噪声与振动控制
譟聲與振動控製
조성여진동공제
NOISE AND VIBRATION CONTROL
2015年
3期
10-14,28
,共6页
江小州%焦洪林%杨刚%罗炯%赵悦%温泽峰
江小州%焦洪林%楊剛%囉炯%趙悅%溫澤峰
강소주%초홍림%양강%라형%조열%온택봉
声学%城际有轨电车%嵌入式轨道%结构振动%声辐射%参数优化
聲學%城際有軌電車%嵌入式軌道%結構振動%聲輻射%參數優化
성학%성제유궤전차%감입식궤도%결구진동%성복사%삼수우화
acoustics%inter-city streetcar%embedded track%structure vibration%noise radiation%parameters optimization
为了研究现有嵌入式轨道在某型城际有轨电车以60 km/h速度运营时的声振特性，分别建立嵌入式轨道结构的振动和声辐射计算模型，对嵌入式轨道振动声辐射特性进行分析，了解轨道振动规律与轮轨力激励的关系。轨道振动产生的声辐射水平在中频段总体很高，在低频和高频处水平较低。通过改变轨道结构尺寸，预测各个工况下嵌入式轨道的振动和声辐射。轨道的声振特性主要表现在20 Hz～160 Hz和160 Hz～5000 Hz两个频段内，辐射声功率级在200 Hz～1200 Hz频段内表现尤为突出，应该予以特别关注。若设现有嵌入式轨道板长度为l，高为h，承轨槽宽度为w，现有PVC管直径为d，相关的参数优化表明取轨道板长度为0.75 l，高为1.25 h，承轨槽宽度为w，PVC管直径为0.88 d或者1.15 d时，轨道结构具有最优的声振特性。相关的计算能为结构设计提供很好的指导。
為瞭研究現有嵌入式軌道在某型城際有軌電車以60 km/h速度運營時的聲振特性，分彆建立嵌入式軌道結構的振動和聲輻射計算模型，對嵌入式軌道振動聲輻射特性進行分析，瞭解軌道振動規律與輪軌力激勵的關繫。軌道振動產生的聲輻射水平在中頻段總體很高，在低頻和高頻處水平較低。通過改變軌道結構呎吋，預測各箇工況下嵌入式軌道的振動和聲輻射。軌道的聲振特性主要錶現在20 Hz～160 Hz和160 Hz～5000 Hz兩箇頻段內，輻射聲功率級在200 Hz～1200 Hz頻段內錶現尤為突齣，應該予以特彆關註。若設現有嵌入式軌道闆長度為l，高為h，承軌槽寬度為w，現有PVC管直徑為d，相關的參數優化錶明取軌道闆長度為0.75 l，高為1.25 h，承軌槽寬度為w，PVC管直徑為0.88 d或者1.15 d時，軌道結構具有最優的聲振特性。相關的計算能為結構設計提供很好的指導。
위료연구현유감입식궤도재모형성제유궤전차이60 km/h속도운영시적성진특성，분별건립감입식궤도결구적진동화성복사계산모형，대감입식궤도진동성복사특성진행분석，료해궤도진동규률여륜궤력격려적관계。궤도진동산생적성복사수평재중빈단총체흔고，재저빈화고빈처수평교저。통과개변궤도결구척촌，예측각개공황하감입식궤도적진동화성복사。궤도적성진특성주요표현재20 Hz～160 Hz화160 Hz～5000 Hz량개빈단내，복사성공솔급재200 Hz～1200 Hz빈단내표현우위돌출，응해여이특별관주。약설현유감입식궤도판장도위l，고위h，승궤조관도위w，현유PVC관직경위d，상관적삼수우화표명취궤도판장도위0.75 l，고위1.25 h，승궤조관도위w，PVC관직경위0.88 d혹자1.15 d시，궤도결구구유최우적성진특성。상관적계산능위결구설계제공흔호적지도。
In order to study the acoustic and vibration characteristics of an embedded track structure when inter-city streetcars traveling at 60 km/h in the track, a model for structure vibration and noise radiation analysis was developed. The vibration and noise radiation characteristics of the embedded track were analyzed, and the relation between the vibration law and the wheel-rail force excitation was learned. The results show that the radiated sound power level induced by the track vibration is much higher in the medium frequency range than that in the low and high frequency ranges. Changing the dimensions of the track structure, the vibration and noise radiation in different working conditions were forecasted. It is found that the acoustic and vibration characteristics of the track mainly perform in two frequency ranges of 20 Hz-160 Hz and 160 Hz-5 000 Hz. The radiation sound power level appears obviously high in the range of 200 Hz-1 200 Hz, which should be cared specially. Considering an existing track structure with the slabs of length l and height h, the rail supporting groove of width w and the PVC tube of diameter d, parameters optimization shows that the structure which has slabs with 0.75 l length and 1.25 h height, rail supporting groove of w width, and PVC tube of 0.88 d or 1.15 d diameter has optimal acoustic and vibration characteristics. The concerned results can guide the design of embedded track structures.
