Method for designing three-way equal-rigidity rubber shock absorber of platform type inertial navigation system

A rubber shock absorber, inertial navigation system technology, applied in design optimization/simulation, instrumentation, calculation, etc., can solve the problems of preparing a large number of test samples, consuming a lot of resources, and long design cycle, so as to avoid the preparation and design cycle. Short, time-consuming effects

Active Publication Date: 2016-06-22
SOUTHEAST UNIV
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Problems solved by technology

In the design process, if you only rely on test methods, you need to prepare a large number of te

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  • Method for designing three-way equal-rigidity rubber shock absorber of platform type inertial navigation system
  • Method for designing three-way equal-rigidity rubber shock absorber of platform type inertial navigation system
  • Method for designing three-way equal-rigidity rubber shock absorber of platform type inertial navigation system

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Embodiment Construction

[0026] Below in conjunction with specific embodiment, further illustrate the present invention, should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various equivalent forms of the present invention All modifications fall within the scope defined by the appended claims of the present application.

[0027] Such as figure 1 Shown is a schematic diagram of a rubber shock absorber and its rotating section. The rubber shock absorber in this embodiment is composed of two sections of duralumin rings and a rubber ring in the middle, wherein the material parameters of duralumin are: modulus of elasticity is 72GPa, density is 3100kg / m 3 , the Poisson's ratio is 0.33, and the damping coefficient is 0.001; the material parameters of the rubber are: the elastic modulus is 1MPa, and the density is 960kg / ...

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Abstract

The invention discloses a method for designing a three-way equal-rigidity rubber shock absorber of a platform type inertial navigation system. The method comprises the following steps: designing the rotating section of a rubber ring into a parallelogram and carrying out parameterized modeling on a rubber shock absorber; establishing a finite element model of a rubber shock absorber system according to the value of a modeling parameter; carrying out modal analysis on the finite element model of the rubber shock absorber system through applying a fixed constraint boundary condition, so as to obtain a linear vibration inherent frequency fy of the system in the direction, of a y axis, parallel to the direction of a rotation shaft of the shock absorber and linear vibration inherent frequencies fx and fz of the system in the directions of an x axis and a z axis; adjusting the values of parameters m and/or n to ensure that the x axis and the z axis approach to the linear vibration inherent frequencies; and adjusting the values of parameters a and/or b to ensure that the frequencies satisfy a design target. By taking finite element modeling analysis as a measure, the method disclosed in the invention is capable of effectively assisting the experiment analysis-based design of the three-way equal-rigidity rubber shock absorber of the platform type inertial navigation system, decreasing the preparation of experiment samples, saving the cost and shortening the design period.

Description

technical field [0001] The invention relates to a design method of a shock absorber of a platform type inertial navigation system, in particular to a design method of a three-way equal stiffness rubber shock absorber of a platform type inertial navigation system. Background technique [0002] Since the load on the platform inertial navigation system may be a three-way broadband random load in space, if the natural frequency of the linear vibration of the vibration damping system in the three main vibration directions orthogonal to each other in space is the same (that is, the three-way equal stiffness) can be effective Reduce the resonance bandwidth and improve the vibration reduction efficiency of the vibration reduction system for random vibration. [0003] Different types of platform inertial navigation systems need to design different types of three-way equal-stiffness rubber shock absorbers due to their different structures and operating environments. In the design pro...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 张鹏费庆国李彦斌吴邵庆
Owner SOUTHEAST UNIV
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