The load on the helical drum cutting coal, with a dirt band, is strong nonlinear, transient, and random. The drum is the main working component of the shearer, and it acts to cut and load the coal. This study has provided a basis for the design and optimization of the drum with regard to reliability. The maximum stress acting on the alloy head was 1209.26 MPa. The study has shown that the stress on the end plate was significantly higher than that on the cutting blade. Through the use of simulation, the stress distribution cloud diagram of the drum was obtained. Changing the traction speed in order to change the rotational speed of the drum had a more obvious effect on the load and the stress on the drum. The results showed that when the spiral drum cuts the interface between the coal and the rock, the coal and the rock collapsed and the working load fluctuated. The time history curves of the parameters, such as the stress and strain of the drum and the pick, were obtained, and the stress distribution of the spiral drum during the working process was ascertained. Based on the dynamic analysis of the coal and rock that were cut by the spiral drum, the stress cloud diagram of the coupled model of the spiral drum and the coal and the plastic domain evolution law of the coal and the rock were obtained from the coal to the rock. A dynamic simulation of the cutting process was used to analyze the variation of the load.
Furthermore, they have full use of LS-OPT, a standalone design optimization and probabilistic analysis package with an interface to LS-DYNA.The ANSYS/LS-DYNA software has been used in this paper to establish the coal rock coupling model. Licensees of LS-DYNA automatically have access to all of the program's capabilities, from simple linear static mechanical analysis up to advanced thermal and flow solving methods. LSTC also develops its own preprocessor, LS-PrePost, which is freely distributed and runs without a license. There are many third party software products available for preprocessing LS-DYNA input files. Input files can also be prepared with the instant aid of a graphical preprocessor. All input files are in simple ASCII format and thus can be prepared using any text editor.
Therefore all that is required to run LS-DYNA is a command shell, the executable, an input file, and enough free disk space to run the calculation. LS-DYNA consists of a single executable file and is entirely command line driven. LS-DYNA is one of the most flexible finite element analysis software packages available. An example of a simulation, which involves a unique combination of features, is the NASA JPL Mars Pathfinder landing simulation which simulated the space probe's use of airbags to aid in its landing. In a given simulation, any of LS-DYNA's many features can be combined to model a wide range of physical events. LS-DYNA's potential applications are numerous and can be tailored to many fields. Manufacturing (sheet metal stamping).
Explosions (underwater Naval mine, shaped charges).Automotive crash (deformation of chassis, airbag inflation, seatbelt tensioning)."Transient dynamic" means analyzing high speed, short duration events where inertial forces are important. Nonlinear materials that do not exhibit ideally elastic behavior (for example thermoplastic polymers).Large deformations (for example the crumpling of sheet metal parts).Changing boundary conditions (such as contact between parts that changes over time)."Nonlinear" means at least one (and sometimes all) of the following complications:
The code's origins lie in highly nonlinear, transient dynamic finite element analysis using explicit time integration. LS-DYNA is optimized for shared and distributed memory Unix, Linux, and Windows based, platforms, and it is fully QA'd by LSTC. It is used by the automobile, aerospace, construction, military, manufacturing, and bioengineering industries. LS-DYNA is a general-purpose finite element program capable of simulating complex real world problems.