Kaune W T, McCreary F A
Bioelectromagnetics. 1985;6(3):209-20. doi: 10.1002/bem.2250060302.
Power-frequency electric fields are strongly perturbed in the vicinity of human beings and experimental animals. As a consequence, the extrapolation of biological data from laboratory animals to human-exposure situations cannot use the unperturbed exposure field strength as a common exposure parameter. Rather, comparisons between species must be based on the actual electric fields at the outer surfaces of and inside the bodies of the subjects. Experimental data have been published on surface and internal fields for a few exposure situations, but it is not feasible to characterize experimentally more than a small fraction of the diverse types of exposures which occur in the laboratory and in the field. A predictive numerical model is needed, one whose predictions have been verified in situations where experimental data are available, and one whose results can be used with confidence in new exposure situations. This paper describes a numerical technique which can be used to develop such a model, and it carries out this development for a test case, that of a homogeneous right-circular cylinder resting upright on-end on a ground plane and exposed to a vertical, uniform, 60-Hz electric field. The accuracy of the model is tested by comparing short-circuit currents and induced current densities predicted by it to measured values: Agreement is good.
工频电场在人类和实验动物附近会受到强烈干扰。因此，将实验室动物的生物学数据外推至人类暴露情况时，不能将未受干扰的暴露场强作为通用的暴露参数。相反，物种之间的比较必须基于受试者体表和体内的实际电场。已发表了一些关于几种暴露情况下表面和内部电场的实验数据，但要通过实验来表征实验室和现场出现的各种暴露类型中的一小部分以上是不可行的。需要一个预测性数值模型，其预测在有实验数据的情况下已得到验证，并且其结果能够在新的暴露情况下放心使用。本文描述了一种可用于开发此类模型的数值技术，并针对一个测试案例进行了开发，该测试案例是一个均质的右旋圆柱体直立于接地平面上并暴露于垂直、均匀的60赫兹电场中。通过将模型预测的短路电流和感应电流密度与测量值进行比较来测试模型的准确性：结果吻合良好。
