Dynamic Characteristics Study with Multidegree-of-Freedom Coupling in TBM Cutterhead System Based on Complex Factors

<table class="table-group" width="800px"><tr class="fig-image" id="a"><td><img alt="635809.fig.0012a" src="https://static-preview.hindawi.com/articles/mpe/volume-2013/635809/figures/635809.fig.0012a.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(a) </b>Frequency responses in <svg height="15.95" id="M215" style="vertical-align:-2.55255pt" version="1.1" viewbox="0 0 7.8249998 15.95" width="7.8249998" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,12.713)"><path d="M430 689q0 -42 -40.5 -66t-86.5 -28q-79 -65 -137 -176t-58 -211q0 -52 21 -79t60 -41q25 -9 62 -18q77 -20 77 -89q0 -34 -22 -69.5t-42 -54.5t-50 -44l-22 23q60 63 60 111q0 45 -50 55q-42 8 -67 18q-55 20 -83.5 56t-28.5 105q0 113 68 224t164 194q-52 1 -86 23.5
t-34 51.5q0 20 21 40t53 30l17 -12q-13 -17 -13 -36t19 -38.5t58 -22.5q85 65 123 65q17 0 17 -11z" id="x1D701"></path></g>
</svg>direction</td></tr></table></td></tr><tr class="fig-image" id="b"><td><img alt="635809.fig.0012b" src="https://static-preview.hindawi.com/articles/mpe/volume-2013/635809/figures/635809.fig.0012b.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(b) </b>Frequency responses in <svg height="12.175" id="M216" style="vertical-align:-3.56265pt" version="1.1" viewbox="0 0 8.5249996 12.175" width="8.5249996" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,7.675)"><path d="M471 401q0 -32 -14 -91l-83 -376q-30 -146 -21 -180l-7 -15q-22 0 -47.5 23.5t-25.5 40.5q0 49 53 271l53 224q4 18 6.5 31t3.5 22.5t1 15t-2 9t-4.5 4.5t-6.5 1q-31 0 -100.5 -63.5t-126.5 -145.5q-16 -53 -40 -163q-48 -11 -74 -21l-7 8l82 341q9 36 -4 36
q-8 0 -28.5 -14t-38.5 -32l-17 22q41 43 85 71t66 28q23 0 23 -39q0 -19 -10 -64l-24 -103h2q77 101 201 182q37 24 74 24q31 0 31 -47z" id="x1D702"></path></g>
</svg> direction</td></tr></table></td></tr><tr class="fig-image" id="c"><td><img alt="635809.fig.0012c" src="https://static-preview.hindawi.com/articles/mpe/volume-2013/635809/figures/635809.fig.0012c.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(c) </b>Frequency responses in <svg height="11.6" id="M217" style="vertical-align:-0.0pt" version="1.1" viewbox="0 0 12.375 11.6" width="12.375" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,11.537)"><path d="M698 636l-541 -596q60 -5 176 -5q91 0 138.5 5t69.5 24q44 36 85 124l29 -15q-38 -125 -64 -173h-559l-9 16l545 598h-182q-81 0 -109 -8t-48 -31q-26 -29 -55 -103l-29 3q23 86 42 200h22q11 -16 21 -20.5t34 -4.5h428z" id="x1D44D"></path></g>
</svg> direction</td></tr></table></td></tr></table>

<table>Frequency responses of the cutterhead pieces.</table>

Mathematical Problems in Engineering

fig12

Figure 12

Figure 12: Dynamic Characteristics Study with Multidegree-of-Freedom Coupling in TBM Cutterhead System Based on Complex Factors 