Study on impact dynamic characteristics of semi-autogenous mill liner based on improved multivariable method

Area of Science:

• Mechanical Engineering
• Materials Science
• Tribology

Background:

• The impact resistance of semi-autogenous mill liners is critical for system reliability.
• Understanding the complex dynamics of collisions between liners and abrasive media is essential for performance optimization.

Purpose of the Study:

• To develop and validate an improved multivariable method for analyzing the impact dynamics of mill liners and abrasive media.
• To investigate the influence of material and motion parameters on collision dynamics.

Main Methods:

• An improved multivariable method combining manifold element and modal coordinates was developed.
• Lagrange's method was used to establish impact dynamic equations.
• A collision test rig was constructed for experimental validation.

Main Results:

• Parameter analysis revealed key influences of Poisson's ratio, initial velocity, abrasive radius, and liner thickness on stress, displacement, velocity, and acceleration.
• The improved method demonstrated increased modeling efficiency and solving accuracy compared to traditional approaches.

Conclusions:

• The improved multivariable method provides a more accurate and efficient approach to modeling mill liner-abrasive media collisions.
• Findings offer a theoretical basis for optimizing liner structure and enhancing system service life.