Optimal Sensor Placement for Latticed Shell Structure Based on an Improved Particle Swarm Optimization Algorithm

Figure 6

The mode shapes and corresponding frequencies of the Schwedler latticed shell.

(a) 1st and 2nd mode, 𝑓≈ 6.33 Hz

(b) 3rd mode, 𝑓≈ 8.23 Hz

(c) 4th and 5th mode, 𝑓≈ 8.77 Hz

(d) 6th and 7th mode, 𝑓≈ 8.89 Hz