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下穿客运专线的关键问题是最大限度减小振动和干扰,提出某高架桥下穿客运专线施工方案,显著减少对铁路的影响,并确保铁路运营的安全。 相似文献
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通过对暖通空调设计中的噪声与振动通病防治进行了讨论分析,首先探讨了暖通空调设计中的噪声与振动问题,随后结合相应问题,分析了暖通空调设计中的噪声与振动防治措施,并结合实际案例,对暖通空调噪声与振动防治应用实践进行了讨论,最后提出了一些暖通空调设计中的噪声与振动防治注意的暖通空调设计中的噪声与振动防治注意的问题,希望能够为相关研究提供一定的参考。 相似文献
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对于换热管受横向流激振产生振动的问题,考虑流体阻尼与管道变形的影响,得到了关于振动速度的高阶偏微分方程。以弹簧-质量系统作为方程的特解入手,分析了热管振动方程解的形式和对应的动力学特性,并作出对应的相轨线方程,从相平面的角度出发,进一步得出换热管受流体激振的稳定性条件。 相似文献
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The backscattering signal, which arises from the pulsed laser traveling through water, has limited the lidar system sensitivity and underwater target contrast. The transmitted optical carrier is modulated to be ultrashort pulsed laser and it is effective to suppress the backscattering to adopt the coherent detection technology by identifying the modulation envelope. A nonstationary light field is formed in seawater by the ultrashort pulsed laser. The inherent relationship between the nonstationary light field formed by modulated lidar and the stationary light field formed by conventional lidar was discussed and the backscattering light model of the stationary light field for the ultrashort pulsed laser was proposed. The backscattering signal in modulated lidar system was processed and analyzed in the frequency domain on the basis of the model. 相似文献
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