Vibration source analysis and structural optimization design of rotary table based on OTPA.

Area of Science:

• Mechanical Engineering
• Mining Engineering
• Vibration Analysis

Background:

• Cantilever roadheaders experience significant vibration during coal cutting due to rock properties and environment.
• The rotary table is a critical stress component, influencing cutting efficiency and stability.
• Understanding and mitigating rotary table vibration is crucial for operational reliability and longevity.

Purpose of the Study:

• To establish a spatial mechanical model for analyzing rotary table vibration in cantilever roadheaders.
• To identify vibration sources, their contributions, and simulate the rotary table's vibration characteristics.
• To optimize the rotary table design for reduced stress, deformation, and improved fatigue life.

Main Methods:

• Spatial force analysis and calculation to establish a mechanical model and determine load variations.
• Path transfer analysis using vibration data to simulate synthetic vibration and identify sources.
• Frequency domain analysis for fatigue life prediction and response surface methodology for multi-objective optimization.

Main Results:

• A validated theoretical model for rotary table vibration response was developed.
• Key vibration sources and their contributions to the rotary table's hinge ear were identified.
• Optimized design reduced maximum stress by 15.82% and maximum deformation by 24.70%.

Conclusions:

• The optimized rotary table design significantly enhances operational stability and adaptability to cutting conditions.
• Improved design leads to increased service life and operational reliability of the cantilever roadheader.
• This research contributes to the theoretical understanding of rotary table vibration and practical improvements in mining operations.