雨流计数法的matlab实现
时间: 2023-08-23 22:08:49 浏览: 144
雨流计数法(Rainflow counting)是一种用于疲劳分析的方法,常用于统计载荷历程中的循环次数和幅值。下面是一个简单的 MATLAB 实现示例:
```matlab
function [cycles, ranges] = rainflow_counting(data)
% 计算循环次数和幅值
% 初始化变量
cycles = [];
ranges = [];
% 数据长度
n = length(data);
% 寻找峰值和谷值
peaks = [];
valleys = [];
for i = 2:n-1
if (data(i) > data(i-1) && data(i) > data(i+1))
peaks = [peaks, data(i)];
elseif (data(i) < data(i-1) && data(i) < data(i+1))
valleys = [valleys, data(i)];
end
end
% 计算循环次数和幅值
while ~isempty(peaks) && ~isempty(valleys)
if peaks(1) > valleys(1)
% 顺向循环
cycles = [cycles, peaks(1)-valleys(1)];
else
% 逆向循环
cycles = [cycles, valleys(1)-peaks(1)];
end
ranges = [ranges, abs(peaks(1)-valleys(1))];
% 移除已使用的峰值和谷值
peaks(1) = [];
valleys(1) = [];
end
% 剩余的峰值和谷值为单值循环
cycles = [cycles, peaks, valleys];
ranges = [ranges, abs(peaks), abs(valleys)];
end
```
你可以将需要进行雨流计数的载荷历程传递给 `rainflow_counting` 函数,它会返回循环次数和幅值。请注意,这只是一个简单的实现示例,可能需要根据具体需求进行修改和优化。