CAJ | 학술논문

应用SYSNOISE软件建立列车-隧道-隧道内壁吸音板结构的二维边界元模型，研究隧道内壁吸声结构不同铺设方案下的降噪效果。根据高速铁路列车通过时隧道内壁吸声结构不同铺设面积、铺设位置等因素，分析其对列车通过时噪声的降噪效果，并综合考虑工程经济性等因素，计算4个较为典型的隧道内壁吸声结构的铺设方案。计算结果表明：在隧道内壁全部铺设吸声材料的情况下，铺设隧道吸声结构对隧道内声压级的降噪效果约为14.3dB。随着隧道内壁吸声材料铺设面积的增加，隧道内的降噪效果越好。在计算选取的4个方案中，内壁整体铺设方案降噪效果最佳，内壁部分铺设方案降噪效果最差，两者的组合方案降噪效果适中，实际工程应用中应综合各方面因素对降噪方案进行选取。
응용SYSNOISE연건건립열차-수도-수도내벽흡음판결구적이유변계원모형，연구수도내벽흡성결구불동포설방안하적강조효과。근거고속철로열차통과시수도내벽흡성결구불동포설면적、포설위치등인소，분석기대열차통과시조성적강조효과，병종합고필공정경제성등인소，계산4개교위전형적수도내벽흡성결구적포설방안。계산결과표명：재수도내벽전부포설흡성재료적정황하，포설수도흡성결구대수도내성압급적강조효과약위14.3dB。수착수도내벽흡성재료포설면적적증가，수도내적강조효과월호。재계산선취적4개방안중，내벽정체포설방안강조효과최가，내벽부분포설방안강조효과최차，량자적조합방안강조효과괄중，실제공정응용중응종합각방면인소대강조방안진행선취。
A two-dimensional boundary element model for train, tunnel and sound-absorbing board structure on the tunnel surface is established with the software SYSNOIE to evaluate different design proposals‘ noise reduction effects in tunnel. In this research, noise reduction effects are calculated while a high-speed train is running through the tunnel with sound-absorbing material on the surface, and several influencing factors such as material area and location are taken into account. Four typical material installation proposals are designed and calculated. The results show that the installation of sound-absorbing material may reduce about 14. 3 dB if only the entire tunnel surface is covered with sound-absorbing material. The more the tunnel surface is covered with sound absorbing material, the better the noise reduction effect. Of the four typical installation proposals, the one with full coverage is the best in noise reduction, while the one with partial coverage the worst. The combination of the two shows the intermediate result. Design proposals shall be carefully selected for practical application with various factors considered.