Zheng(2004) <The prediction to the hazard caused by weighting over great extent of roof in mine worked-out area> 討論了某石膏礦開采后形成的大量的間柱,隨著時間間柱強度不斷下降而發生破裂。為了解決這個問題,采用了強制塌陷配重技術來處理礦井采空區。
But it’s also teaching engineers to use lighter weight acoustical materials more efficiently.”As with all areas of vehicle development, simulation is increasingly integral to NVH mitigation.
wx_fmt=png" width="645"></p><p><strong>Baseline</strong></p><p><br></p><p><strong>Seal</strong></p><p><br></p><ul><li>AWPS(AreaWeighted Power Spectrum)面積加權功率譜,反映的是玻璃表面由于外流場激勵的噪聲源特性。