Auto-body structure noise performance analysis and optimization research 大板車廂與骨架車廂在低噪聲電站上的應(yīng)用研究
Raft vibration-isolating unit is a device that can isolate the transmission of vibration and structure noise to the base effectively 浮筏隔振裝置是一種十分有效的減少機(jī)械振動(dòng)噪聲傳遞的裝置,如設(shè)計(jì)完美,能將振動(dòng)能量減少3540db。
The major noise sources of low-speed railway vehicles ( v 200km / h ) running in domestic existing lines are wheel-rail rolling and structure noise 我國既有線鐵路客車運(yùn)行速度多在200kmh以下,屬于低速運(yùn)行。運(yùn)行噪聲以輪軌噪聲和構(gòu)造物噪聲為主。
The major noise resources of high-speed railway vehicles ( v 200km / h ) are wheel-rail rolling noise, structure noise, aerodynamic noise and collector system noise 高速鐵道車輛(時(shí)速200kmh)的噪聲源主要是:輪軌噪聲、構(gòu)造物噪聲、集電系噪聲和空氣動(dòng)力性噪聲。
(3 ) study on the control mechanism of structure noise radiated from rotary machines, we build a common model of rotary machine structure noise analysis relied on the general characters of rotary machines . based on this model, we analyzed various influence factors to structure radiant noise using the union of revolution and numerical calculation method . we found that the joint stiffness between the rotor and the frame is the most sensitive parameter of structure radiant noise by calculating and analyzing 在旋轉(zhuǎn)機(jī)械結(jié)構(gòu)噪聲控制方面,根據(jù)旋轉(zhuǎn)機(jī)械的基本特征,建立了旋轉(zhuǎn)機(jī)械結(jié)構(gòu)噪聲分析的簡化模型,基于該模型利用解析與數(shù)值計(jì)算相結(jié)合的方法對(duì)結(jié)構(gòu)噪聲的各種影響因素進(jìn)行了分析,通過計(jì)算分析發(fā)現(xiàn),轉(zhuǎn)子與機(jī)體的連接剛度是機(jī)體結(jié)構(gòu)聲的最敏感參數(shù),同時(shí)各參數(shù)對(duì)結(jié)構(gòu)噪聲的影響具有互補(bǔ)性。
(3 ) study on the control mechanism of structure noise radiated from rotary machines, we build a common model of rotary machine structure noise analysis relied on the general characters of rotary machines . based on this model, we analyzed various influence factors to structure radiant noise using the union of revolution and numerical calculation method . we found that the joint stiffness between the rotor and the frame is the most sensitive parameter of structure radiant noise by calculating and analyzing 在旋轉(zhuǎn)機(jī)械結(jié)構(gòu)噪聲控制方面,根據(jù)旋轉(zhuǎn)機(jī)械的基本特征,建立了旋轉(zhuǎn)機(jī)械結(jié)構(gòu)噪聲分析的簡化模型,基于該模型利用解析與數(shù)值計(jì)算相結(jié)合的方法對(duì)結(jié)構(gòu)噪聲的各種影響因素進(jìn)行了分析,通過計(jì)算分析發(fā)現(xiàn),轉(zhuǎn)子與機(jī)體的連接剛度是機(jī)體結(jié)構(gòu)聲的最敏感參數(shù),同時(shí)各參數(shù)對(duì)結(jié)構(gòu)噪聲的影響具有互補(bǔ)性。