Collision damping device with nonlinear rigidity

Abstract

The invention aims to provide a collision damping device with nonlinear stiffness, which comprises a packaging shell, an upper mass layer, a lower mass layer, an upper spring layer and a lower spring layer, a packaging cover plate is fixed at the upper end of the packaging shell to form a closed space, the lower mass layer is arranged in the closed space, the upper mass layer is arranged in the lower mass layer, and the lower spring layer is arranged in the lower mass layer. An upper-layer spring is arranged between the upper-layer mass and the lower-layer mass, a lower-layer spring is arranged between the lower-layer mass and the packaging shell, and the packaging shell is connected with a to-be-damped structure through a mounting bolt. Energy can be quickly absorbed and dissipated from a structure to be subjected to vibration reduction, and therefore the dynamic response of a system is reduced. The device has the advantages of being simple in structure, easy to maintain, easy to adjust and change system parameters, wide in application range and the like, particularly has obvious advantages in the aspect of vibration reduction of structures such as thin plates and thin shells, and has good engineering application prospects.

Description

technical field [0001] The invention relates to a vibration damping device, in particular to a vibration damping device with nonlinear stiffness. Background technique [0002] Whether in life or engineering, vibration, a special form of motion, is ubiquitous. In many cases, vibration often has a negative impact on people's daily life and the working operation of machines. As early as the 19th century, bridges collapsed due to vibrations. Also in the field of engineering, such as various types of rotating machinery, once the rotor part is uneven during manufacture and eccentric mass is generated, the machine will always bear the action of periodic simple harmonic force when it is working, which will deteriorate the working conditions of the machine and seriously Sometimes it causes machine damage or even a major accident that threatens personal safety. [0003] Passive vibration control strategies usually have the advantages of not requiring external energy, simple structu...

AI Technical Summary

Problems solved by technology

[0008] To sum up, the use of damping to achieve energy dissipation has the problem that the damping parameters are difficult to design, and the use of collision between the structure to be damped and the nonlinear vibration absorber to dissipate energy will lead to local damage to the structure to be damped, especially It is especially obvious for structures such as thin plates and shells

At the same time, the collision between the structure to be damped and the collision nonlinear vibration damping device will also cause the acceleration response of the structure to be damped to be too large, which can easily cause structural damage

Images