中国机械工程
中國機械工程
중국궤계공정
CHINA MECHANICAl ENGINEERING
2014年
21期
2853-2859
,共7页
等效源法%声传递向量%不规则封闭空腔%面板声学贡献度
等效源法%聲傳遞嚮量%不規則封閉空腔%麵闆聲學貢獻度
등효원법%성전체향량%불규칙봉폐공강%면판성학공헌도
equivalent source method%acoustic transfer vector%irregular enclosure%panel acous-tic contribution
提出了一种用于封闭空腔内声场的计算方法---等效声传递向量法。采用位于腔体表面附近的若干虚构声源的叠加声场来等效由结构振动形成的封闭空腔声场，通过匹配振动结构表面上的法向振速获得虚构声源的源强，建立起结构表面的法向振速与腔体内场点声压的联系，并推导了结构面板声学贡献度的计算公式。计算过程避免了边界元法中复杂的数值计算和奇异积分的处理，提高了计算效率。仿真结果证明了该方法的正确性和有效性。
提齣瞭一種用于封閉空腔內聲場的計算方法---等效聲傳遞嚮量法。採用位于腔體錶麵附近的若榦虛構聲源的疊加聲場來等效由結構振動形成的封閉空腔聲場，通過匹配振動結構錶麵上的法嚮振速穫得虛構聲源的源彊，建立起結構錶麵的法嚮振速與腔體內場點聲壓的聯繫，併推導瞭結構麵闆聲學貢獻度的計算公式。計算過程避免瞭邊界元法中複雜的數值計算和奇異積分的處理，提高瞭計算效率。倣真結果證明瞭該方法的正確性和有效性。
제출료일충용우봉폐공강내성장적계산방법---등효성전체향량법。채용위우강체표면부근적약간허구성원적첩가성장래등효유결구진동형성적봉폐공강성장，통과필배진동결구표면상적법향진속획득허구성원적원강，건립기결구표면적법향진속여강체내장점성압적련계，병추도료결구면판성학공헌도적계산공식。계산과정피면료변계원법중복잡적수치계산화기이적분적처리，제고료계산효솔。방진결과증명료해방법적정학성화유효성。
Equivalent acoustic transfer vector method for the analysis of sound field in irregular enclosure was developed.The sound field formed by the complex vibrating structure was replaced by the superposition of a series of virtual sources near the surface of the cavity,and the strength of those sources was obtained by matching the normal velocity on the surface.The connection between the normal velocity on the surface and the sound pressure at the interested point in the cavity was estab-lished,and the calculation formula of panel acoustic contribution was deduced.Compared with bound-ary element method,complicated numerical calculation and the singular integrals were avoided in the proposed method,and the calculation efficiency was improved.The simulation results show that the proposed method is correct and effective.
