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body wave (從震心向各方輻射的)震波。

body wood

And the explicit finite difference method , the combining method of the central difference method and newmark s constant average acceleration method , and the transmitting boundary are used . by comparing the acceleration determined by the several methods of the displacements or velocities , a computing method of acceleration employed the one side difference of velocity is more practicality in this research . corresponding to normal incidence of the body waves , p waves or svwaves , and rayleigh surface waves , two two - dimensional finite difference programs are compiled to compu te the dynamic response of two - phase media 以土力學模型為基礎,利用以土骨架和孔隙流體的四個位移為基本未知量的數值方法去模擬二維飽水介質中的地震波傳播,采用了顯式差分方法(中心差分法和newmark常平均加速度法結合)和透射邊界,通過比較利用幾種差分格式求解的加速度結果,發現一種用速度單邊差分求解加速度的方法在本文研究中較為實用,分別編制了體波( p波或sv波) 、 rayleigh面波輸入時求解兩相介質動力響應的兩個二維數值分析程序。

In the second chapter , the basic theory and method of how to use far - field body - waves to invert for the seismic moment tensor were expatiated systematically . the moment tensor solutions of the march 25 , 1998 , antarctic plate earthquake ( mw = 8 . 1 , iris ) and the june 4 , 2000 , southern sumatra , indonesia , earthquake ( ms = 8 . 0 ) were inverted using teleseismic body waves recorded by long period seismograph stations of the iris global seismic network 并用iris全球地震臺網的遠場體波資料反演了1998年3月25日南極m _ w8 . 1 (據iris )地震的矩張量和2000年6月4日印度尼西亞蘇門答臘南部m _ s8 . 0地震的矩張量。

Abstract : propagation characteristics of r wave in a pavement structures are analysed in this paper . based on the propagation characteristics of r wave , the horizontal propagation wave is simulated by using r wave , the vertical propagation wave is also simulated by using body wave in calculating dynamic response of pavement structures . the availability and accuracy of dispersion curves measured by sasw in pavement structures is analysed by using the presented method used to calculate dynamic response 文摘:利用有限單元法分析了道路結構的r面波傳播特性:在深度方向上衰減較慢,傳播較深,波動性大.提出了在道路結構動力響應計算中,利用面波來模擬水平向傳播波,利用體波來模擬豎直向傳播波.通過算例來驗證該方法的可靠性和精確性,并利用這一動力響應計算方法分析了道路結構表面波測試中所獲彌散曲線的可靠性

Scientists locate earthquakes by measuring the time it takes body waves to arrive at seismographs in a minimum of three locations 科學家通過測定體波到達地震儀所需要的時間,以3個距離中最小的一個來確定地震的位置。

Body wave velocities 體波速度

From an earthquake source within an elastic medium, both types of body waves will propagate outward into the medium . 這兩種體波將從彈性介質中的震源出發,向外傳播到介質中去。

Two basic types of waves are associated with the transmission of the shock energy: body waves and surface waves . 本波與面波是兩種與能量的傳遞相伴的基本波型。