Design and analysis of demolition robot arm based on finite element method

Abstract

As a novel robot which mainly engages in the demolition and transformation of various concrete buildings, the demolition robot has developed rapidly in recent years. The impact force is mainly produced by the breaking hammer installed in the front end of the arm. As the most important part of a demolition robot, the boom arm is mainly composed of four parts including a supporting arm, a main arm, a fore arm, and a breaking hammer system. In this article, a mechanical model of the boom arm is established, and the finite element analysis obtaining the first four-order natural frequencies and modes is carried out in ANSYS Workbench. The results reveal that the resonation can be easily stimulated when a hydraulic breaking hammer is at the second-order frequency. The mounting block of the hydraulic breaking hammer, the hinge parts of the supporting arm, and the main arm are easily deformed or damaged in the Y direction by analyzing the deformation in three directions of the second-order mode. After the structure optimization, the vibration characteristics of the two parts are significantly enhanced, which provides a theoretical basis for optimizing the prototype and gives a reference in the experimental modes.

Structural and Modal Analysis Of Adapter Plates For Hydraulic Hammers And Skid Steers Under Real Work Condition

“…Crack formation as a result of the use of the hydraulic hammer was reported by Li et al (2019) [15] using Ansys Workbench which showed the behavior in the arm structure in an articulate system, when a hydraulic hammer is used. Fundamental parameters about the potential impact and crack formation were taken referentially from the registered real operations.…”

Autonomous Bionanorobots via a Cage-Shaped Silsesquioxane Vehicle for In Vivo Heavy Metal Detoxification

“…As one of the greatest inventions of mankind in the 20th century, great advances have been made in robotics since its inception in the early 1960s. Robots show great advantages over human beings for some jobs, particularly those that are tedious and repetitive, require high quality, or can cause harm to the human body. − For example, service robots can help with health care, cleaning, and security; underwater robots can salvage shipwrecks and lay cables; and engineering robots can go up mountains and into caves. , Biointelligent robots, nanoscale robots in particular, have recently attracted attention for disease treatment, and they have been developed as next-generation drug transporting devices that are sensitive to molecular stimuli. − A DNA nanorobot can be integrated into the drug delivery equipment for cancer therapeutics, driven by molecular triggers in vivo . , However, intelligent bionanorobots for in vivo heavy metal detoxification have almost not been reported.…”

“…1−4 For example, service robots can help with health care, cleaning, and security; 5 underwater robots can salvage shipwrecks and lay cables; 6 and engineering robots can go up mountains and into caves. 7,8 Biointelligent robots, nanoscale robots in particular, have recently attracted attention for disease treatment, and they have been developed as nextgeneration drug transporting devices that are sensitive to molecular stimuli. 9−18 A DNA nanorobot can be integrated into the drug delivery equipment for cancer therapeutics, driven by molecular triggers in vivo.…”

Dynamic Characteristics Analysis of Two-Beam Laser Welding Robot for Fulselage Panels

“…Building a 3D model of demolition robot in SolidWorks. Li et al [23] improves the layout of the structure and structural rigidity of the robot to ameliorate its dynamic characteristics according to the simulation results of modal analysis. Combining Experimental Modal Analysis (EMA) and Operational Modal Analysis (OMA), the robot frequency response functions as a function arm configuration are determined [24] .…”