中国机械工程
中國機械工程
중국궤계공정
CHINA MECHANICAl ENGINEERING
2014年
15期
2124-2129
,共6页
陈剑%蒋丰鑫%肖悦
陳劍%蔣豐鑫%肖悅
진검%장봉흠%초열
车内噪声%载荷识别%声学传递向量(ATV)%边界元法%面板贡献量%形貌优化
車內譟聲%載荷識彆%聲學傳遞嚮量(ATV)%邊界元法%麵闆貢獻量%形貌優化
차내조성%재하식별%성학전체향량(ATV)%변계원법%면판공헌량%형모우화
vehicle inner noise%load identification%ATV(acoustics transfer vector)%BE(bounda-ry element)method%panel contribution%topography optimization
以某挖掘机驾驶室为例，建立结构有限元与声学边界元模型，基于频域逆矩阵方法求解工况下的激励载荷，利用基于模态的强迫响应法求得该激励下驾驶室振动速度响应。以此速度响应为边界条件，将声学传递向量(ATV)法与边界元法相结合计算驾驶员右耳处的声压，并进行了试验验证。对峰值频率处驾驶室面板声学贡献量进行计算，确认贡献显著的板件，对相应板件进行形貌优化和添加阻尼处理，结果表明，驾驶室内声压在对应峰值位置有较明显的下降。
以某挖掘機駕駛室為例，建立結構有限元與聲學邊界元模型，基于頻域逆矩陣方法求解工況下的激勵載荷，利用基于模態的彊迫響應法求得該激勵下駕駛室振動速度響應。以此速度響應為邊界條件，將聲學傳遞嚮量(ATV)法與邊界元法相結閤計算駕駛員右耳處的聲壓，併進行瞭試驗驗證。對峰值頻率處駕駛室麵闆聲學貢獻量進行計算，確認貢獻顯著的闆件，對相應闆件進行形貌優化和添加阻尼處理，結果錶明，駕駛室內聲壓在對應峰值位置有較明顯的下降。
이모알굴궤가사실위례，건립결구유한원여성학변계원모형，기우빈역역구진방법구해공황하적격려재하，이용기우모태적강박향응법구득해격려하가사실진동속도향응。이차속도향응위변계조건，장성학전체향량(ATV)법여변계원법상결합계산가사원우이처적성압，병진행료시험험증。대봉치빈솔처가사실면판성학공헌량진행계산，학인공헌현저적판건，대상응판건진행형모우화화첨가조니처리，결과표명，가사실내성압재대응봉치위치유교명현적하강。
The structural FE(finite element)model and acoustic BE model of one excavator cab were established.The excitation loads of the cab in working condition were solved on the basis of in-verse matrix method in frequency domain.Vibration velocity response of vehicle cab was obtained through modal-based forced response method.Taking the above velocity as the boundary condition, the sound pressure at driver's right ear was calculated by combining BE method with ATV method, and the results were verified by tests.The panel contribution most to the peek sound pressure was found out by panel contribution analysis and optimized through topography optimization method and adding damping treatment.And the result shows a significant decrease of peak value of the interior sound pressure level of the cab.
