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.

Figure 1. Free square frame model

Figure 2. Vibration mode shapes

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