| 摘要 |
<p>The present invention provides a jig for modal testing to measure frequency of a crankshaft for driving a valve system of an internal combustion engine. As the jig (10) for testing is furnished with a frame(12), a supporting column(14) and a fixing cable(18), the present invention enables the measurement of the natural frequency of the crankshaft(1) more accurately and credibly in the free-free boundary condition with the crankshaft(1) held up by the fixing cable(18).</p> |
