施加时间相关的函数载荷以及表格加载
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静力分析或瞬态分析中可以输入表格载荷或函数加载。
1) 下图为通过函数加载与时间的相关的函数的形式。这里使用sin(2*pi()*0.5*time) pi()如果用180话，提前设置系统的单位为度。也可以用弧度，用弧度时就是3.14了。
通过设置分析的结束时间来控制加载多少次。这里用了周期为2s, 总分析时间为20s, 所以有10个周期，那么频率就是公式里对应的0.5。
2) 下图您如果选用tabular输入的话，可以直接从excel中的两列数据，复制粘贴到右侧的数据表即可
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