【摘要】 以一种新的、更符合实际的力学计算模型-移动荷载下粘弹性地基板系统来研究场道的无损检测理论.基于线性系统的叠加原理和坐标变换,建立了求解移动荷载下粘弹性地基板的动力响应广义积分公式,把运动荷载问题转化为获取位移脉冲响应函数.然后在柱坐标中利用拉普拉斯和汉克尔变换求解板在瞬时点源荷载作用下的解,再结合广义积分得到道面板在移动荷载作用下的弯沉解析解.以此为基础,采用最小二乘方准则,通过实测弯沉与理论弯沉相拟合,快速识别出E.通过实例计算,表明本文结果正确,基本理论和方法可应用于无损检测技术中来获取地基模量E.更多还原

【Abstract】 This paper is absorbed in the research of the nond estructive testing theory about airport rigid pavements,which is on semi_infinit e viscoelastic foundation to moving load.Based on the transform of coordinate an d principle of superposition,a generalized integral formula dealing with moving load problem is established.An impulse response function used in the integral is obtained by means of Laplace and Hankel transform.The analytic solution to the moving load problem of plate is evaluated by converting variables.Based on the a nalytic solution,theoretical deflection and testing deflection are fitted by lea st square method,the resilience modulus of foundation E which can be rapidly ide ntified is correct and the theoretical method can be used to obtain the resilien ce modulus of foundation E of airplane pavement from nondestructive test.更多还原