CN212516217U

CN212516217U - Noise reduction device applied to D-level flight simulator

Info

Publication number: CN212516217U
Application number: CN202020298364.3U
Authority: CN
Inventors: 王猛; 刘成鑫; 熊锋
Original assignee: Shanghai Huamo Technology Co ltd
Current assignee: Shanghai Huamo Technology Co ltd
Priority date: 2020-03-12
Filing date: 2020-03-12
Publication date: 2021-02-09
Anticipated expiration: 2030-03-12

Abstract

The utility model discloses a be applied to device of making an uproar falls of D level flight simulator, which comprises a bracket, the layer of making an uproar falls in the fixedly connected with medium-high frequency on the support, the layer of making an uproar falls in the fixedly connected with medium-low frequency on the layer of making an uproar falls in the medium-high frequency, set up a plurality of evenly distributed's the sound hole of inhaling on the layer of making an uproar falls in the medium-low frequency, inhale the bell mouth that the sound hole is the aperture. The utility model discloses can play the effect of making an uproar of falling to the noise of centering high frequency, well low frequency, promote the noise reduction effect.

Description

Noise reduction device applied to D-level flight simulator

Technical Field

The utility model relates to a simulator field especially relates to a be applied to device of making an uproar falls of D level flight simulator.

Background

The simulation machine has the advantages that factors such as environmental protection, energy and cost are integrated, and most of simulation machine manufacturers select a motion platform with pure electricity as power to replace the original pneumatic and hydraulic power. Compared with the original design, the noise in the analog cabin becomes a concern for analog engine manufacturers and customers.

The working environment of the pilot, the recognition capability of the pilot on various signals and the training fidelity are seriously influenced by excessive noise in the simulated aircraft cabin. Therefore, the method has very important practical significance in analyzing the internal noise condition of the simulator and providing corresponding noise reduction measures. Noise in the analog cabin mainly originates from noise sources (motion platform actuator extension and internal mechanical structure noise) and vibration. The acoustic energy and vibrations of these noise sources enter the simulated nacelle through both air and frame structure propagation paths. The first path is that noise is directly transmitted into the analog cabin through a frame structure and a door and window gap, and is called as air sound; the second type of sound source or vibration (source) in the path cabin acts on the frame structure, interior panel, and excites the interior panel, etc., to vibrate and produce noise, referred to as structural sound. By analysis and testing, the sound pressure in a typical cabin consists of two parts: firstly, direct sound of a noise source; secondly, mixed sound is formed by multiple reflections of the inner panel in the cabin.

At present, noise reduction of a simulator is mainly passive noise reduction, and the simulator mainly starts from the following two aspects: firstly, eliminating or weakening a noise source, for example, a motion platform power system adopts gas and hydraulic pressure as power, and the method has relatively high cost and great difficulty; and secondly, controlling a noise transmission path, and reducing noise in the analog engine room by adopting a single sound insulation material, wherein the noise in the analog engine room is noise with sound wave energy at each frequency, and the noise in the analog engine room cannot have a noise reduction effect on the noise at each frequency by adopting the single sound insulation material.

Disclosure of Invention

In order to solve the problem mentioned in the above-mentioned background art, the utility model provides a be applied to the device of making an uproar that falls of D level flight analog machine can all play the noise reduction effect to the noise of each frequency.

The utility model provides a be applied to device of making an uproar that falls of D level flight simulator, includes the support, the layer of making an uproar falls in the fixedly connected with medium-high frequency on the support, the layer of making an uproar falls in the fixedly connected with medium-low frequency on the layer of making an uproar falls in the medium-high frequency, set up a plurality of evenly distributed's on the layer of making an uproar falls in the medium-low frequency and inhale the sound hole, it is the bell mouth that.

Further, the medium-high frequency noise reduction layer is a vinyl foam board.

Further, the medium and low frequency noise reduction layer is a polyurethane rubber plate.

The utility model has the advantages that:

1. the utility model discloses be equipped with the medium-high frequency and fall the layer of making an uproar, the layer of making an uproar falls in the well low frequency, can play the effect of making an uproar of falling to the noise of medium-high frequency, well low frequency, promoted the noise reduction effect.

2. The utility model discloses a be equipped with the bell mouth of aperture convergent from top to bottom on the layer of making an uproar falls in well low frequency, can be disturbed by the lateral wall reflection of bell mouth when the noise gets into the bell mouth to the noise has been reduced.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Wherein, 1 is the support, 2 is the medium and high frequency noise reduction layer, 3 is the medium and low frequency noise reduction layer, 4 is the sound absorbing hole.

Detailed Description

The present invention will be described in further detail below with reference to the accompanying drawings by way of specific embodiments.

As shown in the figure, the noise reduction device applied to the D-level flight simulator comprises a support 1, a middle-high frequency noise reduction layer 2 is fixedly connected to the support 1, a middle-low frequency noise reduction layer 3 is fixedly connected to the middle-high frequency noise reduction layer 2, a plurality of uniformly distributed sound absorption holes 4 are formed in the middle-low frequency noise reduction layer 3, and the sound absorption holes 4 are tapered holes with gradually reduced hole diameters from top to bottom. The support 1 and the medium-high frequency noise reduction layer 2, and the medium-high frequency noise reduction layer 2 and the medium-low frequency noise reduction layer 3 can be fixedly connected in a bonding mode.

Wherein the medium-high frequency noise reduction layer 2 is a vinyl foam board.

Wherein, the middle and low frequency noise reduction layer 3 is a polyurethane rubber plate.

The utility model discloses when concrete implementation: the support 1 is fixed on a frame structure of the simulator, and the frame structure mainly comprises a chassis frame of the simulator and a frame structure arranged in the simulator. The noise enters the tapered hole and is reflected and interfered by the side wall of the tapered hole, the low and medium frequency noise is reduced, and then the medium and high frequency noise is reduced through the medium and high frequency noise reduction layer 2.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a be applied to device of making an uproar that falls of D level flight simulator which characterized in that, includes the support, the layer of making an uproar falls in the fixedly connected with medium-high frequency on the support, the layer of making an uproar falls in the fixedly connected with medium-low frequency on the layer of making an uproar falls in the medium-high frequency, set up a plurality of evenly distributed on the layer of making an uproar falls in the medium-low frequency and inhale the sound hole, inhale the bell mouth that the sound hole.

2. The noise reducer applied to the class-D flight simulator according to claim 1, wherein the medium-high frequency noise reduction layer is a vinyl foam sheet.

3. The noise reduction device applied to the D-class flight simulator according to claim 1, wherein the medium and low frequency noise reduction layer is a polyurethane rubber plate.