振动与冲击
振動與遲擊
진동여충격
JOURNAL OF VIBRATION AND SHOCK
2015年
8期
117-120,162
,共5页
周勇%刘贞良%王秀丽%周凤玺
週勇%劉貞良%王秀麗%週鳳璽
주용%류정량%왕수려%주봉새
泥石流拦挡坝%冲击荷载%动力响应分析
泥石流攔擋壩%遲擊荷載%動力響應分析
니석류란당패%충격하재%동력향응분석
dam against debris flow%impact load%dynamic response analysis
选取典型的泥石流冲击荷载,把钢筋混凝土拦挡坝简化成悬臂梁,建立其动力偏微分方程,运用数学物理方程中的变量分离法和结构动力学中的振型叠加法求得动力偏微分方程的解析解,最后根据材料力学得到相应的应力以及应变。算例分析表明解析解是可靠的,且在拦挡坝的坝顶处有最大的位移,为实际工程力学计算提供一种思路。
選取典型的泥石流遲擊荷載,把鋼觔混凝土攔擋壩簡化成懸臂樑,建立其動力偏微分方程,運用數學物理方程中的變量分離法和結構動力學中的振型疊加法求得動力偏微分方程的解析解,最後根據材料力學得到相應的應力以及應變。算例分析錶明解析解是可靠的,且在攔擋壩的壩頂處有最大的位移,為實際工程力學計算提供一種思路。
선취전형적니석류충격하재,파강근혼응토란당패간화성현비량,건립기동력편미분방정,운용수학물리방정중적변량분리법화결구동역학중적진형첩가법구득동력편미분방정적해석해,최후근거재료역학득도상응적응력이급응변。산례분석표명해석해시가고적,차재란당패적패정처유최대적위이,위실제공정역학계산제공일충사로。
Here,the typical impact load of debris flow was chosen,and a reinforced concrete dam against debris flow was simplified into a cantilevered beam,its dynamic partial differential equation was established.Then,the variable separation method in mathematical physics equations and the modal superposition method in the structural dynamics were used to get the analytical solution to the dynamic partial differential equation.According to the mechanics of materials,the corresponding stress and strain of the beam were obtained.The example analysis showed that the analytical solution to the dynamic equation is reliable,and the top of the dam against debris flow has the largest displacement.The study results provided an idea for practical engineering mechanical calculation.