The test result shows that clamper greatly increases only the first natural frequency.
结果表明，夹板只对第一阶固有频率有较大提高。
The first natural frequency and all natural frequencies areobtained by the power method and the QR method, respectively.
分别用幂法和QR法计算结构的第一和所有自振频率。
Fatigue life of random vibration can be calculated by the fatigue life of sinusoidal vibration under first natural frequency.
可以通过一阶固有频率下正弦振动试验试件寿命得到随机振动下试件的寿命。
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