midas NFX nafem benchmark

NAFEMS Benchmark: Free square frame

Problem Description

Figure 1 shows a square frame model with no boundary conditions. The square frame is modeled with 4 bar elements for each arm. The natural frequencies of the lowest vibration modes except for the rigid-body modes are compared with the reference solutions given in the NAFEMS benchmarks. The vibration mode shapes are depicted in Figure 2.

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Figure 1. Free square frame model

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Figure 2. Vibration mode shapes

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