Topology optimization design of excavator working device based on equivalent static loads

Area of Science:

• Mechanical Engineering
• Structural Optimization
• Robotics

Background:

• Excavator working devices require both dynamic performance and static strength.
• Traditional optimization methods struggle to balance these dual requirements.
• Dynamic analysis of complex machinery is crucial for performance.

Purpose of the Study:

• To develop a dynamic topology optimization method for excavator working devices.
• To address limitations in balancing dynamic topology optimization and static strength.
• To improve the design efficiency and structural integrity of excavator arms.

Main Methods:

• Constructed a rigid-flexible coupling dynamic model for excavator working devices.
• Applied the P-norm method to convert local stress constraints to global constraints.
• Established a topology optimization model minimizing arm flexibility under stress and volume constraints.
• Utilized the equivalent static loads method for dynamic topology optimization.

Main Results:

• Achieved a 24.63% reduction in excavator arm mass.
• Increased maximum stress by only 5.26%, remaining within material limits.
• Successfully redesigned the arm's topological structure considering manufacturability.

Conclusions:

• The proposed dynamic topology optimization method effectively balances dynamic and static requirements.
• The method offers significant mass reduction without compromising structural safety.
• This approach enhances the design of excavator working devices for improved performance and efficiency.