某港连续20年最大风速如下表，请用P3型分布进行风速的长期统计分析，求该港的100年一遇、50年一遇和10年一遇的风速值。年份1960196119621963196419651966196719681969风速m/s20211822213834222222年份1970197119721973197419751976197719781979风速m/s21212420222425222228051015202530354019601962196419661968197019721974197619781980年份风速2712172227323742471112131415161718191P%风速0%10%20%30%40%50%60%70%80%1520253035风速百分比皮尔逊三型曲线计算：当有20个年最大风速值hi，不同重现期的风速值可采用极值I型分布律按以下公式计算：式中hp——与年频率P对应的风速值(m)；λpn——与年频率P及资料年数n有关的系数；h——n年hi的平均值(m)；S——n年hi的均方差(m)。hi——第i年的年最大风速值(m)。按上公式求出对应于不同P的hp，在机率格纸上绘出风速值的理论频率曲线；同时绘上经验频率点。对风速值按递减、对低潮按递增的次序排列的hi中，第m项的经验频率和重现期可按下列公式计算：式中P——经验频率(%)；TR——重现期（年）。年份风速序号排序横比系数K1K1-1（K1-1）2频率PoCs=2CvΦCs=6CvΦKp1Kp6P(%)至P(%)=50的水平距离Xy1960201381.6204690831.620470.6204690832.6259200494.7619047622.3263482.3263484.605175.6867980.1-3.090232306001961212341.449893391.449890.449893392.1021908439.5238095241.6448541.6448542.9957322.5854120.1-3.0902323060401962183281.1940298511.194030.1940298511.42570728414.285714291.2815521.2815522.3025851.5893291-2.3263478740.76388401963224251.0660980811.06610.0660980811.13656511819.047619050.8416210.8416211.6094380.9333761-2.3263478740.7638801964215241.0234541581.023450.0234541581.04745841323.80952381000.6931470.6702595-1.6448536271.4453801965386241.0234541581.023450.0234541581.04745841328.57142857-0.67449-0.674490.2876820.6666745-1.6448536271.44538401966347220.9381663110.93817-0.0618336890.88015602833.33333333-1.28155-1.281550.1053610.66666710-1.2815515661.80868401967228220.9381663110.93817-0.0618336890.88015602838.0952381-1.64485-1.644850.0512930.66666710-1.2815515661.8086801968229220.9381663110.93817-0.0618336890.88015602842.85714286-2.32635-2.326350.010050.66666720-0.8416212342.24861019692210220.9381663110.93817-0.0618336890.88015602847.6190476220-0.8416212342.248614019702111220.9381663110.93817-0.0618336890.88015602852.3809523850-1.39214E-163.090234019712112220.9381663110.93817-0.0618336890.88015602857.14285714Cs=2CvCs=6Cv50-1.39214E-163.09023019722413220.9381663110.93817-0.0618336890.88015602861.90476191.60345E-084.81034E-08750.674489753.76472019732014210.8955223880.89552-0.1044776120.80196034866.66666667750.674489753.764724019742215210.8955223880.89552-0.1044776120.80196034871.42857143XminXmax901.2815515664.371784019752416210.8955223880.89552-0.1044776120.80196034876.19047619038901.2815515664.37178019762517210.8955223880.89552-0.1044776120.80196034880.95238095951.6448536274.73509019772218200.8528784650.85288-0.1471215350.72740167685.71428571951.6448536274.735094019782219200.8528784650.85288-0.1471215350.72740167690.47619048992.3263478745.416584019792820180.7675906180.76759-0.2324093820.58919535795.23809524992.3263478745.4165823.45
