In the suspension method, the force and displacement of pipeline are clear, and the displacement and force point of pipeline are adjusted continuously via the sling.
悬吊法中，管线受力、位移明确，并通过吊索不断调整管线的位移和受力点。
Based on the initial parameter method, a concise relation between displacement vector and force vector at both ends of the pipe is obtained.
借助初参数法的思路，建立管两端位移、内力向量间的关系。
On this basis, force or displacement load is exerted to find a reasonable adjusting method, in the way the surface figure requirement can be met.
在此基础上，通过施加力或位移进行多点调节，找到合理的调节方法，使面形精度达到要求。
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