Study on Dynamic Strain Regularity and Influencing Factors of Shallow Buried Metal Pipe under Collapse Impact Load

Table 5

Variance analysis table.

Source of variance	Square sum of factor deviations	Degree of freedom	Mean square deviation		Significant level
Mass of hammer, M	86522.84	2	43261.42	1.52	Not significant
Height of collapse, H	62162.04	2	31081.02	1.09	Not significant
Pipe-soil stiffness ratio, R	1669169.00	2	834584.3	29.26	Significant
Error	57055.72	2	28527.86