CN109612713B

CN109612713B - Comprehensive stress simulation test device for heat, sound and vibration

Info

Publication number: CN109612713B
Application number: CN201910038666.9A
Authority: CN
Inventors: 黄首清; 刘守文; 姚泽民; 刘闯; 刘大志; 樊世超; 杨江; 吴儒亮; 胡芳
Original assignee: Beijing Institute of Spacecraft Environment Engineering
Current assignee: Beijing Institute of Spacecraft Environment Engineering
Priority date: 2019-01-16
Filing date: 2019-01-16
Publication date: 2021-01-05
Anticipated expiration: 2039-01-16
Also published as: CN109612713A

Abstract

The invention discloses a thermoacoustic vibration comprehensive stress simulation test device which comprises a vibration part, a sound insulation part and a thermoacoustic part. Wherein, the vibration part mainly includes base and shaking table, and the part that gives sound insulation mainly includes box, chamber door, observation window, end cap, and the heat sound part mainly includes speaker, sucking disc, infrared lamp battle array, horizontal axis, handle, connector, vertical axle. The invention can simulate thermal stress, noise stress and vibration stress at the same time; the heating mode is local heating by an infrared lamp, so that adverse effects on a loudspeaker, a sensor and the like can be avoided; the box body structure has the sound insulation effect on one hand and also has a certain heat preservation effect on the other hand; horizontal axis, vertical axis, connector, handle isotructure conveniently adjust the position and the radiation angle of infrared lamp battle array, and structurally combine together with the box.

Description

Comprehensive stress simulation test device for heat, sound and vibration

Technical Field

The invention belongs to the technical field of environmental tests and aerospace crossing, and particularly relates to a comprehensive stress test device capable of simulating three stresses of heat, sound and vibration simultaneously.

Background

In the aviation field, along with the continuous improvement of thrust-weight ratio and working efficiency, an aircraft engine develops towards the directions of high temperature, high pressure and high rotating speed, the working environment of internal structural components is also severer, and the internal structural components bear larger thermal stress, vibration stress and noise stress. The complex coupling effect exists among the three stresses of heat, sound and vibration, for example, the thermal stress can cause the blade material in the aircraft engine to soften and deform, and further influence the resonance frequency and fatigue limit of the vibration, and more particularly, the noise stress can be coupled with the vibration stress at some resonance frequencies to cause resonance or flutter, and in some extreme cases, the noise stress can generate great destructiveness.

However, in the field of aerospace, thermal, acoustic and vibration multi-stress coupling environments exist in different degrees for thin-wall structural parts in hypersonic aircrafts, thin-wall parts of rocket engine nozzles and the like. In conclusion, designing a test system capable of simultaneously simulating thermal acoustic vibration stress is very important for verifying and evaluating the reliability and the service life of a plurality of aerospace products.

The main technical problem of the design of the thermal acoustic vibration comprehensive stress test system lies in how to reasonably and simultaneously apply three stresses of thermal acoustic vibration, and particularly, the adverse effects of high-strength stress (mainly high temperature) on stress excitation equipment, sensor equipment and high-strength noise on the environment are fully considered. For example, high temperature may not only damage the magnetic properties of the cone, diaphragm, and magnet of the speaker, but also affect the measurement sensors such as the laser vibrometer (vibration displacement sensor) and the sound intensity meter (noise sensor); in addition, the damage of high-strength noise to the hearing of test operators is avoided.

Disclosure of Invention

The invention aims to provide a thermal, acoustic and vibration comprehensive stress simulation test device which can simultaneously simulate thermal stress, noise stress and vibration stress. The core of the invention focuses on the design of hardware, spatial position and connection relation of the test device for embodying three kinds of stress interaction, and the matched control software and hardware devices, sensor devices and the like are not the core of the invention and can continue to use the conventional technology, so the invention is not elaborated in detail.

The invention adopts the following technical scheme:

the comprehensive stress simulation test device for the thermal acoustic vibration comprises a vibration part, a sound insulation part and a thermoacoustic part, wherein the vibration part mainly comprises a base used as a support of the whole test device and a vibration table arranged on the base; the sound insulation part mainly comprises a box body, a box door, an observation window and a plug, wherein the bottom of the box body is provided with a hole for allowing the vibration table to pass through and surround a closed space formed by the box body and the box door so as to carry out sound insulation and heat insulation, the box door is provided with the observation window, the side wall of the box door is provided with the hole for passing through a cable, and the hole is sealed by the plug made of elastic materials; the hot sound part mainly includes the speaker, the sucking disc, the infrared lamp battle array, the horizontal axis, the handle, the connector, vertical axle, wherein, the speaker passes through the sucking disc to be fixed on the bottom surface in the box and does not take place to interfere with the shaking table under the operating condition, the connector plays the effect of adjusting and fixing tie point position and relative angle between vertical axle and the horizontal axis, and then play the position and the radiation angle of the infrared lamp battle array that the vertical axle bottom of regulation links firmly, the horizontal axis passes the box lateral wall, handle rotation or removal horizontal axis outside through the box, indirectly play the effect of adjusting infrared lamp battle array position and radiation angle.

Wherein, the observation window is sealed by transparent material.

Wherein, the horizontal axis passes through the lateral wall of the box body in a light hole connection or threaded connection mode.

Wherein, the end cap is one set or a plurality of sets.

Wherein, the infrared lamp array, the horizontal axis, the handle, the connector, the vertical axis are one set or a plurality of sets.

Wherein "horizontal" and "vertical" of the horizontal axis and the vertical axis represent only a relative relationship of two axes, and do not represent that the horizontal axis is limited to be only horizontal, nor that the vertical axis is limited to be only vertical.

Wherein, the sucking disc is connected on the bottom surface of the box body in a magnetic or atmospheric pressure or screw connection mode.

Wherein the transparent material may be glass.

And the gap between the bottom surface of the box body and the vibrating table is plugged by a flexible material which is fixedly connected with the bottom surface of the box body and the vibrating table at the same time.

And a sound insulation effect is achieved between the box body and the box door through a sealing material.

Compared with the prior art, the invention has the following prominent substantive characteristics and remarkable advantages:

the invention can simulate thermal stress, noise stress and vibration stress at the same time; the heating mode is local heating by an infrared lamp, so that adverse effects on a loudspeaker, a sensor and the like can be avoided; the box body structure has the sound insulation effect on one hand and also has a certain heat preservation effect on the other hand; horizontal axis, vertical axis, connector, handle isotructure conveniently adjust the position and the radiation angle of infrared lamp battle array, and structurally combine together with the box.

Drawings

FIG. 1 is a schematic view of the appearance of the embodiment 1 of the present invention at a certain angle;

FIG. 2 is a schematic external view from another angle in example 1 of the present invention;

FIG. 3 is a schematic structural diagram of embodiment 1 of the present invention after hiding the box door and the observation window;

fig. 4 is a schematic view of a device for adjusting the position and radiation angle of an infrared lamp array in embodiment 1 of the present invention.

In the figure: 10-a base; 11-a vibration table; 20-a box body; 20A-the bottom surface of the box body; 21-a box door; 22-a viewing window; 23-plug; 30-a loudspeaker; 31-a suction cup; 32-infrared lamp array; 33-horizontal axis; 34-a handle; 35-a connector; 35A-horizontal axis clamping block; 35B-vertical shaft clamping block; 35C-fastening screws; 36-vertical axis.

Detailed Description

The principles, structure and features of the present invention will be further explained with reference to the accompanying drawings.

Referring to fig. 1, fig. 1 shows an appearance diagram of embodiment 1 of the present invention at a certain angle; FIG. 2 is a schematic external view from another angle in example 1 of the present invention; the thermoacoustic vibration comprehensive stress simulation test device comprises a vibration part, a sound insulation part and a thermoacoustic part from the appearance. Wherein, the vibrating part mainly comprises a base 10 and a vibrating table 11 (not shown in fig. 1-2) supported above the base 10, and the sound insulation part mainly comprises a square box body 20, a box door 21, an observation window 22, a plug 23 and a handle 34 arranged on the side wall of the box body in a penetrating way. The vibration table 11 is accommodated on the bottom of the box body through a hole at the bottom of the box body 20, wherein a gap between the bottom surface of the box body and the vibration table 11 is sealed by a flexible material which is fixedly connected to the bottom surface of the box body and the vibration table 11 at the same time.

Referring to fig. 3, fig. 3 shows a schematic structural view after a box door and an observation window are hidden in embodiment 1 of the present invention; specifically, the vibration part mainly comprises a base 10 and a vibration table 11, the sound insulation part mainly comprises a box body 20, a box door 21, an observation window 22 and a plug 23, and the thermoacoustic part mainly comprises a loudspeaker 30, a suction cup 31, an infrared lamp array 32, a horizontal shaft 33, a handle 34, a connector 35 and a vertical shaft 36. Wherein, the connector 35 is composed of a horizontal shaft clamping block 35A; a vertical shaft clamping block 35B; a fastening screw 35C, the horizontal shaft 33 is matched with the horizontal shaft clamping block 35A in a light hole mode, the vertical shaft 36 is matched with the vertical shaft clamping block 35B in a light hole mode, the fastening screw 35C performs a tightening operation after the relative position and the angle between the horizontal shaft 33 and the vertical shaft 36 are adjusted, and the horizontal shaft 33 and the vertical shaft 36 are acted by friction force. The base 10 provides support for the entire apparatus and protection for the vibration table 11. The bottom of the box 20 has a hole for allowing the vibration table 11 to pass through. The box body 20 and the box door 21 form a closed space for sound insulation and heat insulation, wherein the box door 21 is provided with the observation window 22 sealed by transparent glass. The side wall of the box body 20 is sealed by the plug 23 made of sponge material through the hole of the cable. Loudspeaker 30 passes through sucking disc 31 adsorbs on incasement bottom surface 20A through the atmospheric pressure principle, and not with under the operating condition shaking table 11 takes place to interfere, and sucking disc 31 accessible magnetism principle or atmospheric pressure principle or spiro union mode are connected on box bottom surface 20A. Infrared lamp battle array 32 with vertical axle 36 links firmly, vertical axle 36 passes through connector 35 with horizontal axis 33 is connected, the connector plays to adjust and is fixed vertical axle 36 with the effect of junction position and relative angle between the horizontal axis 33, and then plays the effect of adjusting infrared lamp battle array 32 position and radiation angle. The horizontal shaft 33 passes through the side wall of the box body 20 in a light hole connection or threaded connection mode, and the horizontal shaft 33 can be rotated or moved through the handle 34 outside the box body, so that the function of adjusting the position and the radiation angle of the infrared lamp array 32 can be indirectly achieved. The number of the plugs 23 can be two, and the plugs are symmetrically distributed on two side walls of the box body 20.

Specifically, fig. 4 shows a schematic diagram of a device for adjusting the position and radiation angle of an infrared lamp array in embodiment 1 of the present invention. The number of the infrared lamp arrays 32, the horizontal shafts 33, the handles 34, the connectors 35 and the vertical shafts 36 may be two, wherein the 2 horizontal shafts 33 respectively penetrate through two side walls of the box body 20. The gap between the bottom surface 20A of the box body and the vibration table 11 is sealed by rubber materials which are fixedly connected with the bottom surface 20A of the box body and the vibration table 11 at the same time. The space between the cabinet 20 and the door 21 is made of rubber material to provide sound insulation.

Although particular embodiments of the invention have been described and illustrated in detail, it should be understood that various equivalent changes and modifications could be made to the above-described embodiments in accordance with the spirit of the invention, and the resulting functional effects would still fall within the scope of the invention, without departing from the spirit of the description and the accompanying drawings.

Claims

1. The comprehensive stress simulation test device for the thermal acoustic vibration comprises a vibration part, a sound insulation part and a thermoacoustic part, wherein the vibration part comprises a base used as a support of the whole test device and a vibration table arranged on the base; the sound insulation part comprises a box body, a box door, an observation window and a plug, wherein the bottom of the box body is provided with a hole for allowing the vibration table to pass through and surround a closed space formed by the box body and the box door so as to carry out sound insulation and heat insulation, the box door is provided with the observation window, the side wall of the box door is provided with the hole for passing through a cable, and the hole is sealed by the plug made of elastic materials; the thermoacoustic part mainly comprises a loudspeaker, a sucker, an infrared lamp array, a horizontal shaft, a handle, a connector and a vertical shaft, wherein the loudspeaker is fixed on the bottom surface in the box body through the sucker and does not interfere with a vibrating table in a working state; in the following description, the terms "horizontal" and "vertical" in the horizontal axis and the vertical axis only represent relative relationships between two axes, and do not represent that the horizontal axis is limited to be horizontal, nor that the vertical axis is limited to be vertical.

2. The integrated stress simulation test apparatus of claim 1, wherein the viewing window is sealed by a transparent material.

3. The comprehensive stress simulation test device of claim 1, wherein the horizontal shaft penetrates through the side wall of the box body in a light hole connection or a threaded connection mode.

4. The comprehensive stress simulation test device according to any one of claims 1 to 3, wherein the plug is one or more sets.

5. The comprehensive stress simulation test device according to any one of claims 1 to 3, wherein the infrared lamp array, the horizontal shaft, the handle, the connector and the vertical shaft are one or more sets.

6. The comprehensive stress simulation test device according to any one of claims 1 to 3, wherein the suction cup is connected to the bottom surface of the box body by magnetism or atmospheric pressure or a screw connection manner.

7. The integrated stress simulation test apparatus of claim 2, wherein the transparent material is glass.

8. The integrated stress simulation test device according to any one of claims 1 to 3, wherein the gap between the bottom surface of the box body and the vibration table is blocked by a flexible material which is simultaneously fixedly connected to the bottom surface of the box body and the vibration table.

9. The comprehensive stress simulation test device according to any one of claims 1 to 3, wherein a sound insulation effect is provided between the box body and the box door through a sealing material.