Modal and Harmonic Response Investigation of Excavator Walkways Using Finite Element Method

Abstract

Reliability, performance, and safety requirements in construction machinery necessitate designs that are not only functional but also structurally robust. Meeting the targeted strength criteria under challenging operating conditions highlights the need for multidisciplinary engineering evaluations. The growing demand for excavators further emphasizes the importance of structural integrity. While primary components such as attachments, main chassis elements, and operator cabins are typically prioritized, certain auxiliary structures integrated into the machinery to meet operational needs must also be evaluated with the same engineering rigor. Walkways, which provide operators access to various machine areas, must meet both safety and functionality requirements, ensuring adequate structural strength. In this context, the boundary conditions affecting the design, particularly those related to dynamic loading, must be examined in detail. Vibrations originating from components such as the engine, hydraulic pump, attachments, and ground interaction should be thoroughly assessed for their impact on the structure. In this study, the natural frequencies, mode shapes, and mass participation factors of a walkway designed for a high-tonnage excavator were analyzed. The dynamic response of the structure was evaluated across a frequency spectrum to identify critical deformation behaviors. Finite Element Method (FEM) was used in the analysis, conducted via MSC Patran software. The results provide a foundation for advanced structural assessments, contribute to the understanding of the walkway’s dynamic performance under real conditions.

Keywords

• Earth Moving Machinery
• Finite Element Method
• Harmonic Frequency Response
• Modal Analysis

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