and manufacture a special fastening device for each specific type of product.

The proposed invention solves the problem of creating a universal dynamic stand for accurate imitation of real loads during vibration tests, in obtaining complete and reliable information about the loading of the product structure during operation. As well as simplifying the design, reducing its weight and power consumption.

The solution to these problems is achieved by the fact that a universal dynamic stand for vibration testing of aircraft guided missiles for dynamic loads has two vibration exciters, which are located so that their central axes of the platforms are perpendicular under the product suspension units. At the same time, there is no centering, therefore, there is a tipping moment along the longitudinal axis of the product, which can lead to breakage of the moving parts of the vibration stands, as well as to bending deformation of the rocket body. To eliminate these moments, the frame bases must be attached to the exciter platforms using clearance-free support hinges.

A universal stand for testing aircraft guided missiles (hereinafter referred to as products) for dynamic loads (hereinafter referred to as the stand) is shown in Fig. 1.

On two vibration exciters 1, two separate unconnected hollow power frames are installed with the help of backlash-free supporting hinges 2, the internal dimensions of which must be larger than the dimensions of the tested products. Each frame consists of 2 parts: lower 3 and upper 4. Inside the upper parts of the frames, gripping units 5 are mounted to which the product 8 is attached through the suspension units 7. Frames 3/4 with the product 8 are installed on vibration exciters 1 in such a way that the transmission of vibration The impacts took place along the plane passing through the vertical axis of the vibration exciter 1 to the suspension nodes 7 of the product 8. Depending on the design, the distance (length) between the suspension nodes 7 of the product 8 is selected by moving the vibrators 1 in the direction of the longitudinal axis "X" along the load-bearing floor of the test room. To remove the static load from the vibration exciters 1 and keep the product 8 in a horizontal position, the product 8 must be hung out using the portal 6.

To test the product along the Z axis (see Fig. 2), the vibration exciters are rotated 90 degrees to a horizontal position, in this case the product is held in a horizontal position using the cables 10, and the vibration loads from the vibration exciters to the product are transmitted through the rods 11.

The stand can operate both from one system and from 2 interconnected systems, with adjustable phase shifters, a set of filters and other equipment for generating a signal of specified parameters, with vibration analysis according to the readings of control acceleration sensors (strain gauges) along the length of the product (in the figure not shown).

The proposed technical solution can be used in vibration tests as close as possible to the operating conditions of aircraft guided missiles in assemblies of different types under the carrier aircraft to simulate vibration effects during operation.

Claims (5)

1. A universal stand for testing aircraft guided missiles for dynamic loads containing two unidirectional rotary vibration exciters, which are connected to a device that has standard units for hanging the product to the carrier aircraft and portals for signage, characterized in that the vibration exciters are installed on hollow power frames, consisting of 2 parts: upper and lower, and inside the upper parts of the frames, gripping units are mounted, to which the product is attached through the suspension units. 2. A universal stand for testing aircraft guided missiles for dynamic loads according to claim 1, characterized in that the frames with the product are mounted on vibration exciters so that the vibration effects are transmitted along a plane passing through the vertical axis of the vibration exciter to the product suspension units. 3. A universal stand for testing aircraft guided missiles for dynamic loads according to claim 1, characterized in that the distance between the suspension nodes of the product is selected by moving the vibrators in the direction of the longitudinal axis "X" along the load-bearing floor of the test room. 4. A universal stand for testing aviation guided missiles for dynamic loads according to claim 1, characterized in that the removal of the static load from the vibration exciters and the holding of the product in a horizontal position is ensured by hanging the product using a portal. 5. A universal stand for testing aircraft guided missiles for dynamic loads according to claim 1, characterized by the fact that when testing a product along the Z axis, vibration exciters are rotated to a horizontal position, and the product is held in a horizontal position using cables, and vibration loads from the vibration exciters to the product transmitted through the rods.

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