噪声与振动控制
譟聲與振動控製
조성여진동공제
NOISE AND VIBRATION CONTROL
2010年
2期
62-65
,共4页
振动与波%结构振动%内声场%城市轨道车辆%有限元%边界元
振動與波%結構振動%內聲場%城市軌道車輛%有限元%邊界元
진동여파%결구진동%내성장%성시궤도차량%유한원%변계원
vibration and wave%structural vibration%interior noise%urban rail passenger vehicle%finite element method%boundary element method
采用有限元法结合边界元法研究按额定速度行驶的城市轨道客车车内噪声特性.车辆行驶工况下车身所受到的结构激励力以车底架上的载荷谱描述,采用有限元计算该激励下车体表面的振动速度,并采用边界元法预报相应的车内声场.最后,分析车身表面不同位置对声场最大声压级点的贡献量及其随频率和空间分布的规律.
採用有限元法結閤邊界元法研究按額定速度行駛的城市軌道客車車內譟聲特性.車輛行駛工況下車身所受到的結構激勵力以車底架上的載荷譜描述,採用有限元計算該激勵下車體錶麵的振動速度,併採用邊界元法預報相應的車內聲場.最後,分析車身錶麵不同位置對聲場最大聲壓級點的貢獻量及其隨頻率和空間分佈的規律.
채용유한원법결합변계원법연구안액정속도행사적성시궤도객차차내조성특성.차량행사공황하차신소수도적결구격려력이차저가상적재하보묘술,채용유한원계산해격려하차체표면적진동속도,병채용변계원법예보상응적차내성장.최후,분석차신표면불동위치대성장최대성압급점적공헌량급기수빈솔화공간분포적규률.
In this paper, the interior noise characteristics of an urban rail passenger vehicle traveling at rated velocity are studied by using the combination of finite element method and boundary element method.The structural excitation forces acting on the vehicle's body are described by the load spectra at the vehicle's bottom frame.The body surface's vibration velocities are calculated by means of finite element method, while the interior noise field is predicted by using boundary element method.Finally, the contributions of the different portions of the body's surfaces to the maximum SPL field points are analyzed, and their features versus frequency and space are also analyzed.
