Engineering Characteristics Analysis of Typhoon Wind Field Based on a Mesoscale Model

Abstract

In the current civil engineering field, the characteristics of typhoon wind field are chiefly studied through field measurements and simple numerical simulation of typhoon engineering model. This paper will bring in the sophisticated non-hydrostatic version 3.7 of American Pennsylvania State University (PSU) --- National Center for Atmospheric Research (NCAR) Fifth-Generation Mesoscale Model MM5 in meteorology to simulate typhoon in order to apply in disaster prevention and reduction of civil engineering. Taking the strong typhoon Wipha (0713) as a example, the quadrupled nesting grid with spacing of 27 km, 9 km, 3 km and 1 km in MM5 is applied to the typhoon to obtain the highresolution, three-dimensional wind field. Meanwhile the effectiveness and applicability of MM5 model are evaluated by the typhoon yearbook of China Meteorological Administration. Then the engineering characteristics of typhoon wind field in the boundary layer, such as horizontal wind speed and wind profile are presented and briefly analyzed from the respect of physics essence.