摘要
通过对爆破震动信号时能密度曲线的积分值TEDI(Integral of the Time-Energy Density)与爆破震动三要素(即震动的幅值、频率和持时)进行关联分析,创造性地提出了用TEDI值作为评估爆破震动效应强弱的定量指标,初步建立了用TEDI值作为考核指标的爆破震动损伤统一安全判据。当TEDI 15时,爆破震动对结构体将造成危害,并用实例验证了该判据的可行性和可靠性。该判据较之以往的“独立阈值理论”以及结合震动主频的峰值强度判据来说,更能全面地反映爆破震动危害的本质。
By analyzing the relevancy of the integral of the time-energy density(TEDI) to the three factors of blast vibration(amplitude,frequency and duration of blast vibration),the quantitative index to evaluate strength or feebleness of blast vibration effect by the use of TEDI is put forword,and a preliminary unified criterion for damage induced by blast vibration is constituted.When TEDI reaches 15,blast vibration begins to damage the constructions,and the feasibility and reliability of the criterion are validated by several instances.This criterion reflects the essence of blast vibration damage more comprehensively than the theory of independent threshold value and its related safety criterion considering the effect of frequency.
出处
《振动与冲击》
EI
CSCD
北大核心
2007年第2期124-127,共4页
Journal of Vibration and Shock
基金
国家自然科学基金资助项目(50678028)
湖南省自然科学基金资助项目(05JJ30075)
