The sloshing in a group of rigid cylindrical tanks with baffles and on soil foundation under horizontal excitation is studied analytically.The solutions for the velocity potential are derived out by the liquid subdoma...The sloshing in a group of rigid cylindrical tanks with baffles and on soil foundation under horizontal excitation is studied analytically.The solutions for the velocity potential are derived out by the liquid subdomain method.Equivalent models with mass-spring oscillators are established to replace continuous fluid.Combined with the least square technique,Chebyshev polynomials are employed to fit horizontal,rocking and horizontal-rocking coupling impedances of soil,respectively.A lumped parameter model for impedance is presented to describe the effects of soil on tank structures.A mechanical model for the soil-foundation-tank-liquid-baffle system with small amount of calculation and high accuracy is proposed using the substructure technique.The analytical solutions are in comparison with data from reported literature and numerical codes to validate the effectiveness and correctness of the model.Detailed dynamic properties and seismic responses of the soil-tank system are given for the baffle number,size and location as well as soil parameter.展开更多
玛日当沟钨矿床位于布喀达坂—青海南山成矿省同德—泽库印支期汞、砷、铜、铅、锌、金(锑、钨、铋、锡)成矿带内,是近年来发现的、受北北西向断裂构造控制的大型钨矿床。通过对该矿床地质特征、成晕元素共生组合的研究,基于格里戈良提...玛日当沟钨矿床位于布喀达坂—青海南山成矿省同德—泽库印支期汞、砷、铜、铅、锌、金(锑、钨、铋、锡)成矿带内,是近年来发现的、受北北西向断裂构造控制的大型钨矿床。通过对该矿床地质特征、成晕元素共生组合的研究,基于格里戈良提出的分带指数计算方法获得了矿体原生晕轴向分带序列为Cu→Sb→Mo→Au→Pb→Zn→Ag→W→Bi,总体上与Beus and Grigorian总结的多金属矿床标准轴向分带序列基本一致。另外,基于分带指数建立了深部矿体预测模型,其预测评价指标(Cu×Sb×Mo)_D/(Ag×W×Bi)_D的自然对数与深度之间具有较好的线性关系,且该指标随深度的增加而有规律地降低,可作为深部矿体预测的有效指标。展开更多
基金financially supported by the National Natural Science Foundation of China(Grant Nos.51978336 and 11702117)the Science and Technology Plan Project of Department of Communications of Zhejiang Province(Grant No.2021051)Nantong City Social Livelihood Science and Technology Project(Grant No.MS22022067).
文摘The sloshing in a group of rigid cylindrical tanks with baffles and on soil foundation under horizontal excitation is studied analytically.The solutions for the velocity potential are derived out by the liquid subdomain method.Equivalent models with mass-spring oscillators are established to replace continuous fluid.Combined with the least square technique,Chebyshev polynomials are employed to fit horizontal,rocking and horizontal-rocking coupling impedances of soil,respectively.A lumped parameter model for impedance is presented to describe the effects of soil on tank structures.A mechanical model for the soil-foundation-tank-liquid-baffle system with small amount of calculation and high accuracy is proposed using the substructure technique.The analytical solutions are in comparison with data from reported literature and numerical codes to validate the effectiveness and correctness of the model.Detailed dynamic properties and seismic responses of the soil-tank system are given for the baffle number,size and location as well as soil parameter.
文摘玛日当沟钨矿床位于布喀达坂—青海南山成矿省同德—泽库印支期汞、砷、铜、铅、锌、金(锑、钨、铋、锡)成矿带内,是近年来发现的、受北北西向断裂构造控制的大型钨矿床。通过对该矿床地质特征、成晕元素共生组合的研究,基于格里戈良提出的分带指数计算方法获得了矿体原生晕轴向分带序列为Cu→Sb→Mo→Au→Pb→Zn→Ag→W→Bi,总体上与Beus and Grigorian总结的多金属矿床标准轴向分带序列基本一致。另外,基于分带指数建立了深部矿体预测模型,其预测评价指标(Cu×Sb×Mo)_D/(Ag×W×Bi)_D的自然对数与深度之间具有较好的线性关系,且该指标随深度的增加而有规律地降低,可作为深部矿体预测的有效指标。
