Research on Aerodynamic Noise Reduction for High-Speed Trains

<table class="table-group" id="tab7"><tr><td><table class="table"><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr class="thead"><td class="align_left">Evaluation index</td><td class="align_center">Qb1</td><td class="align_center">Qb2</td><td class="align_center">Qb3</td><td class="align_center">Qb4</td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td class="align_left"><span style="width: 25.0171ptpx;"><svg height="11.9316pt" id="M172" style="vertical-align:-3.2957pt" version="1.1" viewbox="-0.0498162 -8.6359 25.0171 11.9316" width="25.0171pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M541 160L512 170C485 116 462 88 439 67C411 41 376 35 318 35C272 35 238 37 224 48C207 61 205 85 212 121L290 533C305 611 308 615 391 622L397 650H139L133 622C217 615 221 612 206 533L126 118C111 41 103 34 23 26L17 0H474C489 31 528 124 541 160Z" id="g113-77"></path><glyph.data ascent="3473" 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class="align_center"><b>83.0</b></td><td class="align_center">86.1</td><td class="align_center">86.4</td><td class="align_center">85.7</td></tr><tr><td class="align_left"><span style="width: 21.7288ptpx;"><svg height="14.1101pt" id="M173" style="vertical-align:-5.4742pt" version="1.1" viewbox="-0.0498162 -8.6359 21.7288 14.1101" width="21.7288pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M541 160L512 170C485 116 462 88 439 67C411 41 376 35 318 35C272 35 238 37 224 48C207 61 205 85 212 121L290 533C305 611 308 615 391 622L397 650H139L133 622C217 615 221 612 206 533L126 118C111 41 103 34 23 26L17 0H474C489 31 528 124 541 160Z" id="g113-77"></path><glyph.data ascent="3473" descent="-2876" horiz-adv-x="553" vert-adv-y="553"></glyph.data></g><g transform="matrix(.0091,0,0,-0.0091,8.294,3.132)"><path d="M573 302C573 402 527 451 414 451C386 451 343 446 313 437L330 513L320 522C295 508 261 484 243 463L230 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3 396 6L434 170C468 234 598 383 650 383C668 383 676 369 664 319L609 90C593 23 600 -12 629 -12C654 -12 722 23 781 91Z" id="g50-110"></path><glyph.data ascent="3443" descent="-2856" horiz-adv-x="805" vert-adv-y="805"></glyph.data></g></svg></span></td><td class="align_center"><b>76.7</b></td><td class="align_center">80.0</td><td class="align_center">80.4</td><td class="align_center">79.7</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Comparison of the SPL indices for different bogie skirt board designs (dB(A)).

Shock and Vibration

tab7

Table 7

Table 7: Research on Aerodynamic Noise Reduction for High-Speed Trains 