Introduction:

This is a hydraulic crane which is commonly employed in the transport industry for the loading and unloading of freight, in the construction industry for the movement of materials and in the manufacturing industry for the assembling of heavy equipment. The customer was frequently facing failures at the load bearing areas of the crane due to dynamic inertial loads and wanted to increase the strength and optimize the weight.

Challenges:

Optimizing all the components in the structure considering the dynamic inertial & jerk loads in linear and angular accelerations.

Scope of Work:

In this process it is subjected to different types of dynamic loads as mentioned below. The total crane needs to be analyzed for the below mentioned conditions in case A and case B and needs to be optimized to the factor of safety 2 using flexible body dynamics.
CASE-A) Dynamic Analysis due to Lifting of crane considering peak Linear Velocity or Angular Velocity
Conditions :  Distance from the column  to hook : 10m/1000Kg, Distance from the column  to hook : 8.2m/1100Kg,  Distance from the column to hook : 6.3m/1450Kg.
CASE-B) Dynamic Analysis due to Lifting of crane considering peak Linear or angular Acceleration(Jerk)
Condition 1:  Distance from the column to hook is 10m/1000Kg

Engineering Solution:

Structural stiffness of the components was increased with good endurance strength and the total weight of the structure was decreased to 16% from the initial weight.