Vibration-damping supporting rod device
A technology of support rods and sleeves, which is applied in the direction of shock absorbers, shock absorbers, springs/shock absorbers, etc., can solve the problems of being difficult to withstand external forces, affecting aircraft vibration and noise reduction, and poor vibration reduction effects, etc., to achieve The effect of isolating vibration transmission, improving structural life, and reducing maintenance costs
Inactive Publication Date: 2019-04-16
XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
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Problems solved by technology
This type of shock absorber / vibration isolator has an obvious vibration reduction function in a single direction, especially at the joint, where the vibration direction transmitted to this part is difficult to keep in line with the vibration reduction direction of the less effective
[0004] Since the current shock absorber only has the function of vibration reduction, it is difficult to bear the external force, so it is installed as an additional weight of the aircraft.
Especially in the case of strict weight requirements, the additional weight may be unacceptable, resulting in the inability to install the shock absorber, thus affecting the effect of aircraft vibration and noise reduction
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[0018] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments of the present invention. What needs to be explained before this is that the terms or words used in this specification and claims should not be limited to be interpreted as the usual meaning or the meaning in the dictionary, but should be based on the best way for the inventor to explain his invention. The principle of appropriately defining the concepts of terms is interpreted as meanings and concepts consistent with the technical idea of the present invention. Subsequently, the embodiment described in this description and the structure shown in the drawings are only one of the best embodiments of the present invention, and cannot fully represent the technical ideas of the present invention, so it should be unde...
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The invention belongs to the field of aircraft vibration and noise control, and particularly relates to a vibration-damping supporting rod device. The vibration-damping supporting rod device is characterized by comprising a sleeve, a series multi-period structural spring and connection joints, the series multi-period structural spring is arranged in the sleeve, and two ends of the spring are connected with the connection joints. The series multi-period structural spring is composed of spring connectors, first springs and second springs, the first springs and the second springs are connected bythe spring connectors to form a plurality of connection units, and the multiple connecting units are arranged in series to form periodic arrangement. The band-gap characteristic of the natural frequency of a periodic structure is used for vibration-damping and noise reduction, the vibration transmission of an excitation source is effectively isolated, and the vibration damping performance is improved. The vibration-damping supporting rod device has a load-bearing characteristic by a spring device, and the weight reduction of an aircraft structure can be achieved. Since rubber-like materials are not used, the problem of material aging is solved, the structural life is prolonged, and the maintenance cost is reduced.
Description
technical field [0001] The invention belongs to the field of aircraft vibration and noise control, in particular to a vibration-damping support rod device for reducing vibration and noise transmission. It involves vibration and noise control of strong vibration and high noise equipment including engines and high speed. Background technique [0002] In the field of aircraft vibration and noise control, shock absorbers are a common vibration and noise control device. A common design of these shock absorbers is a spring-damper design. The principle of vibration reduction is that the shock absorber has a certain stiffness, which will generate a restoring force proportional to the vibration displacement when vibrating; and because it has damping, it will also generate a damping force proportional to the vibration velocity when vibrating. Through stiffness and damping The design minimizes the vector sum of the two forces and achieves the purpose of vibration reduction. [0003]...
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IPC IPC(8): F16F7/104
CPCF16F7/104
Inventor 高飞顾金桃王美燕付刚胡陈映
Owner XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA