Damping shock absorber and vibration reduction design method

A method for designing vibration reduction of a piping system, comprising:

• performing vibration test for a piping system to be treated in a working state to determine a main frequency band of a vibration distribution and a frequency range of a sweep test of the piping system;
• performing a modal dynamics simulation of an established piping system model according to a type of the piping system to obtain a modal mode shape of the piping system;
• determining an installation position of a shock absorber model in the piping system model according to the obtained main frequency band of the vibration distribution of the piping system and the modal mode shape of the piping system, and setting the shock absorber model in the installation position to obtain a vibration damping system model;
• and
• performing simulation on the vibration damping system model by finite element and discrete element coupling according to the frequency range of the sweep test to determine an optimal value of each configuration parameter of the shock absorber model, and designing vibration reduction based on the optimal value of the configuration parameter.

A damping shock absorber, comprising:

• a main body sleeved around an outer periphery of a rotary shaft, a plurality of chambers disposed in the main body, and damping particles filled in the chambers, wherein the chambers are disposed in the main body in a regular arrangement:
• wherein the chambers are spaced with each other and arranged around the outside of the rotary shaft, the main body is concave inward from positions near both lateral end surfaces to form two layers of the chambers with the same size along an axial direction of the rotary shaft, the two layers of chambers arranged along the axial direction of the rotary shaft are symmetrical along the axial direction of the rotary shaft and mutually independent;
• and
• at least two layers of the chambers are arranged in a radial direction of the rotary shaft from inside out, the chambers of different layers have different sizes, and the chambers of an outer layer have a size greater than that of the chambers of an inner layer, the chambers can accommodate damping particles of different sizes due to different arcs and distances from an inner diameter, and the damping particle material, particle size and filling rate of the chambers of different internal space are also different.