Particlevelocitymodelsoflongitudinalandtransversalwaves inthenearfieldofsealedexplosions
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摘要: 基于第四纪黄土层小爆炸当量系列封闭爆炸的近场地震观测数据,对纵波和横波分别进行了分析 处理,获得了纵波和横波的质点速度,确定了纵波和横波质点速度现有模型的参数。综合分析了有代表性的 3个模型,得出现存模型本质上的差别在于爆炸当量指数不同。对此提出了双极模型,并介绍了该模型参数 的计算方法。对这几种模型在描述观测和实测数据方面的残差进行了比较。结果表明,双极模型反演数据与 观测数据之间的残差平方和最小,而传统模型中最好的效果仅是接近双极模型。Abstract: Theseismicdataoflow-yieldexplosionearthquakeswhichtookplaceintheQuaternaryperiodsoilwerebasedontocalculatetheparticlevelocitiesofthelongitudinalan transversalwavesand determinetheparametersfortheexistentmodels.Thethreerepresentativemodelsweresynthetically analyzed.Itdisplaysthatthedifferenceoftheexistentmodelsliesindifferentyieldexponents.Accordingly, adouble-extrememodelwasproposedandthecalculationmethodofthemodelparameters wasintroducedindetail.Comparisonofthesemodelsshowsthatthedatacalculatedbythedouble-extrememodelisthemostconsistentwiththerealobservationandtheamplitudeerrorbetweenthemis thesmallest.Thebestresultscalculatedbythetraditionalvelocitymodelsonlyapproachthesecalculatedbythedouble- extrememodel.
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Key words:
- mechanicsofexplosion /
- particlevelocity /
- sealedexplosion /
- near-fieldearthquake /
- doubleextrememodel
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