Based on the velocity remapping strategy of the SALE algorithm,three methods are proposed to improve the accuracy and monotonicity of momentum flux calculation on a 1D staggered grid: the SUR method which employs the upwind-type slope and a repairing procedure;the SM method which employs a minmod slope limiter;and the SLR method which employs a new slope limiter and a repairing procedure.
在一维交错网格上基于SALE算法的速度重映策略,提出了3种动量通量的改进算法:①采用迎风斜率加修补的SUR方法;②采用minmod斜率限制器的SM方法和③采用一种新的斜率限制器加修补的SLR方法。
At the gliding stage,LI Ling angel of thigh and ground is much big,the swing legs vertical speed too high,level speed too smell and the enlarging angel of body gravity; At the transitional stage,the transitional time is long,velocity of body gravity and shot gravity descend;The supporting point of LI Ling is prominent,speed-up effect is striking at the ending movement stage.
结论:李玲在起滑时蹬地角偏大,左腿摆动垂直分速过大,水平分速相对较小,重心腾起角增大;过渡步阶段单支撑时间过长,铅球速度和身体重心速度均呈现下降趋势;最后用力阶段主要加速点(用力点)较为突出,加速效果较显著。
Conclusions: At the gliding stage, Cheng Xiao-yan the swing legs vertical speed too high, level speed too smell and the enlarging angel of body gravity ; At the transitional stage, transitional time is long, velocity of body gravity and shot gravity descend; The supporting point of Cheng Xiao-yan is prominent , speed up effect is striking at the ending movement stage.
结论:程晓燕在起滑时左腿摆动垂直分速过大,水平分速相对较小,重心腾起角增大;过渡步阶段单支撑时间过长,铅球速度和身体重心速度均呈现下降趋势;最后用力阶段主要加速点(用力点)较为突出,加速效果较显著。